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Author Topic: For fun: the lowest block hash yet  (Read 16439 times)
bitspill
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April 11, 2015, 05:38:55 AM
 #61

What about the hashes with the most zeros anywhere in the hash? Wink

Is a hash of *all* 0s possible?
Current block with the most number of 0's (anywhere, not just leading) in the hash:

height   hash                                                               note
326799   000000000000000003fec4b5cd08090ab80010345952ab08048e088a00c2b09b   29/64* zeros

(* see earlier discussion on whether all zeros is even theoretically possible )

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April 11, 2015, 06:11:51 AM
 #62

What about the hashes with the most zeros anywhere in the hash? Wink

Is a hash of *all* 0s possible?
Current block with the most number of 0's (anywhere, not just leading) in the hash:

height   hash                                                               note
326799   000000000000000003fec4b5cd08090ab80010345952ab08048e088a00c2b09b   29/64* zeros

(* see earlier discussion on whether all zeros is even theoretically possible )
Smiley fuck me

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April 11, 2015, 10:06:40 AM
 #63

What about the hashes with the most zeros anywhere in the hash? Wink
I listed the one with the most (at that time) already Wink

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May 31, 2015, 11:45:42 PM
 #64

Some visualisations and explanations of highest difficulty / smallest blockhashes:
http://organofcorti.blogspot.com/2015/05/the-tiniest-blockhashes.html


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June 01, 2015, 01:10:33 AM
 #65

I thought this graph...

...was actually more interesting Smiley  Any chance you could plot one that hasn't been binned?

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June 01, 2015, 01:46:26 AM
 #66

I thought this graph...

...was actually more interesting Smiley  Any chance you could plot one that hasn't been binned?

Sure - but then you just get a lot of overplotting. The colour represents the number of blocks in each bin, so unbinned you'd just  have a scatter plot that was solid black at the bottom and black dots at the top. If I make each point translucent, you might see a bit more detail. Maybe it's just the colours that put you off?


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June 01, 2015, 02:15:29 AM
 #67

This is unbinned with very small, slightly translucent points:


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June 01, 2015, 11:50:37 AM
 #68

Yep, that's it.  I thought I noticed some sort of patterning in the color coded one earlier, looks like it's more pronounced in this - I suspect that's just the graphing package and things tricking my eyes, or the ECDF would have shown them as well.  Nice work as always Smiley

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June 01, 2015, 12:49:15 PM
 #69

Yep, that's it.  I thought I noticed some sort of patterning in the color coded one earlier, looks like it's more pronounced in this - I suspect that's just the graphing package and things tricking my eyes 

Randomness can be clumpy - if it was all evenly spaced, it wouldn't be random. Humans are very good at pattern recognition, but it's easy to squeeze clumpy randomness into a pattern.

or the ECDF would have shown them as well

Maybe, but the CDF ignores changes over time. If there were strange patterns from time to time,  it might not show up in the CDF / PDF, if the patterns balanced out.

Nice work as always Smiley

Cheers!

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June 01, 2015, 01:08:03 PM
 #70

Randomness can be clumpy - if it was all evenly spaced, it wouldn't be random.
Cheesy

Just to show what I was seeing - which does go a bit beyond clumping:

If you squint just right and convince your brain that it's there, then you can somewhat see it in the color coded one as well.

But you can see that in the b/w version it's almost certainly just the filtering of samples in the rasterized output.

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June 01, 2015, 06:57:07 PM
 #71

While we're in this thread - minor update.  The current top 20 (green = new) are:

