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
1678199Factored
FactorDigitsBitsDate
42152432100590657111961.92009-09-18 08:58:55
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Bruce LovingBE0D2C8EC9025EF00
Verified (Factored)1998-11-21Mitch DayBE0D2C8EC9025EF0803663
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron485A46E9912CDE531013
Verified2017-10-18Oliver Kruse485A46E9912CDE53110347213
History
DateUserTypeResult
2017-10-18Oliver KruseC-PRP
M1678199/4215243210059065711 : 485A46E9912CDE53
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1678199/4215243210059065711 : 485A46E9912CDE53
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-09-18SubPrimeF-ECM
Factor: 4215243210059065711