Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
647420617Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2068535780187588494412167.52016-09-03 22:57:33
History
DateUserTypeResult
2016-09-03NipalF
Factor: 206853578018758849441 / TF: 67-70
2014-06-17sasakiNF
no factor from 2^66 to 2^67
2014-03-19america64NF
no factor from 2^65 to 2^66