height   hash
334261   000000000000000000002d414bb8f9175ba6c6563721e1ba2c1373c2bd94f29f
336175   000000000000000000005a5e143087632fbf0eea743ad99646d9fc67d40f7441
331908   000000000000000000006836c4009ab00485cd1de4d5958ca7839184d0b80067
357845   0000000000000000000072fb4daee93cb0ef53f292898febaa8353743469f9d1
326055   000000000000000000007e1166d92acf81d4e2d95934fcdec1276b09a7db9390
343775   000000000000000000007eef13ee1f2fcf1b469bd862fcc93b48ec49548ecf6d
340483   000000000000000000008ac86ba28085be84af2ebd6fc6935a004e57fb60c083
313338   00000000000000000000b7de9e5c19e52be073156924b7cf235efb27ae8a202a
355287   00000000000000000000bf159dbb0f8fb3fe450337a5aea11ead28c67673788f
331987   00000000000000000000ec03e3183bacc8b18437180f63f6a563267a186225bc
334151   0000000000000000000119adb3da72742b1eba98f9dc26f73858e91652b42287
333904   0000000000000000000119f88871f8a3c3b7be053c98b31e9c4676df30243cfe
320736   0000000000000000000137130c5a047157e7b0e063de6f3d30246a4f2005a818
315024   0000000000000000000181f37629e8b80debca2c295c350cb1bd156e7e1a25ee
340600   00000000000000000001a092bb0f2311bf00987a8f7d92e2ed6b36a522054741
324204   00000000000000000001bdebf80d8c40d9b30a6fe76b962ff59c8d3cdeec3473
353863   00000000000000000001e5b926f30e95405028c7a99039ca6d0d56fe4e6c3fcd
343641   000000000000000000020fc1ca1268a27de8646059ae2bcca61d13d16890b5db
326091   000000000000000000024b7dea2b63b4e2be64ef1663369fe2f22504587d094b
330140   000000000000000000026ccbc4bbb6a608e90132329190291127f971a604e5c9

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June 01, 2015, 10:45:16 PM
 #72

Yep, that's it.  I thought I noticed some sort of patterning in the color coded one earlier, looks like it's more pronounced in this - I suspect that's just the graphing package and things tricking my eyes 

Randomness can be clumpy - if it was all evenly spaced, it wouldn't be random. Humans are very good at pattern recognition, but it's easy to squeeze clumpy randomness into a pattern.

...
Well ... it's not actually random, it's only pseudo random Smiley
Given enough data over millions of years it would probably show some artifacts of the pseudo randomness.

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August 16, 2015, 03:48:21 AM
 #73

Haven't updated this in a while.  The current top 20:

height   hash
368527   00000000000000000000013712632da34788a7b4ae2cd78f7982c7036610126b
334261   000000000000000000002d414bb8f9175ba6c6563721e1ba2c1373c2bd94f29f
359189   00000000000000000000362e61dba7cfba02b6968a25e1fe97e586a22e87b22f
362662   00000000000000000000408db85bb513d26d72bf0ea42bdae820767f6e2697d4
336175   000000000000000000005a5e143087632fbf0eea743ad99646d9fc67d40f7441
331908   000000000000000000006836c4009ab00485cd1de4d5958ca7839184d0b80067
357845   0000000000000000000072fb4daee93cb0ef53f292898febaa8353743469f9d1
326055   000000000000000000007e1166d92acf81d4e2d95934fcdec1276b09a7db9390
343775   000000000000000000007eef13ee1f2fcf1b469bd862fcc93b48ec49548ecf6d
340483   000000000000000000008ac86ba28085be84af2ebd6fc6935a004e57fb60c083
313338   00000000000000000000b7de9e5c19e52be073156924b7cf235efb27ae8a202a
355287   00000000000000000000bf159dbb0f8fb3fe450337a5aea11ead28c67673788f
359689   00000000000000000000dd919214b66444dcebb4aa0214c1ab7c8b3b633be71f
364962   00000000000000000000e3aadb2227cf42d409efc74cb558915a75f6bc47b156
331987   00000000000000000000ec03e3183bacc8b18437180f63f6a563267a186225bc
369564   00000000000000000000fa6aea584eda3f73baad34a67359cd5d5bf804fb4b22
334151   0000000000000000000119adb3da72742b1eba98f9dc26f73858e91652b42287
333904   0000000000000000000119f88871f8a3c3b7be053c98b31e9c4676df30243cfe
320736   0000000000000000000137130c5a047157e7b0e063de6f3d30246a4f2005a818
368831   000000000000000000015f96db0d6fa3933adc083d316de76684f3a536ce566e

Hurray trivia.

