Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
5217869Factored
FactorDigitsBitsDate
73407757489234753015932272.62018-05-28 13:09:54
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-12-13Paul Mackie3D1736BF3DA3EBE60
Verified (Factored)2000-05-17Sean C. McGinty3D1736BF3DA3EBE62983491
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-06-01_p95holder_27579A24BE677BC61340977053
Verified2018-06-03Oliver Kruse27579A24BE677BC61134721753
P-1 factors
DateFactorB1B2
2018-05-2873407757489234753015933100000
History
DateUserTypeResult
2023-05-11This -Anonymous-NF-PM1
B1=400000, B2=20000000, E=12
2018-06-03Oliver KruseC-PRP
M5217869/7340775748923475301593 : 27579A24BE677BC6
PRP: Verified
PRP without proof (not generated)
2018-06-01_p95holder_C-PRP
M5217869/7340775748923475301593 : 27579A24BE677BC6
PRP: Verified
PRP without proof (not generated)
2018-05-28Squeeky_SquirrelF-PM1
Factor: 7340775748923475301593 / (P-1, B1=310000)
2016-05-30Gordon SpenceNF
no factor from 2^66 to 2^67
2015-01-25NumberwangNF
no factor from 2^65 to 2^66
2014-12-22VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-22VictordeHollanderNF
no factor from 2^63 to 2^64
2010-06-11Squeeky_SquirrelNF-PM1
B1=60000, B2=975000, E=6
2009-08-21Carsten KossendeyNF-PM1
B1=25000, B2=337500
2009-06-18GrunwalderGIMPNF
no factor from 2^62 to 2^63