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
2770199Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1381021822475991547.0old
ECM
DigitsB1Curves
255000061 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver Kruse121C35CF02CBD6251153396053
Verified2017-12-06kkmrkkblmbrbk121C35CF02CBD6251241989853
History
DateUserTypeResult
2022-11-30USAFSSNF-PM1
B1=320000, B2=261254070
2017-12-06kkmrkkblmbrbkC-PRP
M2770199/138102182247599 : 121C35CF02CBD625
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2770199/138102182247599 : 121C35CF02CBD625
PRP: Verified
PRP without proof (not generated)