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

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MnStatusDetails
121288243Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
18713428392784886281454685772890.62024-03-02 13:40:41
P-1 factors
DateFactorB1B2
2024-03-021871342839278488628145468577907000422238960
History
DateUserTypeResult
2024-03-02Dmitry BolshakovF-PM1
Factor: 1871342839278488628145468577 / (P-1, B1=907000, B2=422238960)
2022-06-22TheJudgerNF
no factor from 2^76 to 2^77
2021-08-20TheJudgerNF
no factor from 2^75 to 2^76
2021-08-16gcardonaNF
no factor from 2^74 to 2^75
2021-07-05SRBaseNF
no factor from 2^73 to 2^74
2020-10-28SRBaseNF
no factor from 2^72 to 2^73
2015-05-30SMoffatNF
no factor from 2^71 to 2^72
2015-05-23SMoffatNF
no factor from 2^70 to 2^71
2013-11-22GrunwalderGIMPNF
no factor from 2^69 to 2^70
2013-11-22GrunwalderGIMPNF
no factor from 2^68 to 2^69
2013-11-22GrunwalderGIMPNF
no factor from 2^66 to 2^68
2012-08-17RichardNF
no factor from 2^65 to 2^66
2010-10-21Torchwood InstituteNF
no factor from 2^64 to 2^65
2010-05-18OS1NF
no factor from 2^63 to 2^64