Block 368527 is also the least lucky block hash - which is to say it is the luckiest (lowest hash so far), but it was also the lowest fraction of the target, so the difficulty could have been much higher and it would have still been valid.
Block 331816, in those terms, was the luckiest; clocking in 'just barely' under the target:

00000000000000001b48610000000395e67ff70a0effd0718099cc0000000000 : target
00000000000000001b48534ff39bc165477e3b5459b05679bdcf8ce2a3927fe7 : hash

Actually, the above may not be very precise due to potential conversion issues and big number handling.  The next four contenders are blocks 270605, 50249, 128228 and 316072

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August 16, 2015, 04:17:38 AM
 #74

I keep a dump of the full chain (with a script that simply adds to it by calling bitcoin-cli with one addition, the timestamp converted)
So the best 42 with a few more details: Smiley
Code:
height,hash,version,merkleroot,time,stamp,nonce,bits,difficulty,previousblockhash
368527,00000000000000000000013712632da34788a7b4ae2cd78f7982c7036610126b,3,ba9e999ec89abb48ec43e09baa78ad9d71b686b692bea461fdc4aba203ccab22,1438792320,20150805163200UTC,164730193,18150815,52278304845.59168243,000000000000000007f747d18dfe532711ffd235b2e956087a1eeb1e84a023a0
334261,000000000000000000002d414bb8f9175ba6c6563721e1ba2c1373c2bd94f29f,2,927c4cd7cbbd6108a503066235bb8d67433165621403b33ed1e9647726f25d5a,1418549296,20141214102816UTC,1152930690,181b7b74,40007470271.27126312,000000000000000015d614c45d21815067ba6444375137e2b3f0b3f876d27158
359189,00000000000000000000362e61dba7cfba02b6968a25e1fe97e586a22e87b22f,3,bcebb3c1ca42318f2c23fbbb46ed76cb05bed0d8f640920ac39b2bfcbda14a5c,1433306109,20150603043509UTC,2719600444,18171a8b,47589591153.62500763,00000000000000000a0592d859e14b85ffa12465130afcb46956f348433251ab
362662,00000000000000000000408db85bb513d26d72bf0ea42bdae820767f6e2697d4,3,87b42ed742da80247855b0af2d3eaa347e0991fdfcc36905aba52893c0fc4e9f,1435337761,20150626165601UTC,1939858592,18162043,49692386354.89383698,000000000000000002c302ccf8444d3004410dad95d8fb7f1852416f7770c1d1
336175,000000000000000000005a5e143087632fbf0eea743ad99646d9fc67d40f7441,2,2d95a4d46364433aace4e8db0647016c8c44d1714ac7a5ed2b7e92455cf1c023,1419698136,20141227173536UTC,3018248670,181bdd7c,39457671307.13873291,00000000000000000058a64b1c99fbc1e07a88a7fd582fef64f48f7c382f1b45
331908,000000000000000000006836c4009ab00485cd1de4d5958ca7839184d0b80067,2,16740f453b7d5824d4504cbacf42c982fae541be8b7ba4e207317e6d5454a6a8,1417139324,20141128024844UTC,4177274150,181b4861,40300030327.89140320,000000000000000003cd9048dfba61889e4305832094c6c7683e090d6032c4ad
357845,0000000000000000000072fb4daee93cb0ef53f292898febaa8353743469f9d1,2,06fe1c7085409dc75b24f9455a11706bfa76e333f7534ab5fed6cc1e61010078,1432487315,20150524170835UTC,2988452242,181686f5,48807487244.68138123,00000000000000001535cea56463f8fc76d3680893d650c78b208a55edfe493a
326055,000000000000000000007e1166d92acf81d4e2d95934fcdec1276b09a7db9390,2,1130dc9ed745b04282a4e001bedc79c4a711b6cca98fc71d5bff00152805c150,1413741766,20141019190246UTC,532302443,181f6973,35002482026.13323212,00000000000000000983d8f48d0f9c4f569704a1de7821b0a402d1473fb65eff
