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

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MnStatusDetails
61827253Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
156487791606521429173612373.72013-03-12 04:28:07
P-1 factors
DateFactorB1B2
2013-03-121564877916065214291736158500011553750
History
DateUserTypeResult
2022-03-29LordJuliusNF
no factor from 2^62 to 2^63
2013-03-12James HeinrichF
Factor: 15648779160652142917361
2013-03-02monstNF
no factor from 2^72 to 2^73
2013-02-11Jerry HallettNF
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
2009-10-09Sturle SundeNF
no factor from 2^68 to 2^69
2009-10-06Sturle SundeNF
no factor from 2^67 to 2^68
2009-10-04Dr. NowakNF
no factor from 2^66 to 2^67
2009-09-29Dr. NowakNF
no factor from 2^65 to 2^66
2009-02-11Trace McVeraNF
no factor from 2^64 to 2^65
2009-02-09ANONYMOUSNF
no factor from 2^63 to 2^64