Marin Mersenne 2^P-1
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MnStatusDetails
17998583Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
850945053276388959734572376.22024-10-13 06:39:40
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2003-07-21ParVe-ITE3D53016AFF9FFA412497311
Verified (Factored)2007-03-20John RothE3D53016AFF9FFA4452205
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2025-04-30PerigC049F24091215BF111292989053
P-1 factors
DateFactorB1B2
2024-10-13850945053276388959734572000000676712850
History
DateUserTypeResult
2025-04-30twmossCERT
PRP Certification
Proof certified good
2025-04-30PerigC-PRP
M17998583/85094505327638895973457 : C049F24091215BF1
PRP proof power = 8
PRP: Verified
Proof certified good
2024-10-13masserF-PM1
Factor: 85094505327638895973457 / (P-1, B1=2000000, B2=676712850)
2022-01-11TheJudgerNF
no factor from 2^73 to 2^74
2021-11-09Dylan DelgadoNF
no factor from 2^72 to 2^73
2021-02-01YxinityNF
no factor from 2^71 to 2^72
2019-08-30YxinityNF
no factor from 2^70 to 2^71
2018-03-11ramgeisNF
no factor from 2^68 to 2^69
2018-03-11ramgeisNF
no factor from 2^67 to 2^68
2018-03-01YxinityNF
no factor from 2^69 to 2^70
2018-03-01YxinityNF
no factor from 2^68 to 2^69
2018-03-01YxinityNF
no factor from 2^67 to 2^68
2014-08-19NesowaNF
no factor from 2^66 to 2^67