343775,000000000000000000007eef13ee1f2fcf1b469bd862fcc93b48ec49548ecf6d,2,ffaa3b7a7f1eaaf69c152e6737442eebcedc4f8d6c0fb8387d54273a41ce5c9c,1424114286,20150216201806UTC,159730112,1818bb87,44455415962.34380341,000000000000000013baae8473d0dbf5e957090ac2a800784d938f1f1f8d8548
340483,000000000000000000008ac86ba28085be84af2ebd6fc6935a004e57fb60c083,2,e4505511a79ca29c2c39eb725a3fc4a4e1778571b060a509854e90813d58aea2,1422229537,20150126004537UTC,2630103979,1819012f,43971662056.08957672,0000000000000000028e90bad02c9baa9c1ad1c3da8131098f4eb266a366450c
313338,00000000000000000000b7de9e5c19e52be073156924b7cf235efb27ae8a202a,2,7e4100d82f943e053ba07f73f9d5a086cd2432794530e2603a3a29304914cd18,1406813345,20140731132905UTC,2884015769,183aaea2,18736441558.31023788,00000000000000001e721b3b255fc67519d72ac2f28cb9000864dfe01e95990e
355287,00000000000000000000bf159dbb0f8fb3fe450337a5aea11ead28c67673788f,3,dbea8b4b6df3d59c4f4d8d623a7f7acd122b58d997dfa925d879f1cdd7529076,1430952345,20150506224545UTC,2815845631,181713dd,47643398017.80344391,00000000000000000953e1f084f05d6cc6900798c3aaab8bbba84ce3f1abab82
359689,00000000000000000000dd919214b66444dcebb4aa0214c1ab7c8b3b633be71f,3,197af49ffe2bab138f99881fb4738d2bddcc5f977da57f91a2eaa115dbba9bec,1433603769,20150606151609UTC,3629404841,18171a8b,47589591153.62500763,0000000000000000065f1b19e9da15f1738ab7541afb49112c563437917677b2
364962,00000000000000000000e3aadb2227cf42d409efc74cb558915a75f6bc47b156,3,19e9687a98f744fcc552fe2c2b03412f95dc30a704c55232d710f7dddbf35c0c,1436686259,20150712073059UTC,579964760,181586c8,51076366303.48192596,000000000000000001ba6ff79ce4e7cbcb310096481c388d614444e5717ecd45
331987,00000000000000000000ec03e3183bacc8b18437180f63f6a563267a186225bc,2,ea85597794d5dbe3b2e37966b499bfb79ff3fe2765d9cb88b5f1038029628ac3,1417179603,20141128140003UTC,279866634,181b4861,40300030327.89140320,00000000000000001ae74a30d04b6be7f5fb9dd2ca46a88d0783a726523c3e3c
369564,00000000000000000000fa6aea584eda3f73baad34a67359cd5d5bf804fb4b22,3,442dae106beff1527fae4dd2a225341b2077994ad31843d161313ae292a2921c,1439390175,20150812143615UTC,347869571,1814dd04,52699842409.34700775,000000000000000010de29f86cdfab5a9f64c02c334bf13456ea12b5d8939b19
334151,0000000000000000000119adb3da72742b1eba98f9dc26f73858e91652b42287,2,cae503590a5ffc744627fc28a22cae4f8cdb627f2121dcf7b4c56a6ee909b4a0,1418480434,20141213152034UTC,3374174994,181b7b74,40007470271.27126312,00000000000000000fc8b4bfb9f64ae5563f647665015bc7b0b1b77d055ad884
333904,0000000000000000000119f88871f8a3c3b7be053c98b31e9c4676df30243cfe,2,53c465268742b0454166e7f8cbe415288fc08745cce3074df4f3ee24884b55fe,1418331464,20141211215744UTC,4245885005,181b7b74,40007470271.27126312,00000000000000000a29a344dff0e0dc65f35279fd0dc659fb030ce0035612fb
320736,0000000000000000000137130c5a047157e7b0e063de6f3d30246a4f2005a818,2,e30836d40ad4e383b78d6696d6c0fb2e237b6e3f9047b534aab1b8376adac890,1410743549,20140915011229UTC,1553977946,1824dbe9,29829733124.04041672,00000000000000001140c9b2930258d81214055b1f0cb0c0c18f9c0d72cead3f
