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
490421Factored
FactorDigitsBitsDate
703448409810645089932065.92009-07-27 08:52:02
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)Robert Clark754CB0AC6480EC5C0
Verified (Factored)Cornelius Caesar754CB0AC6480EC5C0
Verified (Factored)Eivind Triel754CB0AC6480EC5C132085
Verified (Factored)Brian J. Beesley754CB0AC6480EC5C244868
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-27Oliver Kruse433B41FA431B64771013
Verified2017-09-27Oliver Kruse433B41FA431B64771013
Verified2017-11-07kkmrkkblmbrbk433B41FA431B6477133470313
Unverified (Reliable)2020-04-18Oliver Kruse3614921EE168BC__144703453
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M490421/70344840981064508993 : 3614921EE168BC__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-07kkmrkkblmbrbkC-PRP
M490421/70344840981064508993 : 433B41FA431B6477
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M490421/70344840981064508993 : 433B41FA431B6477
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M490421/70344840981064508993 : 433B41FA431B6477
PRP: Unverified (Reliable)
PRP without proof (not generated)
2009-07-27JimBaF-ECM
Factor: 70344840981064508993