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
871513Factored
FactorDigitsBitsDate
222104534820868309212064.32007-09-06 10:17:00
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28Oliver Kruse20138075CEAEC5521013
Verified2017-10-14Oliver Kruse20138075CEAEC552144749613
Verified2017-12-19ATH20138075CEAEC552133115113
Unverified (Reliable)2020-04-22Oliver KruseF5CE32F3FB6A2D__148068853
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^59
2020-04-22Oliver KruseC-PRP
M871513/22210453482086830921 : F5CE32F3FB6A2D__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-19ATHC-PRP
M871513/22210453482086830921 : 20138075CEAEC552
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M871513/22210453482086830921 : 20138075CEAEC552
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M871513/22210453482086830921 : 20138075CEAEC552
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2007-09-06Chad DavisF-ECM
Factor: 22210453482086830921