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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Exponent Range:





MnDetails
3565297
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 272
TF target 264
Factored
FactorDigitsBitsDate
388342272343916706516972375.02025-03-09 15:20:55
ECM
DigitsB1Curves
2550000235 / 280
Estimated T-Level: 24.2
TF below 2^75 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
Factored1998-02-24Joe DeckerE5106F30BA0164630Windows,Prime95,v15,(aka WR1)
Factored1999-08-16Don JenningsE5106F30BA0164631131536Windows,Prime95,v18,(aka WU1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
Certified Good
2025-03-09fordobr89526E6A2A1F76D91169541553
History
DateUserTypeResult
2025-03-09William WallaceCERT
Proof certified good
2025-03-09fordobrC-PRPM3565297/38834227234391670651697 : 89526E6A2A1F76D9
Proof Certified Good

Proof Power: 7

2025-03-09fordobrF-ECMFactor: 38834227234391670651697 / ECM curve 19, B1=127671, B2=275660385, Edwards Sigma=632832902983208
2025-01-15JossNF-PM1B1=14347030, B2=17723736030
2022-09-13JossNF-PM1B1=1000000, B2=130364850
2022-08-26JossNF-PM1B1=1000000
2022-08-25mikrNF-PM1B1=6000000, B2=7697946102
2022-06-23JossNF-PM1B1=840000, B2=1129851450
2021-11-09Aaron HavilandNF-PM1B1=700000, B2=12600000, E=12
2021-10-29ArtyomPNF-PP1Start=6/5, B1=50000, B2=2500000
2021-10-28ArtyomPNF-PP1Start=2/7, B1=50000, B2=2500000
2021-03-20-anonymous-NFno factor TF: 71-72
2021-03-18-anonymous-NFno factor TF: 70-71
2021-03-18-anonymous-NFno factor TF: 69-70
2020-12-24axnNFno factor TF: 68-69
2018-12-31TJAOINFno factor TF: 67-68
2017-05-13JossNF-PM1B1=350000, B2=3500000, E=6
2017-01-17Gordon SpenceNFno factor TF: 66-67
2016-03-01ramgeisNFno factor TF: 65-66
2016-03-01Squeeky_SquirrelNF-PM1B1=175000, B2=4681250, E=6
2016-02-23Mark RoseNFno factor TF: 62-63
2015-01-30VictordeHollanderNFno factor TF: 64-65
2015-01-30VictordeHollanderNFno factor TF: 63-64
2012-06-20GrunwalderGIMPNFno factor TF: 1-63
2011-12-19Squeeky_SquirrelNF-PM1B1=85000, B2=1572500, E=6
2011-06-21markrNFno factor TF: 1-62
2009-07-08Carsten KossendeyNF-PM1B1=20000, B2=245000
2009-03-15S485122NFno factor TF: 60-61
1999-08-16-anonymous-C-LLE5106F30BA016463
1998-02-24-anonymous-C-LLE5106F30BA016463
1997-11-21-anonymous-NFno factor TF: 1-60