For everyone who didn't get it yet: 50BTC is a scam pool. Don't mine on 50btc.com. They will keep all your BTC.

Please see

https://bitcointalk.org/index.php?topic=54673.msg3419575#msg3419575

and

https://bitcointalk.org/index.php?topic=54673.msg3422015#msg3422015

for all known pool wallet addresses of 50BTC. Most interesting transaction is the following one, from March this year, where 45,000 BTC were transferred from the address used as the cold wallet for 50BTC to some new address.

https://blockchain.info/tx/b05d60f9d878c60613097dfedf36d839855c4bc555d3f0d537eb9240aff2105b

However it looks like the owner of 50BTC did have quite a mining farm himself and already did mining on other pools before 50BTC was created, I cannot judge how much of these 45K BTC does belong to the pool owner and how much belongs to 50BTC customers.

59 BTC missing here.

A friend of mine lives in Frankfurt and checked out the building for me. No indication of a company named Xtreme Miners or Jorge Berg whatsoever.

Hat denn schon jemand in Erfahrung gebracht, wer der Betreiber von 50BTC.com ist? Ich habe auch eine erhebliche Anzahl BTC noch
dort liegen.

Did anybody already found out who the owner of 50btc.com is? All I know is he transferred 45000 BTC from the 50btc cold wallet to some other address in March this year. I hope for him, he did not sell these in March, before the peak, but transferred it to another address also belonging to him.

My last post for today, I hope at least some of you find the information valuable.... look what Google returned for this bitcoin address:

For example, on March 30th 2013 the 3rd richest bitcoin address 1Co6UHJmGHevWEHAPraSPRVkfGgG46EHwe moved the lions share of funds, 45,000K+ BTC, to a new address 17UUsmejDsjJEtbRcotd289ADp7ZdanH5k (making it the 2nd richest bitcoin address). The majority of BTC sat in 1Co6U for about 6 months. Slowly accumulating from middle 2012 until end of 2012 by what appears to be mining operations.

http://vongesell.wordpress.com/2013/05/25/bitcoin-days-destroyed-post-april-bubble-retrospective/

I have found another interesting bitcoin address.... this seems to be kind of the cold wallet for 50BTC.

http://blockchain.info/address/1Co6UHJmGHevWEHAPraSPRVkfGgG46EHwe

It was used to equalize the balance on the other address

http://blockchain.info/address/1JVQw1siukrxGFTZykXFDtcf6SExJVuTVE

posted before where block rewards were collected and payouts were coming from. When the hot wallet balance was too high, bitcoins were withdrawn, when it got low bitcoins were sent. However in the last two month, there wasn't a lot to withdraw, but they needed to add funds to the hot wallet several times to keep it balanced, see transactions

10/17/2013 - 200 BTC - http://blockchain.info/tx/b4759c2afd33a054ebe3abca7b5950e3e01907705f55290486cc206aa99f0a3f
10/11/2013 - 200 BTC - http://blockchain.info/tx/0b3a089cac27461e0ff23bae3f8b9077dc387695a8c577c32867b74f2bc95393
9/27/2013 - 181 BTC - http://blockchain.info/tx/1674f8d33afb0ae9044ed80176de5c930c8c13c08222752088de208dc4f265d6
9/25/2013 - 200 BTC - http://blockchain.info/tx/cab3a14fa99061789faa9ce7ef302cc037a06354f42168be0f8e52d47db4450f
9/18/2013 - 300 BTC - http://blockchain.info/tx/fbe74561818642a54a0e0f73fb95afd5f43e8c2589bb4825781e8c53f370481d
9/16/2013 - 300 BTC - http://blockchain.info/tx/0c013ba89cdf434839ae31ec73f3bd7cb81e30be4a5d9a3c9fdd6015c2759603
9/13/2013 - 400 BTC - http://blockchain.info/tx/0ab28ee44fb7689c26873b3049b1622ff5d6961285d5b3e641f9309774a1d216
9/11/2013 - 400 BTC - http://blockchain.info/tx/08abd121f15a25e5d64b000bf62b315927db9fafc0ecc5acbbca0beba53703bc

So they were paying out more than they received as block rewards for several weeks. I still hope there are enough BTC available from the better times of 50BTC to make a payout of all the open balances. Once they are restored ;-)

I don't know. When I saw the buggy balances, I thought some hacker was able to manipulate the paid out sum to be able to do huge payouts to get as much as possible of the pool wallet. However neither did 50BTC post such transactions, nor have I been able find them. It rather looks like the pool wallet already was empty before the balances got corrupted.

