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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Exponent Range:










MnStatusDetails
1355131Factored
FactorDigitsBitsDate
27258514263410139771961.22011-05-09 14:44:10
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel86AEF1C348C93FA10
Verified (Factored)Cornelius Caesar86AEF1C348C93FA10
Verified (Factored)Brian J. Beesley86AEF1C348C93FA11059733
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30Oliver Kruse560AE634AE75ED0F1013
Verified2017-10-24kkmrkkblmbrbk560AE634AE75ED0F125416013
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-10-24kkmrkkblmbrbkC-PRP
M1355131/2725851426341013977 : 560AE634AE75ED0F
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1355131/2725851426341013977 : 560AE634AE75ED0F
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2011-05-09XyzzyF-ECM
Factor: 2725851426341013977
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61