Please learn from the project at riecoin.org Latest news: "Last week, Riecoin – a project that doubles as decentralized virtual currency and a distributed computing system - quietly broke the record for the largest prime number sextuplet. This happened on November 17, 2014 at 19:50 GMT and the calculation took only 70 minutes using the massive distributed computing power of its network. This week the feat was outdone and the project beat its own record on November 24, 2014 at 20:28 GMT achieving numbers 654 digits long, 21 more than its previous record."