368831,000000000000000000015f96db0d6fa3933adc083d316de76684f3a536ce566e,3,89930f2e705635bc4e9087aa795c997efe10dc8f7341d32e24834167e2daf8f5,1438974822,20150807191342UTC,2888902138,18150815,52278304845.59168243,00000000000000000ef5c32d09d87c30d57f2d34d01ee6fe49be875f0e8f8750
315024,0000000000000000000181f37629e8b80debca2c295c350cb1bd156e7e1a25ee,2,735ce08304da3c77d7ab5103d697818b6353dd2a821bb533f8a747eb9c0ad50b,1407737115,20140811060515UTC,1546279659,1837ba62,19729645940.57713318,000000000000000027244c55854b585fa440ed33a19fff96d9b0d9ac18cccd09
340600,00000000000000000001a092bb0f2311bf00987a8f7d92e2ed6b36a522054741,2,47a68c3f00dfb15fba94e04a99dffb9884516c433a139c4eaeb7fba3aa65186d,1422308436,20150126224036UTC,1520544179,1819012f,43971662056.08957672,0000000000000000102fd0a2f64567685af772d5f085057726e77245ba8f26d7
324204,00000000000000000001bdebf80d8c40d9b30a6fe76b962ff59c8d3cdeec3473,2,0e8cb4d727fa3cbee0a0e65e85fb27fad5db44567268d431bfcddeb4a6fb7279,1412648799,20141007032639UTC,2449200073,181fb893,34661425923.97693634,0000000000000000145887c9c123eca9c13a08edc367c4fe8fbd3455c5bee0b7
353863,00000000000000000001e5b926f30e95405028c7a99039ca6d0d56fe4e6c3fcd,2,0b9c87aeb9d1b22a5f6ff2efb26f89a51bd5938bada7e6c3074e796280acb382,1430091539,20150426233859UTC,2166643748,181717f0,47610564513.47126007,000000000000000004d6eec7188cd404379de74c9de05e3c9bb1765ab483c14c
364761,00000000000000000001f1867bcc72256aecac8530538ffdb5b28b779ad44944,3,ced7dc1a2cb0bda14577efc13602ffc98774b45896a276338fc7827c13d11520,1436566421,20150710221341UTC,4201730147,1816418e,49402014931.22746277,00000000000000000829518a4b80ee009587426a410db462701e93330cfeec3b
367921,00000000000000000001f48148bfcacc557f9488058d566e5d71849290ebb65e,3,f272c6831096485bfa54cb6997c9ebd12c3fe2c07e5308c42fa2d2c666889f29,1438425344,20150801103544UTC,133307560,18150815,52278304845.59168243,000000000000000006df1c9d9b516c43e44edc8a3185ba462f8291ac70625853
343641,000000000000000000020fc1ca1268a27de8646059ae2bcca61d13d16890b5db,2,2d1e2553cb2873ca42ca84334bb8a1307eb917bb0db436c4deccbccf9efb70dd,1424040735,20150215235215UTC,2598231841,1818bb87,44455415962.34380341,00000000000000000c71cbf53cdd4230e5230521b684b7451a46013be383e3e9
326091,000000000000000000024b7dea2b63b4e2be64ef1663369fe2f22504587d094b,2,366b6716c17dc11589bad5b3c69b9ee65376ad3a2f09bc7778cafd840ff76a1e,1413763705,20141020010825UTC,4042894635,181f6973,35002482026.13323212,00000000000000000aaaf4dd84c4084f12d16786d3e47d98e2bffef39520ae36
361907,00000000000000000002621a6c0f2ff0be4d170cc21ffe25303a6b2a17be01ca,3,7669a340fbaea5118a79a0f846740d5850182a07e69d623ca6ed7ed31bd486b5,1434898913,20150621150153UTC,2047674194,18162043,49692386354.89383698,00000000000000000daa63279685c4e0c4f46154194745aaff511a663cc86f22
330140,000000000000000000026ccbc4bbb6a608e90132329190291127f971a604e5c9,2,3b01f647c4ff0bf86891d41cb46db89e71a1cd0bfdb9ba29f0689689d188a8eb,1416063608,20141115160008UTC,2907979742,181bc330,39603666252.41841125,0000000000000000058a2f5227d5535c60153b797ce67248964299f9daabc5c4
266381,000000000000000000028c32e6952731326747bae4be8db0f832d6eea0362050,2,d52cd4da83a38201f24b17d1b6c3cf74d18c5f8f27131d54362434e259b88a0a,1382885384,20131027154944UTC,2279206540,190afc85,390928787.63808584,00000000000000015cc813b33430babf69aadb24b6f527966c8209538d390487
