Searching for interesting numbers in the blockchain

[scintill]

I added a "palindromes" callback to znort987's blockchain parser and searched for binary, hex, and decimal palindromes in block hashes, merkle roots, timestamps, nonces, transaction IDs, and pubkey hashes.  Here are the results:

Block timestamp 0x49900994 is a hex palindrome in block 00000000785228f0d067057b286955caed37d7b57085adc9199f2412213c3b99
Block timestamp 0x4abeeba4 is a hex palindrome in block 00000000ebc7b517e1c9385addb5f8ec7b84840c905d2486a1b2e8dc2da653e8
Block timestamp 0x4b6ff6b4 is a hex palindrome in block 0000000078964f466ede887575bf17f9931c424e20f565482502c375e78c977a
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000009315c7421600ff044405eee043885867df5b46a277192dbd113216
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000009315c7421600ff044405eee043885867df5b46a277192dbd113216
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 0000000000228dec2e627b7c512176edf742eb1e0f6719bb4b1b816ba5d75603
Block timestamp 0x4ccffcc4 is a hex palindrome in block 00000000000af5de15edef93f1c711cbc32cd33b6b25c8de3cfd91f2509b4b31
Block timestamp 0x4cf88fc4 is a hex palindrome in block 000000000008109732242994585e9aa7d3b265ebc21196281473744c0a275383
Block timestamp 1298778921 is a decimal palindrome in block 00000000000175869b4bc532138e1b7c4e6a7169eccbc46d476ebca919026d84
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000197f088559be430f36cd360d3047feac85330b79d1e928c82695
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000003214cf62fdf006fa8b951e1deb453ba2018d8b8f63c830a948d
Block timestamp 0x4e2332e4 is a hex palindrome in block 00000000000005f82b5d773a9226142ede3fe469f87e53676f19a7d6f2916843
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006c54594a897ffc5b7ffbbe25eeab76a8dd58e8d877cb7a70f70
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000008837c00fb07dc8e671d341118cb66a70dd4d9e470967bb3d7a5
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0xffffffffffffffffffffffffffffffffffffffff is a binary palindrome in block 00000000000006de54f6fb74d6eafe65b9bec53374a3db8237778ffbecf04b24
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000092b627225c12877980fca2ab0d4d1253a900bc29fee9741b19c
Block timestamp 1324004231 is a decimal palindrome in block 0000000000000479ce6373d5fb6c33073a7d4547a67a35ec6a47b109421658b7
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000074e1834d5f1a990762e30272fc4d78646b49e5a38c3e5e76158
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000003da42ceefcbf1f08f7694b85bc48735e7d31a5e8e67fc9f7d1b
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 0000000000000474027e8589db6d02b0b93513c76471e20ca557fc950f6f85bd
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 0000000000000638d41e052dc51c3d3712e7822d3be75188c9b8967b481aef9e
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000028791aa9aa3344da2096a29a0c921a748540b074965460d589a
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 0000000000000716326d98fbaf186acc98d4de744a005b97a373219de01458b4
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 000000000000015c80d7b124c8c9c969954b358200ab05682b174c25fede45cf
Block timestamp 0x5027e40a is a binary palindrome in block 00000000000003ddd28f3a9a93ef1eabb73d3e5ebd81740520a86dbc95b243b8
Block timestamp 0x503dbc0a is a binary palindrome in block 000000000000059a9c285df40af089e521f3cdc2635df6107410b7270cca1641
Pubkey hash 0x0000000000000000000000000000000000000000 is a binary palindrome in block 00000000000005fb45b08230ee63ab898f703a3bb3fea456c26402e45814c9d5

I published my code as a fork of blockparser at https://github.com/scintill/blockparser.  I was kind of disappointed to not find more interesting palindromes, but there are some more places I could look.  The addresses 1111111111111111111114oLvT2 and 1QLbz7JHiBTspS962RLKV8GndWFwi5j6Qr are pubkey hashes 0 and (2^160)-1 respectively.

