PiHex
PiHex was a distributed computing project to calculate specific bits of Pi. 1246 contributors used idle time slices on almost two thousand computers to make its calculations. They made use of Bellard's formula, a faster version of the BBP formula, with the algorithm discovered by Bailey, Borwein, and Plouffe in 1995. After setting three records—calculating the five trillionth bit, the forty trillionth bit, and the quadrillionth bit—PiHex has now finished.
External link The official PiHex site
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