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Primecoin
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Primecoin - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Primecoin
Primecoin (sign: Ψ; code: XPM) is a peer-to-peer open source cryptocurrency that implements a scientific computing proof-of-work system. Primecoin's ...
bitcointalk discussion
[XPM] [ANN] Primecoin Release - First Scientific Computing ...
primecoin – Reddit
primecoin/primecoin · GitHub