Marin Mersenne 2^P-1
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MnStatusDetails
11615579Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1287803725785725391612166.82016-01-15 21:22:31
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)2001-04-08Timo Aaltonen and friendsDB128BFC7E39E0EB5802252
Verified (Factored)2005-01-20Shane SanfordDB128BFC7E39E0EB3837172
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-09-19mrhA65F55168CBC4F411277832853
History
DateUserTypeResult
2025-06-06yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-05yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-28yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-11yuriy_5-1NF-PM1
B1=6969342, B2=448721460
2024-08-21yuriy_5-1NF-PM1
B1=2800000, B2=5499082050
2021-09-19Chad Steenerson CERT
PRP Certification
Proof certified good
2021-09-19mrhC-PRP
M11615579/128780372578572539161 : A65F55168CBC4F41
PRP proof power = 8
PRP: Verified
Proof certified good
2016-01-15VictordeHollanderF
Factor: 128780372578572539161 / TF: 66-67
2015-05-02Sid & AndyNF-PM1
B1=125000, B2=2187500, E=6
2014-12-20NesowaNF
no factor from 2^65 to 2^66
2013-11-05lycornNF
no factor from 2^64 to 2^65