349240,00000000000000000002a133e4691d2f8894a3af7a1b3624e8c2e8c7a8a4fe3c,2,77831799f8bb2eb9675796302e89bf158d058e1d07ca1bc382ad2ce82178eb6c,1427324002,20150325235322UTC,3714376115,181788f2,46717549644.70642090,0000000000000000052793d95d23d66dafaa5ca3d7aba31d6c3282765d5aedb2
357716,00000000000000000002c230842340d7955e15786b68fb16f8630b63e51c17ff,3,240e14294addf470bd0e995fda15035a9df73d46c659b76791b52241d76533b1,1432406721,20150523184521UTC,2564578027,181686f5,48807487244.68138123,00000000000000001609818f7b0a109b2f6f53b5b04be0baa91f6089ac09ea65
357289,00000000000000000003004b63171ac06ce6f8e67f5c203b93e3b67dfc953f65,2,3fd109b08ff9b3e69a4432ca84d84de12bfef2f3fb0aecc31b7c4b29c48f6ded,1432141803,20150520171003UTC,13232467,181686f5,48807487244.68138123,0000000000000000131e2c37a475e6c97e77e628363fc956af9ebda83d7f1658
330727,00000000000000000003107221e16ef91fdf83b3729c5f370dafb754bf6443b2,2,9edb646b5611eb92aac396add2f4d88581499a96319717cf9436d00ca287b7b9,1416413591,20141119171311UTC,3886406479,181b4861,40300030327.89140320,0000000000000000173e5c50f8c5ba633a7f32ae15fe29e343acae4ac7df4f2a
369067,00000000000000000003120d4ebe3f05623607a87339b98b66970b3825a14c9f,3,d68659b7bcea6c9839cf4e26d0af6e232840011f75d4cc57c305af842f5740df,1439110756,20150809085916UTC,655651400,1814dd04,52699842409.34700775,0000000000000000101238807f0a2755eb371052dffe02074f21ad9bd26fb9c9
356840,000000000000000000034689570e541599293d08851f9eb00941d9112439cf6f,2,4dc4f971b97f8372693cb9714afb4f39c6ba41d803efa5aae9c9255824d6a18f,1431862378,20150517113258UTC,1760314433,181686f5,48807487244.68138123,00000000000000000b2db372069c8b586a4fc9ee6ba7b4ca17c65a4c2c28f463
366432,000000000000000000035646f09e9e9637d7611254a2506765ecfb324c5a5ba8,3,41d9fb7f97a329419edf50b5efc43a088100004c5e09df58af1c9828756d585b,1437561929,20150722104529UTC,322633431,181586c8,51076366303.48192596,000000000000000012d54a1834be3497eb5f314408d4b8287b3ccff81701f5d0
336920,00000000000000000003565c1c978f85944e222d6e9e65ed57488e34deed8774,2,a66c7ff9cede074b592a3e6f235641df73e27bf36fa542492530ed7b7b7e1781,1420100382,20150101091942UTC,117040972,181b0dca,40640955016.57649231,00000000000000000e74924a279c8090f5fc61dd023487861bfb2459a14d6f32
316203,000000000000000000037be5d0bf7a0d03db565b07f512dab5d8cda0348bbbed,2,860cac4cc458383cb3812e36839deb175d91c196226b441c257c07474bd13296,1408342281,20140818061121UTC,1514325168,1837ba62,19729645940.57713318,000000000000000016754abc5ae5fa93ffdf3c3e5787678784f7dbd60a6fada4
361221,000000000000000000038ae8d3027b466a0cac99f9244eae9a55e8194838bfc2,3,11a4f3f3ccbbf4e139fea010db8fa56cb0b65e4500a37ae0e9deffa0a45725d8,1434488383,20150616205943UTC,2096808613,18162043,49692386354.89383698,000000000000000010a82cf40399c43f0f8158c03adcdf45470eb7dee9e7098f
360158,00000000000000000003bf3e85ccdbf1d678e0d66c6bd3c7a166cd08d3cd3898,2,abf46fae59991465a8527e6d356c057c153e61feb086006e3e8c2d6cd2d71a46,1433861114,20150609144514UTC,473787162,18171a8b,47589591153.62500763,000000000000000002cbf1aac3f94f1133910cb80cdbce4d14cd825489c18958
(which is just sort -t, -k2 blocks.all | head -42)
File is currently 99,500,103 bytes up to block 370068

