Marin Mersenne 2^P-1
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MnStatusDetails
417961Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
19958663848175408108725132580.72008-12-12 22:47:31
ECM
DigitsB1Curves
2550000280 / 280
30250000301 / 640
Estimated T-Level: 27.4
TF below 2^86 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski40C30
Verified (Factored)Jens J Loesel3F27DBE226E5C0C30
Verified (Factored)Eivind Triel3F27DBE226E5C0C3193588
Verified (Factored)2002-03-10Dennis Pope3F27DBE226E5C0C3311137
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver Kruse2A85D1D6BDFF0F0C1013
Verified2017-11-02kkmrkkblmbrbk2A85D1D6BDFF0F0C133875013
Verified2020-04-18Oliver KruseE33BCBBB4889C2D3112594353
Verified2024-10-26kkmrkkblmbrbkE33BCBBB4889C2D3138720153
History
DateUserTypeResult
2024-10-26stenleiCERT
PRP Certification
Proof certified good
2024-10-26kkmrkkblmbrbkC-PRP
M417961/1995866384817540810872513 : E33BCBBB4889C2D3
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-18Oliver KruseC-PRP
M417961/1995866384817540810872513 : E33BCBBB4889C2D3
PRP: Verified
PRP without proof (small exponent)
2017-11-02kkmrkkblmbrbkC-PRP
M417961/1995866384817540810872513 : 2A85D1D6BDFF0F0C
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M417961/1995866384817540810872513 : 2A85D1D6BDFF0F0C
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=3000000, B2=100000000, E=12
2008-12-12Sturle SundeF-ECM
Factor: 1995866384817540810872513