Edit: And some mathematical constants:

Block merkle root: sqrt(2) in 37245141421355635626456645887678355043127166133188105028336168301056546577243; block 000000000b8d3b3eafbeec6a60625ac1c9f54fb55d8fd425a6464e4605498321
Txid: sqrt(2) in 37245141421355635626456645887678355043127166133188105028336168301056546577243; block 000000000b8d3b3eafbeec6a60625ac1c9f54fb55d8fd425a6464e4605498321
Txid: e in 105544460398502153569957319271828186134820610010186914157193559637237556361017; block 0000000000b1a475e98cd98bf599c3b9b1aa0fd4f992a2116ba89f29c1dd988f
Tx value: e in 271828183; block 0000000000001646f6b71e796dcae8636ed90fee08a7664c9fe501a766b8b74a
Tx value: sqrt(2) in 141421356; block 00000000000026f17f5310d3fa6967672b4396352d47276f4163ea8aa0e14a23
Txid: sqrt(2) in 66773787242736024187585638469908825771865488197053530421740690241414213582583; block 0000000000005a33c41fa455ce2805c8aa9ced7a888e3eeb2bd3e5a4c9037061
Tx value: pi in 314159265; block 00000000000023caaafa01aae09f11bc6fc74af091c4fb56e4f5f7af1d293540
Tx value: pi in 31415926; block 0000000000001a25032ee5606837e052a7bc7aa5af399a635b19e644a69f4184
Tx value: sqrt(2) in 141421356; block 0000000000000f4b0aa11442a0970d3ca4b92acdaa06cb4fded59d8df301fd6c
Tx value: pi in 314159265; block 0000000000001c8b844a21bf332df2719cc5d82d9096332a735dfbb224fe7474
Tx value: e in 271828182; block 000000000000038af85944f31698aedcdc633079aae090c6a6dc33b2648e3867
Tx value: pi in 31415926; block 000000000000107934d38b25eede57a368207aa1c3956f64062f0c1288118356
Tx value: sqrt(2) in 141421356; block 00000000000001a6e8e4dd183b99aa637ee625fcdf901fe7afca23e6ebd87bed
Tx value: sqrt(2) in 141421356; block 000000000000043dd94eb922fbf4e21eedf05f7af1ec5477470955c523bfdd6c
Tx value: pi in 314159265; block 00000000000001b1580da4f8bb67881c5016dfe9f9f12f229f0cfe6b78411d96
Tx value: pi in 3141592653; block 0000000000000482807dab30f0e64ff85b59aa63be844149cb48201e4489d338
Tx value: pi in 314159265; block 00000000000001dab0fcc0b2ac73e602eb804a601d1c9465eb6382e64060cebe
Tx value: pi in 314159265; block 00000000000004b9c85127232aa14c0f6e7f8209dd33e174c21565d53a5aa8f7
Tx value: pi in 314159265; block 00000000000001873dd52b2631b653948020ca2c4ccd96503262ab6ecdbb4a29
Tx value: pi in 314159265; block 000000000000054f33f3b400364871ea6edf5f60bf7f27e1d4ee27e71224d85c
Tx value: e in 271828183; block 000000000000054f33f3b400364871ea6edf5f60bf7f27e1d4ee27e71224d85c
Tx value: pi in 314159264; block 000000000000083b54e1c9d1a5b0c574748e961de17a24978c7426749dcf03ce
Tx value: pi in 314159264; block 00000000000001c8d14ac8f32a9132077093c09034aad24828c89c1b117a6103
Tx value: pi in 314159264; block 00000000000001c8d14ac8f32a9132077093c09034aad24828c89c1b117a6103
Tx value: pi in 314159264; block 00000000000001c8d14ac8f32a9132077093c09034aad24828c89c1b117a6103
Tx value: pi in 314159264; block 0000000000000057aa2dc02d19821d1d5584e73917be0a800be71201faa6b09e
Tx value: pi in 314159264; block 000000000000077a4287d237ef8ca502289e9343cdf4dfdcbd5ba37b881c9a86
Tx value: pi in 314159265; block 00000000000000e5b92b26af07e8954040654f33621bbc26ff8812dc6ff33743
Tx value: pi in 314159265; block 00000000000002747033a85fb5d33e522d32564458584b9004f3df976c3dbd96
Tx value: e in 271828182; block 000000000000068e8bc892fd269a8c12b89cb3dea9990745416f762ea42a14eb
Pubkey hash: pi in 1218694334200412625253815597314159267211030768873; block 00000000000006fca7ebb436099cb859e877d45da10d5bbac189ad25443af3a5
