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
2277487Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
8579472493928471549.6old
9841654848680779271859.82015-12-14 12:03:36
ECM
DigitsB1Curves
2550000280 / 280
30250000128 / 640
Estimated T-Level: 26.0
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron94F37D2FD5B3DBDC2013
Verified2017-10-29Oliver Kruse94F37D2FD5B3DBDC229555813
History
DateUserTypeResult
2017-10-29Oliver KruseC-PRP
M2277487/857947249392847/984165484868077927 : 94F37D2FD5B3DBDC
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2277487/857947249392847/984165484868077927 : 94F37D2FD5B3DBDC
PRP: Verified
PRP without proof (not generated)
2016-04-07alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-14TJAOIF
Factor: 984165484868077927 / TF: 59-60