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
391397Factored
FactorDigitsBitsDate
41892075726259686856036632581.82009-08-30 19:28:05
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski2FF60
Verified (Factored)Hal Murray1F3E9AB06007AFF60
Verified (Factored)Matt Horbal1F3E9AB06007AFF60
Verified (Factored)Eivind Triel1F3E9AB06007AFF615067
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-23Oliver Kruse88008CFEBE1ACD8A1013
Verified2017-09-24Oliver Kruse88008CFEBE1ACD8A1013
Verified2017-11-06kkmrkkblmbrbk88008CFEBE1ACD8A126427513
Unverified (Reliable)2020-04-18Oliver KruseF4C9DBDAC4A425__133260753
History
DateUserTypeResult
2024-02-19Denial140NF-PM1
B1=1000000, B2=6154694700
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M391397/4189207572625968685603663 : F4C9DBDAC4A425__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M391397/4189207572625968685603663 : 88008CFEBE1ACD8A
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M391397/4189207572625968685603663 : 88008CFEBE1ACD8A
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M391397/4189207572625968685603663 : 88008CFEBE1ACD8A
PRP: Unverified (Reliable)
PRP without proof (not generated)
2009-08-30JimBaF-ECM
Factor: 4189207572625968685603663
2009-01-16Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-06Sturle SundeNF
no factor from 2^58 to 2^59