Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
3743897Factored
FactorDigitsBitsDate
124021541803986167108805754408555249111940129.92022-01-27 09:19:34
ECM
DigitsB1Curves
255000027 / 280
Estimated T-Level: 20.5
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-02-24Rudi Venter95A164E5075CB1240
Verified (Factored)1999-11-04Aaron B95A164E5075CB1241950675
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-02-03_p95holder_63730079B4AE47EE1245108053
Verified2022-02-03Oliver Kruse63730079B4AE47EE126317553
History
DateUserTypeResult
2022-02-03REDCERT
PRP Certification
Proof certified good
2022-02-03Oliver KruseC-PRP
M3743897/1240215418039861671088057544085552491119 : 63730079B4AE47EE
PRP proof power = 7
PRP: Verified
Proof certified good
2022-02-03_p95holder_C-PRP
M3743897/1240215418039861671088057544085552491119 : 63730079B4AE47EE
PRP: Verified
PRP without proof (not generated)
2022-01-27daveward2005F-ECM
Factor: 1240215418039861671088057544085552491119 / (ECM curve 1, B1=50000, B2=5000000, Sigma=8222742955023269)
2021-03-20axnNF
no factor from 2^69 to 2^70
2020-12-09axnNF
no factor from 2^68 to 2^69
2018-07-23TJAOINF
no factor from 2^67 to 2^68
2016-11-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-26ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-11-08mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-03-05Squeeky_SquirrelNF-PM1
B1=110000, B2=2035000, E=6
2012-05-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-08markrNF
no factor to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-05S485122NF
no factor from 2^60 to 2^61