Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4174949Factored
FactorDigitsBitsDate
65558233140942350631962.52009-12-01 04:47:01
12137118064368949558447672580.02023-01-25 17:26:39
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)Dax PratherF14D78F90B5DC2EF0
Verified (Factored)1999-12-08Noel D'SouzaF14D78F90B5DC2EF1898659
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-20kkmrkkblmbrbkBC8D555AF23C3D831013
Verified (Factored)2018-01-16Chang Chia-TcheBC8D555AF23C3D831340895613
Verified2023-01-31Perig0F6EEC6826056A2C2298667453
P-1 factors
DateFactorB1B2
2023-01-251213711806436894955844767337000227966310
History
DateUserTypeResult
2023-01-31]mh[ VirtekCERT
PRP Certification
Proof certified good
2023-01-31PerigC-PRP
M4174949/6555823314094235063/1213711806436894955844767 : 0F6EEC6826056A2C
PRP proof power = 7
PRP: Verified
Proof certified good
2023-01-25USAFSSF-PM1
Factor: 1213711806436894955844767 / (P-1, B1=337000, B2=227966310)
2018-01-16Chang Chia-TcheC-PRP
M4174949/6555823314094235063 : BC8D555AF23C3D83
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4174949/6555823314094235063 : BC8D555AF23C3D83
PRP: Verified (Factored)
PRP without proof (not generated)
2009-12-01Aca ArsovF-ECM
Factor: 6555823314094235063
2009-08-03Carsten KossendeyNF-PM1
B1=25000, B2=337500