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
121217389Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
211600238687337908472566427372994.12024-01-30 08:59:03
P-1 factors
DateFactorB1B2
2024-01-3021160023868733790847256642737909000376293060
History
DateUserTypeResult
2024-01-30Dmitry BolshakovF-PM1
Factor: 21160023868733790847256642737 / (P-1, B1=909000, B2=376293060)
2022-06-22TheJudgerNF
no factor from 2^76 to 2^77
2021-08-111997rj7NF
no factor from 2^75 to 2^76
2021-08-06rduerrNF
no factor from 2^74 to 2^75
2021-07-06SRBaseNF
no factor from 2^73 to 2^74
2020-10-28SRBaseNF
no factor from 2^72 to 2^73
2016-04-23QingkongNF
no factor from 2^71 to 2^72
2015-10-08bunddogNF
no factor from 2^70 to 2^71
2014-04-14GrunwalderGIMPNF
no factor from 2^69 to 2^70
2014-04-14GrunwalderGIMPNF
no factor from 2^68 to 2^69
2014-04-14GrunwalderGIMPNF
no factor from 2^66 to 2^68
2012-08-10Mr-PlonkNF
no factor from 2^65 to 2^66
2010-10-21sasaki3NF
no factor from 2^64 to 2^65
2010-05-18sasaki3NF
no factor from 2^63 to 2^64