Tx value: pi in 314159265; block 000000000000087970c750c4266507c505113564cd504157987e0a8d1f59153c
Tx value: pi in 314159265; block 00000000000002b433186cd30e36a8a5bce76d048d11a421fff0a8b915c53a3d
Txid: pi in 99097357594741351944211530591343452130748484016967249253231415926647123284334; block 000000000000006463a1c653abdb5cb7b028468f2eae0fbe2552868e923b0662
Tx value: sqrt(2) in 141421356; block 0000000000000952c13ad2db90555163eedb126e8018fe6b54ecc4439dcf427c
Tx value: e in 271828182; block 000000000000033ff697156383e2be71468db78c09fdf5dcec3ef9a4eb2dea4b
Tx value: pi in 314159265; block 0000000000000323bc78487f7bd2aa33a3a1cb9f8b684fb7613d47421d7949e0
Tx value: pi in 314159265; block 00000000000003ef3857bb5a3e93d43ae7bf92207320456d592e6bea2c550db6
Txid: sqrt(2) in 82032478326398956938058081975649331664892341414213593075409392663023456994708; block 00000000000000c82a3bb5e6ff882d1d05833cc991c1a37220fd4006b909f18a
Tx value: pi in 314159265; block 00000000000000b95fd8444a913f6f2fe93f5270e4ba1b06cab392223f81a8d9
Tx value: pi in 31415926; block 0000000000000b72c5ff9aeef3e7a9fd0478999d3e7d8ada67ea40395fa12449
Tx value: sqrt(2) in 141421356; block 0000000000000e1d542e2c0738dbf300f683948567bff9e2d9795b19ba8e09f0
Tx value: pi in 314159265; block 0000000000000c6b3f40c1c9644c0d53a288d9ca41cbecb0ff5005b92ae846cf
Tx value: pi in 314159265; block 000000000000025046fc109584891d7c87d3fda74fce51905b83c8523b54c536
Tx value: pi in 31415926; block 00000000000001b029d4afcb8c1c3b307b0bb1e9ec0d609ee82d414a625508bb
Tx value: sqrt(2) in 141421356; block 00000000000001b029d4afcb8c1c3b307b0bb1e9ec0d609ee82d414a625508bb
Tx value: pi in 314159265; block 0000000000000b31ce216cc2c82656cb8c2840ad1ce2e7c81ed8bee8aa76a702
Pubkey hash: sqrt(2) in 350217025380545284471707036759615079041414213572; block 00000000000004f28687644467a9f8288681845a6d3d570cb1bc74f29c300f13
Tx value: pi in 314159265; block 0000000000000a77f15b54aee8f52bc6bcf9e1b41fab1f68b0d4aa7704778f09
Txid: pi in 15953756917313815240043719151629273141592653028288677149170531471594409484292; block 0000000000000509543df7cb64b6a50faa348788b10567c9c22ebdf86b854229
Tx value: pi in 31415926; block 00000000000008c38b964d65421bbe8c54d38341c3294e501246c643ada0641f
Tx value: pi in 131415926; block 00000000000005a88fff18e6cfda0468b7d65d3837afcf62810546bcada8be60
Tx value: pi in 131415926; block 00000000000007a4b9e4d47a6b2326a2205598b637e7266012e071dfb7703280
Tx value: pi in 131415926; block 00000000000007a4b9e4d47a6b2326a2205598b637e7266012e071dfb7703280
Tx value: pi in 314159265; block 0000000000000a7af37e6bcaff256922548a242c646f9809cff55310fce49b55
Tx value: sqrt(2) in 141421356; block 0000000000000745787b0a55c268e0149d7c3e6e84dca7ccf3973d49b5dc3a21
Tx value: pi in 314159265; block 0000000000000b7e6182f01e9b1319e775f5ed151b94edfc4535d5cd08815f5d
Tx value: e in 271828183; block 00000000000007a53d5d8ae7a413e6fc1fe68492d50e80377f63e87e97a6005a
Tx value: pi in 2031415926; block 00000000000005dc726a57f7dc911c7dbc1abd35fe2212150530ff192f1977d8
Tx value: pi in 314159265; block 000000000000053dc4380fa7f1714e4b69c72996f5a25920a76792475717d347
Tx value: pi in 314159265; block 000000000000050502728fe6d97948e0b28c864e37f6f6153e3e5c5f4cb2e38d
Tx value: pi in 314159265; block 000000000000083bde45abe637c315bf01d2608a99949c3a0dfa10eb6f35086d
