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
658837Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
61930679825.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000330 / 640
Estimated T-Level: 27.6
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 Kruse1DB562EE2E7E62EB1013
Verified2017-09-28Oliver Kruse1DB562EE2E7E62EB1013
Verified2017-11-09kkmrkkblmbrbk1DB562EE2E7E62EB153359013
Verified2020-04-19Oliver KruseD046814B003E7EB8158187653
Verified2025-02-21kkmrkkblmbrbkD046814B003E7EB8134463153
History
DateUserTypeResult
2025-02-21ANONYMOUSCERT
PRP Certification
Proof certified good
2025-02-21kkmrkkblmbrbkC-PRP
M658837/61930679 : D046814B003E7EB8
PRP proof power = 6
PRP: Verified
Proof certified good
2024-08-23cramsey87NF-PM1
B1=6500000, B2=46153758420
2020-04-19Oliver KruseC-PRP
M658837/61930679 : D046814B003E7EB8
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M658837/61930679 : 1DB562EE2E7E62EB
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M658837/61930679 : 1DB562EE2E7E62EB
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M658837/61930679 : 1DB562EE2E7E62EB
PRP: Verified
PRP without proof (not generated)