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

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MnStatusDetails
156419167Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
562127280871013722737149112685.52025-09-13 22:44:10
P-1 factors
DateFactorB1B2
2025-09-135621272808710137227371491186600081098094
History
DateUserTypeResult
2025-09-13Ryan PropperF-PM1
Factor: 56212728087101372273714911 / (P-1, B1=866000, B2=81098094)
2025-05-29fre_gamesNF
no factor from 2^77 to 2^78
2024-12-02zhangstNF
no factor from 2^76 to 2^77
2024-08-19SRBaseNF
no factor from 2^75 to 2^76
2023-02-18SRBaseNF
no factor from 2^74 to 2^75
2021-11-16SRBaseNF
no factor from 2^73 to 2^74
2018-08-18David HruskaNF
no factor from 2^72 to 2^73
2018-05-25David HruskaNF
no factor from 2^71 to 2^72
2018-02-23proxy2222NF
no factor from 2^70 to 2^71
2017-11-04La GüiraNF
no factor from 2^69 to 2^70
2017-03-08XolotlNF
no factor from 2^68 to 2^69
2016-05-07DerekNF
no factor from 2^67 to 2^68
2015-04-15guruNF
no factor from 2^66 to 2^67
2013-02-07Charles A. MorrisNF
no factor from 2^65 to 2^66
2011-01-25sasaki3NF
no factor from 2^64 to 2^65