Txid: e in 38497502718281804387657809558732431700422037898379951526735910483644198727515; block 000000000000086b7b4bbf448cbbaed565f50abc8371f8b028f648d3954333ab
Tx value: sqrt(2) in 141421356; block 00000000000008554460131a816980d0ee4ff2cc12f938a7e6c9e8c2edb8936b
Tx value: pi in 314159265; block 00000000000006208f1736c7862aea68ae4a10cd16c590965f7f8ec04bf76ae0
Tx value: e in 271828183; block 0000000000000787ef7a8494c1a8d30a2266f998efe4f1ae2abdaf5d91ea609e
Tx value: pi in 314159265; block 00000000000005e5e0b15f166813834af0542c7a21fb63b4603131a03d97bbba
Tx value: e in 271828182; block 000000000000024dcdc5f452eb292549580e897b53fa3d736cbf419ad0998ac0
Txid: sqrt(2) in 81926304148224233282160186141421353875224304956831582146000873851165698212552; block 0000000000000aa9fe59ef66215876592bf6feec5b12dbb48439aabc802d5288
Tx value: pi in 314159265; block 000000000000080d627ea124f293947d457551c91195e3db6197a60d29179ca0
Tx value: pi in 314159265; block 000000000000029b1cf89a4a75c615d9f2c9a0b75931ffe2b20434c80565c349
Tx value: pi in 314159265; block 000000000000029b1cf89a4a75c615d9f2c9a0b75931ffe2b20434c80565c349
Tx value: pi in 314159265; block 0000000000000056c5c429862f02f297e683e1f57c65d08edbd91096087861aa
Tx value: e in 2718281830; block 0000000000000098fed31be999d316d45ecb1c7da53d21e5f48c4dc3607c2635
Tx value: sqrt(2) in 141421356; block 00000000000004ceb963c49e1c94588f919ebb12bcad853cb507ff948b72b7fb
Tx value: pi in 31415926; block 0000000000000252d8fd918f2a7a7a3d645b0b45243cc7fe7be37b056b993e44
Tx value: pi in 314159265; block 0000000000000a21fecf1186ac52d36a21e470ee51ade1ce2e74b69fafa90f81
Tx value: pi in 31415926; block 0000000000000315325ce427fde179aa19fea0681be168f44b228c27a2d38e31
Tx value: pi in 31415926; block 000000000000084f73999cc9528f66baffbfbb9d2c636acf7c94a996bc9ea5b8
Tx value: pi in 31415926; block 0000000000000613c2dbc1369b0fb63105c24d35a62234dd60d22de356e15f3c
Txid: pi in 17639716694421823937237143853734171424714062314159266423045758722787396218688; block 000000000000021754f3b72bfc1f7ba877ee7b811db60c40355b3dc546a6e3b9
Pubkey hash: sqrt(2) in 1314142135899594022351733891044441226820587300328; block 000000000000044567ed5c8d5470912e814dc712114474f147eda835d49dfafc
Pubkey hash: sqrt(2) in 1314142135899594022351733891044441226820587300328; block 000000000000044567ed5c8d5470912e814dc712114474f147eda835d49dfafc
Tx value: pi in 314159265; block 00000000000003f679bf2e7b0c1a4e7167c5a9768afa388c4507343efede6c84
Tx value: pi in 314159265; block 00000000000004a62b16471ce3a3df696992819b4047c2ac0e844b75c4e3e8b9
Tx value: pi in 31415926; block 000000000000036050969046f7481e2675c530486daffaaa3a7b18fefeb174e0
Tx value: pi in 31415926; block 000000000000036050969046f7481e2675c530486daffaaa3a7b18fefeb174e0
Tx value: pi in 31415926; block 000000000000051b48b60613bebbb3168d5d7e1ef898b6efedd240e24d655a45
Tx value: pi in 31415926; block 000000000000051b48b60613bebbb3168d5d7e1ef898b6efedd240e24d655a45
Tx value: pi in 31415926; block 000000000000070a8205504c865ca8755bf4eaeff6a0a9f02915f8e51c393209
Tx value: pi in 31415926; block 000000000000070a8205504c865ca8755bf4eaeff6a0a9f02915f8e51c393209
Tx value: pi in 31415926; block 00000000000003a2871f99a0e4f9fadfaf93e263f1306600494fbbd938af6e85
Tx value: pi in 31415926; block 00000000000003a2871f99a0e4f9fadfaf93e263f1306600494fbbd938af6e85
