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
4977877Factored
FactorDigitsBitsDate
1851902665923898769272167.32018-06-05 09:54:04
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel5D66EF61F2405C950
Verified (Factored)2000-06-23Kerry Forester5D66EF61F2405C95510044
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-06-09_p95holder_2241B0C2E5CFB12A1470717153
Verified2018-06-09ATH2241B0C2E5CFB12A1441283653
History
DateUserTypeResult
2023-07-12USAFSSNF-PM1
B1=384000, B2=227276910
2018-06-09ATHC-PRP
M4977877/185190266592389876927 : 2241B0C2E5CFB12A
PRP: Verified
PRP without proof (not generated)
2018-06-09_p95holder_C-PRP
M4977877/185190266592389876927 : 2241B0C2E5CFB12A
PRP: Verified
PRP without proof (not generated)
2018-06-05ramgeisF
Factor: 185190266592389876927 / TF: 67-68*
2017-05-22YxinityNF
no factor from 2^66 to 2^67
2016-06-14Squeeky_SquirrelNF-PM1
B1=190000, B2=5082500, E=6
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-30snme2pm1NF
no factor from 2^65 to 2^66
2014-12-29VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-29VictordeHollanderNF
no factor from 2^63 to 2^64
2011-11-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-29Squeeky_SquirrelNF-PM1
B1=60000, B2=975000, E=6
2009-12-08markrNF
no factor from 2^61 to 2^62
2009-08-27Carsten KossendeyNF-PM1
B1=30000, B2=450000