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
2238091Factored
FactorDigitsBitsDate
61417266743769335585112272.42009-12-24 01:42:19
ECM
DigitsB1Curves
255000097 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Lars SözüerB47DDC9FE4481CB80
Verified (Factored)1999-02-14Adrian D. WilleyB47DDC9FE4481CB82165867
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-12kkmrkkblmbrbkD8B5B88DBB3A8BFF13216153
Verified2017-10-28Oliver KruseD8B5B88DBB3A8BFF1214410853
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-10-28Oliver KruseC-PRP
M2238091/6141726674376933558511 : D8B5B88DBB3A8BFF
PRP: Verified
PRP without proof (not generated)
2017-10-12kkmrkkblmbrbkC-PRP
M2238091/6141726674376933558511 : D8B5B88DBB3A8BFF
PRP: Verified
PRP without proof (not generated)
2016-04-21alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-12-24Chang Chia-TcheF-ECM
Factor: 6141726674376933558511
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61