Marin Mersenne 2^P-1
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MnStatusDetails
12830669Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
66577274336100917838712272.52021-12-20 12:58:25
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-08-04Joseph Chen63A867B10D508D381655587
Verified (Factored)2004-10-18Thad Stump63A867B10D508D389168637
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-05-15Poao5B6E46F9C72E15CB1683645853
P-1 factors
DateFactorB1B2
2021-12-206657727433610091783871500000513753240
History
DateUserTypeResult
2022-05-15Ben DeloCERT
PRP Certification
Proof certified good
2022-05-15PoaoC-PRP
M12830669/6657727433610091783871 : 5B6E46F9C72E15CB
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-20LuminescenceF-PM1
Factor: 6657727433610091783871 / (P-1, B1=500000, B2=513753240)
2021-05-24ZacHFXNF
no factor from 2^71 to 2^72
2021-05-24ZacHFXNF
no factor from 2^70 to 2^71
2021-05-24ZacHFXNF
no factor from 2^69 to 2^70
2021-05-24ZacHFXNF
no factor from 2^66 to 2^67
2021-05-24ZacHFXNF
no factor from 2^65 to 2^66
2021-05-24ZacHFXNF
no factor from 2^64 to 2^65
2021-05-24ZacHFXNF
no factor from 2^20 to 2^64
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2015-06-17ThaNF-PM1
B1=300000, B2=6000000, E=12
2015-04-09ThaNF
no factor from 2^66 to 2^67
2014-04-27NesowaNF
no factor from 2^65 to 2^66
2013-06-03lycornNF
no factor from 2^64 to 2^65