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
2279491Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
788503108432731446.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000129 / 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
Verified2017-10-11Oliver KruseDDDC6B75531002701013
Verified2017-11-22kkmrkkblmbrbkDDDC6B7553100270173845613
History
DateUserTypeResult
2017-11-22kkmrkkblmbrbkC-PRP
M2279491/78850310843273 : DDDC6B7553100270
PRP: Verified
PRP without proof (not generated)
2017-10-11Oliver KruseC-PRP
M2279491/78850310843273 : DDDC6B7553100270
PRP: Verified
PRP without proof (not generated)
2016-04-09alpertronNF-PM1
B1=500000, B2=15000000, E=12