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
2039761Factored
FactorDigitsBitsDate
554732442384419168812065.62009-10-16 11:09:08
ECM
DigitsB1Curves
2550000137 / 280
Estimated T-Level: 22.4
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Johan ViljoenCA4DA7487A50CFC00
Verified (Factored)1999-01-29John RaboldCA4DA7487A50CFC01866178
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-06Oliver KruseC026C7393DB86D481013
Verified2017-11-14ATHC026C7393DB86D481151262413
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-11-14ATHC-PRP
M2039761/55473244238441916881 : C026C7393DB86D48
PRP: Verified
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2039761/55473244238441916881 : C026C7393DB86D48
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-10-16SubPrimeF-ECM
Factor: 55473244238441916881
2009-02-10markrNF-PM1
B1=100000, B2=3000000, E=6
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61