Tx value: pi in 31415926; block 00000000000007673ea0d9f07546013101e34030efb53ee109450fbd0a7c3172
Tx value: pi in 31415926; block 00000000000007673ea0d9f07546013101e34030efb53ee109450fbd0a7c3172
Tx value: pi in 31415926; block 00000000000004a776affed53b0713837474ff8b3233ea18f94067ec32b2c1aa
Tx value: pi in 31415926; block 0000000000000520321f94584172039a22bf242b6d87aff10d8914dd55ec2d61
Txid: pi in 113906323188750983549070484143141592652076235165352746176130134600930909504461; block 000000000000089965e32ada1cb535ec1da25644b9b0e280bd1891acfa2d5d6a
Tx value: e in 27182818; block 000000000000075de4b203c697a53a2942a3ce12547251989b57aedbc80dee37
Txid: pi in 50381839877851454105933162603916045572163141592621385175893678692166366332424; block 000000000000035b55ef844fbce0bc0dda72ae00193ed80f3a4d55333ae66988
Txid: pi in 46267364205733035746051328724351031415926276598183230148406180766521366216260; block 000000000000026f39fe020c958831129c6e8f0b97f5333e6346949b83e441df
Txid: e in 72774016726130186745515528477250120082271828180698181334589200284821468062054; block 0000000000000935480a4d959740fb59e0788c398b3051bc04fff93e88f029c3
Tx value: pi in 314159265; block 00000000000005b9d06224b7c095f7659f57b3e2eb0bb0cadd592967c3f8c1df
Tx value: pi in 314159265; block 00000000000007975cb5abe4669633da0c1ed04ea8f01e40a2c3a730a2221762
Tx value: pi in 314159265; block 000000000000074ebb6403d14d020709d18460d0af858b5f5605d6a6ae985d39
Pubkey hash: sqrt(2) in 98134863131382114142135109179843737387079865096; block 0000000000000079c800d8365a5b7c9f5a54546a1d05fa5ed9adc6085c7fb4bd
Tx value: e in 271828183; block 000000000000011e2ea199cd4930636caa7047ca55b946601e1fd3b8336d1d4c
Tx value: e in 27182818; block 0000000000000342f7b5fd604c100ef33f42b35ab702fa551ffcc069de1355b0
Tx value: pi in 314159265; block 0000000000000285297e16d9456cccd123b04847f68494b97ed43fea3e118d04
Tx value: pi in 314159265; block 00000000000006a2946e3d38fc611c7ca236009aeadb5edb9eb93f76731e6ed4
Tx value: pi in 314159265; block 0000000000000271dd72dc00592b31f57c264ebd079ea89742ce72d2fb5fe24a
Tx value: pi in 314159265; block 00000000000000583b13f0e1a5378a6197830c67e1b46bd16d2d4bbc971ebf1b
Tx value: pi in 314159265; block 000000000000071d387bd1e262aa01c671b2938fb76b9150df9136e8a12c10d6
Tx value: pi in 314159265; block 0000000000000322706a41afc195efbd6f04e72d9037843606c9b8e8caa5c60e
Txid: e in 9233885156114057171168843525862718281828300952464457920757673296459734350352; block 00000000000006d162b7027c0498243495bb45132ed3aa182e837968c27aec53
Txid: pi in 46054600098242627211010493141592653430377911309896555080426701226875982095730; block 000000000000006a81e84c7e00988bc94a6b788b7103da1bdc24a38717f7401d
Txid: e in 33462236559376784357532512458790226451498680851825943836127182818426101701291; block 00000000000005566b70098bccf0e338b80e15f830c58c0f11ec7a3992b17d68
Tx value: pi in 31415926; block 00000000000003f1d23d509b4bb2b66e6e2953329d39abbb2a3fe810d299c533
Txid: sqrt(2) in 64361414213536840126162400137448713532012736408105346720569002681807643674117; block 00000000000004a3c3de47bde40a8fbcb29635d5bdb07daa70a75dfd85fca0bb
Tx value: pi in 314159260; block 000000000000014bb44315884345ebd2cedf744fd1ca4bf9a5f028a717cd98a5
Tx value: pi in 314159260; block 000000000000014bb44315884345ebd2cedf744fd1ca4bf9a5f028a717cd98a5
Tx value: pi in 314159260; block 00000000000000a9bff664c44189a726973d7c55396e47527cea78f5b32b5078

