Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
501617Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
6282329873892042186012169.12015-05-29 10:15:55
237634730858842104676826092684.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse70DCCDBCC914ED2D2013
Verified2017-10-13Oliver Kruse70DCCDBCC914ED2D234116813
Verified2017-12-17ATH70DCCDBCC914ED2D235540513
Verified2020-04-18Oliver Kruse046FD5160D8C89B726451853
Verified2024-12-05kkmrkkblmbrbk046FD5160D8C89B7230518553
History
DateUserTypeResult
2024-12-05saffahCERT
PRP Certification
Proof certified good
2024-12-05kkmrkkblmbrbkC-PRP
M501617/628232987389204218601/23763473085884210467682609 : 046FD5160D8C89B7
PRP proof power = 6
PRP: Verified
Proof certified good
2022-12-13USAFSSNF-PM1
B1=2000000, B2=7126604940
2020-04-18Oliver KruseC-PRP
M501617/628232987389204218601/23763473085884210467682609 : 046FD5160D8C89B7
PRP: Verified
PRP without proof (small exponent)
2017-12-17ATHC-PRP
M501617/628232987389204218601/23763473085884210467682609 : 70DCCDBCC914ED2D
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M501617/23763473085884210467682609/628232987389204218601 : 70DCCDBCC914ED2D
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M501617/23763473085884210467682609/628232987389204218601 : 70DCCDBCC914ED2D
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M501617/23763473085884210467682609/628232987389204218601 : 70DCCDBCC914ED2D
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=1500000, B2=50000000, E=12
2015-05-29TJAOIF-ECM
Factor: 628232987389204218601 / (ECM curve 99, B1=50000, B2=5000000)