33.333 - 33.072 = 0.261 % 0.261 % of 2 ^ 64 = 4.815 x 10 ^ 16 keys. Let's say I do 1000 blocks a day; 4.815 x 10 ^ 16 / 2 ^ 28 (one block) = 1.794 x 10 ^ 8 blocks. It would take me 491 years to complete that ! So we are not quite on one third of the project We WILL be in approx. 1.794 x 10 ^ 8 / 40 x 10 ^ 6 = 4.5 days (Assuming all RC5 participants together do about 40 million blocks a day...)