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

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MnStatusDetails
161605681Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
409235920508688668353992375.12024-08-29 11:37:16
History
DateUserTypeResult
2025-06-05GregF
Factor: 40923592050868866835399 / TF: 75-76
2024-08-29SRBaseF
Factor: 40923592050868866835399 / TF: 75-76*
2023-03-04SRBaseNF
no factor from 2^74 to 2^75
2021-11-29SRBaseNF
no factor from 2^73 to 2^74
2019-12-08proxy2222NF
no factor from 2^72 to 2^73
2019-04-07proxy2222NF
no factor from 2^71 to 2^72
2018-06-26ZenghuiNF
no factor from 2^70 to 2^71
2018-06-09proxy2222NF
no factor from 2^69 to 2^70
2017-03-28XolotlNF
no factor from 2^68 to 2^69
2016-03-23XZTNF
no factor from 2^67 to 2^68
2015-05-07nikoszNF
no factor from 2^66 to 2^67
2013-03-03RichardNF
no factor from 2^65 to 2^66
2011-02-03dslNF
no factor from 2^64 to 2^65
2010-06-30Torchwood InstituteNF
no factor from 2^63 to 2^64