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
61839119Factored
FactorDigitsBitsDate
217389277578820136205832374.22013-07-21 17:38:32
P-1 factors
DateFactorB1B2
2013-07-21217389277578820136205835800000
History
DateUserTypeResult
2022-03-29LordJuliusNF
no factor from 2^62 to 2^63
2013-07-21Jwb52zF-PM1
Factor: 21738927757882013620583
2013-02-18Jerry HallettNF
no factor from 2^72 to 2^73
2013-02-13monstNF
no factor from 2^71 to 2^72
2012-04-28XyzzyNF
no factor from 2^70 to 2^71
2012-04-28XyzzyNF
no factor from 2^69 to 2^70
2009-09-24wurkfurNF
no factor from 2^68 to 2^69
2009-02-19WorknPlayNF
no factor from 2^67 to 2^68
2009-02-17WorknPlayNF
no factor from 2^66 to 2^67
2009-02-16curtiscNF
no factor from 2^65 to 2^66
2009-02-13ANONYMOUSNF
no factor from 2^64 to 2^65
2009-02-09WorknPlayNF
no factor from 2^63 to 2^64