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

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MnStatusDetails
21399953Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
303771518400742991578839147112994.62023-08-06 15:07:54
LL
StatusDateUserResidueShift
Verified (Factored)2004-07-02Ars Technica Team Prime RibE49F117468E0B06C14902380
Verified (Factored)2008-10-28Oleg V.CatE49F117468E0B06C19459780
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-08-06James Heinrich1BEF465FB28079F11384711653
P-1 factors
DateFactorB1B2
2023-08-063037715184007429915788391471112180001584027900
History
DateUserTypeResult
2023-08-06curtiscCERT
PRP Certification
Proof certified good
2023-08-06James HeinrichC-PRP
M21399953/30377151840074299157883914711 : 1BEF465FB28079F1
PRP proof power = 8
PRP: Verified
Proof certified good
2023-08-06James HeinrichF-PM1
Factor: 30377151840074299157883914711 / (P-1, B1=1218000, B2=1584027900)
2021-11-05Sid & AndyNF
no factor from 2^74 to 2^75
2021-10-24TheJudgerNF
no factor from 2^73 to 2^74
2021-10-24TheJudgerNF
no factor from 2^72 to 2^73
2021-10-01-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-15SRBaseNF
no factor from 2^70 to 2^71
2018-05-03ramgeisNF
no factor from 2^69 to 2^70
2017-12-22VictordeHollanderNF
no factor from 2^68 to 2^69
2017-04-24ramgeisNF
no factor from 2^67 to 2^68
2014-11-20BloodIceNF
no factor from 2^66 to 2^67
2008-10-28Oleg V.CatC-LL
E49F117468E0B06C