Marin Mersenne 2^P-1
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MnStatusDetails
15373847Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1662249449481625429044343507433097.12021-01-23 16:46:39
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)2003-02-24Ari Mutala91169071C1E862421070327
Verified (Factored)2006-06-13Ars Technica Team Prime Rib91169071C1E8624212041872
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-07-24PerigBB4C91717DE1AF6811294112853
P-1 factors
DateFactorB1B2
2021-01-23166224944948162542904434350743120000085200000
History
DateUserTypeResult
2023-07-24Richard ThomasCERT
PRP Certification
Proof certified good
2023-07-24PerigC-PRP
M15373847/166224944948162542904434350743 : BB4C91717DE1AF68
PRP proof power = 8
PRP: Verified
Proof certified good
2021-01-23ThaF-PM1
Factor: 166224944948162542904434350743 / (P-1, B1=1200000, B2=85200000)
2018-03-15ramgeisNF
no factor from 2^68 to 2^69
2018-03-15ramgeisNF
no factor from 2^67 to 2^68
2014-04-21NesowaNF
no factor from 2^66 to 2^67
2014-04-21NesowaNF
no factor from 2^65 to 2^66