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

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MnStatusDetails
2807927Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
22463417824.4old
ECM
DigitsB1Curves
255000079 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver Kruse53BFC4A94762AA4F195357053
Verified2017-12-06kkmrkkblmbrbk53BFC4A94762AA4F1160619653
History
DateUserTypeResult
2022-08-20USAFSSNF-PM1
B1=288000, B2=226423890
2017-12-06kkmrkkblmbrbkC-PRP
M2807927/22463417 : 53BFC4A94762AA4F
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2807927/22463417 : 53BFC4A94762AA4F
PRP: Verified
PRP without proof (not generated)