Bitcoin Mining Distribution Block: 220877 13 Feb 2013 Hashrate (in Difficulty units per second; 1 Difficulty unit == 4 GiHash): Total Chain 100.00% 5,255 Unknown 29.50% 1,550 50BTC 22.30% 1,172 SlushPool 15.83% 831 BTC Guild 14.39% 756 BitMinter 7.91% 415 OzCoin 4.32% 226 EclipseMC 2.88% 151 Eligius 1.44% 75 Mt Red 1.44% 75