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
977218691Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
254076859671134.62008-06-01 01:29:20
28581353922168428171961.32015-12-23 16:12:47
History
DateUserTypeResult
2015-12-23ConductorF
Factor: 2858135392216842817 / TF: 1-62