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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
6996083Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
49123283558248199200029532582.02020-08-28 05:06:36
ECM
DigitsB1Curves
255000019 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-08-10Piotr MarzecB472C3882389A7192411648
Verified (Factored)2003-02-24Constantine GoulimisB472C3882389A7190
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-08-28jvangD02A9D7D70123BD0189273653
History
DateUserTypeResult
2025-01-13Stef42NF-PM1
B1=2296000, B2=7744686180
2020-08-28Ben DeloCERT
PRP Certification
Proof certified good
2020-08-28jvangC-PRP
M6996083/4912328355824819920002953 : D02A9D7D70123BD0
PRP proof power = 8
PRP: Verified
Proof certified good
2020-08-28Smok_bmv F-ECM
Factor: 4912328355824819920002953 / (ECM curve 8, B1=50000, B2=50000000)
2020-07-27takahashiNF
no factor from 2^69 to 2^70
2020-04-03TJAOINF
no factor from 2^68 to 2^69
2019-05-07takahashiNF-PM1
B1=300000, B2=5000000, E=6
2018-02-25-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-27Gordon SpenceNF
no factor from 2^66 to 2^67
2015-07-03VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-14lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2012-08-26NesowaNF-PM1
B1=85000, B2=1530000, E=6