Edit 2: Rough try at Benford's Law:


I don't know how to measure how close that fits.  The 5's may be high because of block reward, which I've left in.  Transaction fees were counted as part of the block reward.  It would probably be best to ignore the block reward, and break out transaction fees individually.  I will do that later.  Also, not sure why 1's would be high -- maybe people sending around a Satoshi for kicks?

[keystroke]

Pretty cool

[hashman]

I second that "cool".  Thanks! 

Can you give us some addresses which contain sequential digits of pi or e or sqrt 2? 

The addresses 1111111111111111111114oLvT2 and 1QLbz7JHiBTspS962RLKV8GndWFwi5j6Qr are pubkey hashes 0 and (2^160)-1 respectively.

These are junk addresses right?  No privkey possible?  It might also be interesting to know how many coins are at such truly unreachable addresses.   

[scintill]

Nice idea!  There's a lot.  Doing the bignum calculations to search hashes may have been overkill, but I did find some stuff in there.  I've edited the OP to include my findings.

It just occurred to me that sending special values like this could decrease anonymity. When a person sees them, it's unlikely that the destination address is a change address, meaning in a typical two-output transaction one can tell which output belongs to the sender.

These are junk addresses right?  No privkey possible?  It might also be interesting to know how many coins are at such truly unreachable addresses.    

Yeah, maybe look for unlikely patterns in address hashes, like 0xa9a9a9a9a9... or something. Interesting.

I think they are possible and valid addresses, but the likelihood of someone having a random private key whose EC pair's RIPEMD160 hash was 0 or 2^160-1, is so low that they are probably fake.

[hashman]

Nice work!!  Very cool. 

If you can do that so quickly I bet you could also check to see if various TX amounts obey Benford's law. 

[scintill]

Nice work!!  Very cool. 

If you can do that so quickly I bet you could also check to see if various TX amounts obey Benford's law. 

Ha, that was my next idea, too!  That should be the easiest of all, except that certain things might need to be excluded (like fixed block rewards) -- does that make sense?

[hashman]

Nice work!!  Very cool. 

If you can do that so quickly I bet you could also check to see if various TX amounts obey Benford's law. 

Ha, that was my next idea, too!  That should be the easiest of all, except that certain things might need to be excluded (like fixed block rewards) -- does that make sense?

Yeah you could take out the fixed rewards but by now that's a pretty small fraction of all outputs, so it might be only a slight bump above the Benford's distribution for 1st significant digit of 5. 

I guess you could make a histogram of first sig. fig. for all outputs, all inputs, miner fees, or maybe some other combination.  The various hashes and nonces should give a normal distribution and not Benford's.  Change transactions as well as mixing service transactions might also change the output distribution.