Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
207284221Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
852587095673922728812066.22015-10-20 17:15:12
History
DateUserTypeResult
2015-10-20ConductorF
Factor: 85258709567392272881 / TF: 66-67
2013-08-03Grant McCrackenNF
no factor from 2^65 to 2^66
2011-05-11Charles A. MorrisNF
no factor from 2^64 to 2^65