AngelusWebDesign


June 22, 2011, 03:37:01 AM 

It does seem that some real power is being added to the system. More than a few cards.







Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.



interfect


June 22, 2011, 04:34:59 AM 

It does seem that some real power is being added to the system. More than a few cards.
I heard from my friend at RIT that someone had hacked (?) into their computing cluster and was using it to mine Bitcoins. I'm not sure if they have GPUs set up for that, and I think it happened earlier in the day. So maybe it's something else?




fcmatt
Legendary
Offline
Activity: 1092


June 22, 2011, 04:45:01 AM 

Does nobody understand statistics and probabilities here?
Would you say a roulette wheel was rigged if it came up black 10 times in a row? Even worse, would you bet heavily on red for the next spin?
Every single block generation is a separate occurrence, estimates of total hashing speed are based on a very simple formula for average time to solve a block over X number of blocks vs current difficulty. A lucky string or two of quickly solved blocks will make it look like hashing power went through the roof. An unlucky string of blocks taking an hour to solve would make it look like hashing power dropped off considerably.
it seems people take well to casino examples.. here is one about the martingale betting strategy and roulette. taken from wikipedia. The odds of losing a single spin at roulette are q = 20/38 = 52.6316%. If you play a total of 6 spins, the odds of losing 6 times are q6 = 2.1256%, as stated above. However if you play more and more spins, the odds of losing 6 times in a row begin to increase rapidly. In 73 spins, there is a 50.3% chance that you will at some point have lost at least 6 spins in a row. (The chance of still being solvent after the first six spins is 0.978744, and the chance of becoming bankrupt at each subsequent spin is (10.526316)x0.021256 = 0.010069, where the first term is the chance that you won the (n6)th spin  if you had lost the (n6)th spin, you would have become bankrupt on the (n1)th spin. Thus over 73 spins the probability of remaining solvent is 0.978744 x (10.010069)^67 = 0.49683, and thus the chance of becoming bankrupt is 10.49683 = 50.3%.) Similarly, in 150 spins, there is a 77.2% chance that you will lose at least 6 spins in a row at some point. And in 250 spins, there is a 91.1% chance that you will lose at least 6 spins in a row at some point.




phillipsjk
Legendary
Offline
Activity: 1008
Let the chips fall where they may.


June 22, 2011, 05:43:44 AM 

I think the block solve rate can likely be approximated by a Poisson distibution, where λ is equal to about 6 expected blocks per hour.(assuming no difficulty increase). Entering the values into the formula, I get a probability of 0.04130 that 10 blocks are solved in a given hour. 4.1% is not an exceedingly rare event, likely happening every day (more precisely, every 24 hours, 12 minutes on average).

James' OpenPGP public key fingerprint: EB14 9E5B F80C 1F2D 3EBE 0A2F B3DE 81FF 7B9D 5160



imperi


June 22, 2011, 05:45:47 AM 

I think the block solve rate can likely be approximated by a Poisson distibution, where λ is equal to about 6 expected blocks per hour.(assuming no difficulty increase). Entering the values into the formula, I get a probability of 0.04130 that 10 blocks are solved in an hour. 4.1% is not an exceedingly rare event, likely happening every day (more precisely, every 24 hours, 12 minutes on average). But what is the probability of 7 blocks in 10 minutes?




phillipsjk
Legendary
Offline
Activity: 1008
Let the chips fall where they may.


June 22, 2011, 06:01:42 AM 

But what is the probability of 7 blocks in 10 minutes?
To check a smaller interval, you would need to adjust λ to match. In this case a λ of 1 occurrence per 10 minute interval is equivalent to 6 in an hour used earlier. You then use a value of k=7 occurrences during that time. That works out to a probability of 7.30x10^ ^{5}. I would expect an occurrence like that to happen (on average (can the Poisson distribution be applied recursively?)) once every 95 days or so.

James' OpenPGP public key fingerprint: EB14 9E5B F80C 1F2D 3EBE 0A2F B3DE 81FF 7B9D 5160



MeSarah


June 22, 2011, 06:15:17 AM 

This is probably really stupid even wondering this but I thought I'd mention it anyway. I saw this on youtube yesterday: http://www.youtube.com/watch?v=eNcOcan1B2c. I flagged it as spam/scam because... well, duh. Surely it's not true... !!?! I saw this video too. I thought about making a post about it. But after looking at the video it just looks like a photoshop hack. Or maybe someone changed the code in the miner to that it would appear that to have a speed increase. Its fake, no worries.

60 GH/s BFL Single SC  PreOrder Yours Today!`````` Only $1299.99  butterflylabs.com ``````



einsteinx2
Newbie
Offline
Activity: 27


June 22, 2011, 06:38:49 AM 

It looks like a statistical anomaly as others have suggested. I'm in the btcguild pool, and we found 8 blocks in a one hour period earlier (according to btcguild our luck in the past 24 hours is +27.3%) but our pool is still at only a bit over 2 t/hashes. I expect to see that number on bitcoincharts.com drop significantly tomorrow unless the lucky streak continues. I really doubt 5 new thashes/s of processing power came online at just about the same time we had our crazy lucky streak





BombaUcigasa
Legendary
Offline
Activity: 1386


June 22, 2011, 02:29:41 PM 

Not only the whole network go up in speed, but even existing miners have increased in output. I got in less than 24 hours, double my daily return (even the one calculated at 10 blocks/hour).




Yeti
Member
Offline
Activity: 112
Firstbits: 1yetiax


June 22, 2011, 02:37:03 PM 

Yeah, me too. I call "luck streak", not "government supercluster takeover end of world".




Thanak
Jr. Member
Offline
Activity: 36


June 22, 2011, 02:38:43 PM 

Maybe a large corp decided to devote some processing time to mine and pile some coin as an investement

If can teach Go/Weichi/Baduk for BTC  I'm 1 kyu on KGS  0.2 BTC for one hour lesson, 0.1 BTC for a game review  mail at Baduk4Bitcoin@gmail.com



eleuthria
Legendary
Offline
Activity: 1750
BTC Guild Owner


June 22, 2011, 02:41:35 PM 

I know last night, BTC Guild alone found 8 blocks in a 1 hour period, start to finish (9 if you count the one that finished at the start of the hour). That was at ~2.3 TH/sec. I know a few other pools had some similar luck overnight.
I'd wait a while before I start claiming a massive jump in overall network speed, considering that 1 hour alone for BTC Guild was equivalent to what would take 4 hours on average.




einsteinx2
Newbie
Offline
Activity: 27


June 22, 2011, 07:15:26 PM 

As of right now, Bitcoin charts is listing 10.859 Thash/s. So it looks like it was just a lucky streak.





beeph
Jr. Member
Offline
Activity: 42


June 23, 2011, 05:24:11 AM 

lol and the IT crackdowns begin... across the country IT workers lose high paying jobs and get sued for theft of company resources cuz they tried to mine a 100$ worth of bitcoins.




lacedwithkerosene


June 23, 2011, 06:52:39 AM 

lol and the IT crackdowns begin... across the country IT workers lose high paying jobs and get sued for theft of company resources cuz they tried to mine a 100$ worth of bitcoins.
Just became a new addiction criteriaRe:OP : Yes, just a temporary increase from good mining luck. Nice to know. But hashing power is still rising by the day. That's some good hash!




