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
975728557Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
58543713431032.42008-06-01 00:30:58
28497782754458035611961.32015-12-30 20:08:29
History
DateUserTypeResult
2015-12-30ConductorF
Factor: 2849778275445803561 / TF: 1-62