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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1915817Factored
FactorDigitsBitsDate
57474511825.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000126 / 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
Verified2017-09-30alpertron5E4D12D0C6680ECE1013
Verified2017-10-20Oliver Kruse5E4D12D0C6680ECE190283213
History
DateUserTypeResult
2017-10-20Oliver KruseC-PRP
M1915817/57474511 : 5E4D12D0C6680ECE
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1915817/57474511 : 5E4D12D0C6680ECE
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12