282 block hashes contain beef Smiley

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August 16, 2015, 06:26:05 AM
 #75

Block 331816, in those terms, was the luckiest; clocking in 'just barely' under the target:

00000000000000001b48610000000395e67ff70a0effd0718099cc0000000000 : target
00000000000000001b48534ff39bc165477e3b5459b05679bdcf8ce2a3927fe7 : hash

Actually, the above may not be very precise due to potential conversion issues and big number handling.  The next four contenders are blocks 270605, 50249, 128228 and 316072

Just an FYI: the "bits" parameter of block 331816 is 0x181b4861.  This value represents the true target and unpacks as
0x0.1b4861 * 0x1000x18
=0x1b4861 * 0x1042
=0x1b4861000000000000000000000000000000000000000000
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August 16, 2015, 06:38:46 AM
 #76

I keep a dump of the full chain (with a script that simply adds to it by calling bitcoin-cli with one addition, the timestamp converted)

Very cool!

I'd be curious to see grep '000000UTC' blocks.all myself.
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August 16, 2015, 06:46:21 AM
 #77

I keep a dump of the full chain (with a script that simply adds to it by calling bitcoin-cli with one addition, the timestamp converted)

Very cool!

I'd be curious to see grep '000000UTC' blocks.all myself.

Well yeah but there is of course the issue that the block timestamp is far from accurate.
It's simply the timestamp put in the header before hashing it, it doesn't need to be very accurate and can be 7200 seconds (2hrs) ahead in time.
There's 8
Code:
21757,00000000901764e2469aa8e34ccf3688ece4a43f75a6ef876f114c9ebcae6cbb,1,c1f8478a7e46e03b7326e0d55ad6848a7fb1cd8819134d52b88ebaa0752e99e6,1251590400,20090830000000UTC,3593416220,1d00ffff,1.00000000,00000000454e4447e1b3227b6573b610bedb3ae690b7e7862d6b971e4cf51ee5
34274,00000000296e482f492c06e598f35ce9f351f0d1e00220205f11ca932a1b3f8a,1,c1b9332164aed8bb1f9e029463523735c1da10f8548faa13cf6a22810091b17f,1263250800,20100112000000UTC,74552828,1d00c428,1.30506213,0000000013fad98598accf6d68c234b8fb22ab05ae24fb98b043dbd25dc84a6f
84461,0000000000254cb84cbb8ca4b1a2c6f4d15a01af80ccfa9ba243c06a8aba5a46,1,bc6b5309eb0ddf78cf92a6c9d1f93e76b9ed497aa353d3efad41704a8db210c1,1286751600,20101011000000UTC,496010461,1b31b2a3,1318.67005015,0000000000060af2631eb2dc238985d1f8e27279d75a5bfa123febb0f478719e
117090,000000000000a27b8d06b7353e6c1d7f8b0e01449e85cbd4bda93645c6e154f2,1,a7347ce38d6b67ef5459418113af220cb26cb188f366e2d6c9f88ebeb7797057,1302134400,20110407000000UTC,1465509707,1b00cbbd,82345.64411297,000000000000b836fe0c1fcbdaa0229d0608ca7ec9f098871792357b839357c5
160030,0000000000000d575be2b8874bf9ce10c382669a1827ff2e88fae0598eabeba8,1,5b7ca99a397fef3db62397281092b6e444bb0d6fa46c2dfa88534bac7e1a8189,1325372400,20120101000000UTC,2793405837,1a0e76ba,1159929.49722438,0000000000000942122ac20248851ec357b546c4a340eb67392b74202537a299
300936,000000000000000063d5423cadcbdaf25d0e56f2aef3714eb1d55b144f048931,2,56c304bfae885495c28ff7d51249981fca687e8468164c47ffcf1af8b853d584,1400198400,20140516000000UTC,3629228942,187c3053,8853416309.12779999,000000000000000046ca098391e34775ecda24933f56ee1c858e635e2bf12589
321935,00000000000000001533f171b7c1c5d41d734e8ce4c6bce03dfbff6a41c5d862,2,47ee20dd270997423715df7f00daf6f916681964c1c8fb798c2dd03a06dca5f2,1411344000,20140922000000UTC,189477608,1824dbe9,29829733124.04041672,000000000000000017438c1afdbf096d3b763d7f0368407567377d4eec7de7c6
367561,00000000000000000339efa2d9e1c8b7518019b441ba3ad7fbcfbbcd90ff2229,3,798f9f4e4cbd0ffaf7ef26b5e33a526bed0753a44784f350652e3d2406461970,1438214400,20150730000000UTC,634368344,18150815,52278304845.59168243,00000000000000000aa65b2ca4f6a982b5502c86c178cb5b44b0057b0c64e356

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CKPool and CGMiner developer, IRC FreeNode #ckpool and #cgminer kanoi
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August 16, 2015, 11:03:27 AM
 #78

Just an FYI: the "bits" parameter of block 331816 is 0x181b4861.  This value represents the true target and unpacks as
Yeah, I didn't grab nbits so had to make do on the data I had - maybe I'll revisit it, maybe not Smiley

282 block hashes contain beef Smiley
Tasty Smiley

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August 16, 2015, 01:07:25 PM
 #79

I keep a dump of the full chain (with a script that simply adds to it by calling bitcoin-cli with one addition, the timestamp converted)

Very cool!