Perhaps the system was not prepared for such an underflow of the pool wallet and did react in an unexpected way? Perhaps this happened when they tried to adapt the system to support DGM? I guess 50BTC needs to shed some more light on this. After all I do just look at the blockchain and take some guesses.

Take a look at the links... they are referring to an attack last year (October 2012) and seem to be unrelated to the current hack.

I looked at the charts and transactions intensively and couldn't find any extraordinary transactions which may be related to an attack. Quite contrary, it looks like the pool wallet slowly starved out over the last two month until it was down to 0 BTC on the 17th.

Given the fact that the pool operators couldn't find any flaw in their billing system I think it could have been victim of a block solution withholding attack. On a PPS pool the damage of block solution withholding fully affects the pool owners, so a group of miners with enough hashing power (10% of the pool hashrate, so about 10 TH/s for 50BTC) would cause the pool to lose money over time, without having any loss themselves, as they get paid per share, even if they prevent block solutions to be sent to the pool.

This seems to be address used by 50BTC since April this year

http://blockchain.info/address/1JVQw1siukrxGFTZykXFDtcf6SExJVuTVE

and this is another temporary one, which was used on the 18th October

http://blockchain.info/address/121Tk3oKDU3GHWeCRnxguzeeM7Tm3XvUns

before they switched to the one posted before

http://blockchain.info/address/198i5jrY1B4xGnQwbiDVuQzcq17thzaH1s


Here are some older pool addresses since August 2012:

April 2013 to October 2013: http://blockchain.info/address/1JVQw1siukrxGFTZykXFDtcf6SExJVuTVE
December 2012 to April 2013: http://blockchain.info/address/145UHBQAmGRpdsXVKhdHtFndnJ8XN8fLjq
October 2012 to December 2012: http://blockchain.info/address/151z2eoe2D9f6cohGNNU96GsKAqLfYP8mN
August 2012 to October 2012: http://blockchain.info/address/13XgASZP7N6pTMeyS5Sq8JeuCAkNzefnT7

If this address really is related to 50BTC, this is the address they configured AFTER the attack and only contains all blocks solved after the hack. If someone could find the address used BEFORE the attack it would be much more interesting to see the amount of BTC and what happened to it.

It is not completely dead yet.... some pages still work, just all the personal account pages are blanked out. I guess this is done intentionally to avoid more flooding with bad payout requests and support messages.

For sure whining and going their nerves with useless messages and mails isn't going to help. I hope they are still trying to fix the data and do payouts when they have been able to. After all they are from Russia and have a lot of Russian customers. I wouldn't dare to take the money and run away in Russia.

This is a page, which still is active: https://50btc.com/analytics

Why should they have done so? At 120 TH/s the pool still generated about 220 BTC per day, so the 3% PPS were about $40k per month for the pool at current exchange rates.

I guess the more interesting question is, if they really have lost all bitcoins in the pool wallet, do they have any interest in restoring the balances?

Ich wollte den eigentlich sofort bestellen wenn er rauskommt. Nachdem ich das Video gesehen habe, bin ich etwas nachdenklich geworden.

Site is still down for me (502 Bad Gateway), but mining seems to work.

I tried the voltmod today on my 1.15y. Works like a charm. Went from 216 to 232 after raising the voltage to 1.32V. Also tried 1.4V for a short time, which gave me

001-0: ztex_ufm1_15y1-04A36E42D1-4: f=248.00MHz,  errorRate=0.00%,  maxErrorRate=0.00%,  hashRate=248.0MH/s,  submitted 13 new nonces,  luckFactor=0.66

Now I am thinking about watercooling, also because of the noise reduction and about recompiling BTCMiner to allow higher frequencies ;-)