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
2779097Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
603175212891135.8old
558448891483075271755.62015-02-04 12:45:51
ECM
DigitsB1Curves
255000058 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21alpertron1DF39BE472387968222918453
Verified2017-11-15Oliver Kruse1DF39BE4723879682107360053
History
DateUserTypeResult
2022-12-03USAFSSNF-PM1
B1=320000, B2=261254070
2017-11-15Oliver KruseC-PRP
M2779097/60317521289/55844889148307527 : 1DF39BE472387968
PRP: Verified
PRP without proof (not generated)
2017-10-21alpertronC-PRP
M2779097/60317521289/55844889148307527 : 1DF39BE472387968
PRP: Verified
PRP without proof (not generated)
2015-02-04TJAOIF
Factor: 55844889148307527 / TF: 55-56