I'd be curious to see grep '000000UTC' blocks.all myself.

Well yeah but there is of course the issue that the block timestamp is far from accurate.
It's simply the timestamp put in the header before hashing it, it doesn't need to be very accurate and can be 7200 seconds (2hrs) ahead in time.

Yes, I'm well aware.

There's 8
Code:
21757,00000000901764e2469aa8e34ccf3688ece4a43f75a6ef876f114c9ebcae6cbb,1,c1f8478a7e46e03b7326e0d55ad6848a7fb1cd8819134d52b88ebaa0752e99e6,1251590400,20090830000000UTC,3593416220,1d00ffff,1.00000000,00000000454e4447e1b3227b6573b610bedb3ae690b7e7862d6b971e4cf51ee5
34274,00000000296e482f492c06e598f35ce9f351f0d1e00220205f11ca932a1b3f8a,1,c1b9332164aed8bb1f9e029463523735c1da10f8548faa13cf6a22810091b17f,1263250800,20100112000000UTC,74552828,1d00c428,1.30506213,0000000013fad98598accf6d68c234b8fb22ab05ae24fb98b043dbd25dc84a6f
84461,0000000000254cb84cbb8ca4b1a2c6f4d15a01af80ccfa9ba243c06a8aba5a46,1,bc6b5309eb0ddf78cf92a6c9d1f93e76b9ed497aa353d3efad41704a8db210c1,1286751600,20101011000000UTC,496010461,1b31b2a3,1318.67005015,0000000000060af2631eb2dc238985d1f8e27279d75a5bfa123febb0f478719e
117090,000000000000a27b8d06b7353e6c1d7f8b0e01449e85cbd4bda93645c6e154f2,1,a7347ce38d6b67ef5459418113af220cb26cb188f366e2d6c9f88ebeb7797057,1302134400,20110407000000UTC,1465509707,1b00cbbd,82345.64411297,000000000000b836fe0c1fcbdaa0229d0608ca7ec9f098871792357b839357c5
160030,0000000000000d575be2b8874bf9ce10c382669a1827ff2e88fae0598eabeba8,1,5b7ca99a397fef3db62397281092b6e444bb0d6fa46c2dfa88534bac7e1a8189,1325372400,20120101000000UTC,2793405837,1a0e76ba,1159929.49722438,0000000000000942122ac20248851ec357b546c4a340eb67392b74202537a299
300936,000000000000000063d5423cadcbdaf25d0e56f2aef3714eb1d55b144f048931,2,56c304bfae885495c28ff7d51249981fca687e8468164c47ffcf1af8b853d584,1400198400,20140516000000UTC,3629228942,187c3053,8853416309.12779999,000000000000000046ca098391e34775ecda24933f56ee1c858e635e2bf12589
321935,00000000000000001533f171b7c1c5d41d734e8ce4c6bce03dfbff6a41c5d862,2,47ee20dd270997423715df7f00daf6f916681964c1c8fb798c2dd03a06dca5f2,1411344000,20140922000000UTC,189477608,1824dbe9,29829733124.04041672,000000000000000017438c1afdbf096d3b763d7f0368407567377d4eec7de7c6
367561,00000000000000000339efa2d9e1c8b7518019b441ba3ad7fbcfbbcd90ff2229,3,798f9f4e4cbd0ffaf7ef26b5e33a526bed0753a44784f350652e3d2406461970,1438214400,20150730000000UTC,634368344,18150815,52278304845.59168243,00000000000000000aa65b2ca4f6a982b5502c86c178cb5b44b0057b0c64e356

Thank you.
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August 16, 2015, 01:18:04 PM
 #80

Just an FYI: the "bits" parameter of block 331816 is 0x181b4861.  This value represents the true target and unpacks as
Yeah, I didn't grab nbits so had to make do on the data I had - maybe I'll revisit it, maybe not Smiley

I see.  No worries.

282 block hashes contain beef Smiley
Tasty Smiley

Perhaps we'll see "decade" within Bitcoin's first 10 years.
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