Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3177379Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
11756302311030.1old
4378974420659548731858.62015-09-17 11:29:51
ECM
DigitsB1Curves
255000072 / 280
Estimated T-Level: 21.3 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-01Oliver Kruse294E28D4C0915E102199305653
Verified2017-12-12kkmrkkblmbrbk294E28D4C0915E10270374653
History
DateUserTypeResult
2022-04-01LordJuliusNF
no factor from 2^66 to 2^67
2022-04-01LordJuliusNF
no factor from 2^64 to 2^65
2022-04-01LordJuliusNF
no factor from 2^63 to 2^64
2022-04-01LordJuliusNF
no factor from 2^62 to 2^63
2022-02-11JossNF-PM1
B1=1000000, B2=119912100
2021-09-27JossNF
no factor from 2^67 to 2^68
2021-01-17JossNF-PM1
B1=317737, B2=3177379, E=6
2021-01-08JossNF
no factor from 2^65 to 2^66
2017-12-12kkmrkkblmbrbkC-PRP
M3177379/1175630231/437897442065954873 : 294E28D4C0915E10
PRP: Verified
PRP without proof (not generated)
2017-11-01Oliver KruseC-PRP
M3177379/1175630231/437897442065954873 : 294E28D4C0915E10
PRP: Verified
PRP without proof (not generated)
2015-09-17TJAOIF
Factor: 437897442065954873 / TF: 58-59