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

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Exponent Range:










MnStatusDetails
555671Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
77603364640001031652.8old
602945624288315452792065.72014-11-08 13:29:51
ECM
DigitsB1Curves
2550000280 / 280
30250000350 / 640
Estimated T-Level: 27.7
TF below 2^87 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver Kruse81D6E92D6E1237292013
Verified2017-11-04kkmrkkblmbrbk81D6E92D6E123729221783613
Verified2020-04-19Oliver Kruse2ACE66ED0DFAE8D624259153
Verified2024-12-29kkmrkkblmbrbk2ACE66ED0DFAE8D6222732253
P-1 factors
DateFactorB1B2
2014-11-0860294562428831545279150000050000000
History
DateUserTypeResult
2024-12-29LOBESCERT
PRP Certification
Proof certified good
2024-12-29kkmrkkblmbrbkC-PRP
M555671/7760336464000103/60294562428831545279 : 2ACE66ED0DFAE8D6
PRP proof power = 6
PRP: Verified
Proof certified good
2022-12-07USAFSSNF-PM1
B1=2000000, B2=6281645370
2020-04-19Oliver KruseC-PRP
M555671/7760336464000103/60294562428831545279 : 2ACE66ED0DFAE8D6
PRP: Verified
PRP without proof (small exponent)
2017-11-04kkmrkkblmbrbkC-PRP
M555671/7760336464000103/60294562428831545279 : 81D6E92D6E123729
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M555671/7760336464000103/60294562428831545279 : 81D6E92D6E123729
PRP: Verified
PRP without proof (not generated)
2014-11-08alpertronF-PM1
Factor: 60294562428831545279 / (P-1, B1=1500000, B2=50000000, E=12)