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

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MnDetails
7665751
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
3590244781965654431270826972788.22020-05-25 01:07:33
P-1 factors
DateFactorsB1B2
2020-05-25359024478196565443127082697
13376981337698
ECM
DigitsB1Curves
255000053 / 280
Estimated T-Level: 20.9 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
Factored1999-10-29Kevin England70EEA3AC65126A411064562Windows,Prime95,v19,(aka WV1)
Factored2002-10-12arnaud70EEA3AC65126A411898347Windows,Prime95,v21,(aka WX1)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2020-05-26riccardo uberti8782C1E5DAAA5A791702417953
Verified
PRP without proof (not generated)
2020-05-26marssystems8782C1E5DAAA5A791407958653
History
DateUserTypeResult
2025-10-18Sid & AndyNF-PM1B1=2400000, B2=3647339850
2021-07-26riccardo ubertiNF-PP1Start=6/5, B1=1500000, B2=30000000
2021-07-18riccardo ubertiNF-PP1Start=2/7, B1=1500000, B2=30000000
2020-05-26marssystemsC-PRPM7665751/359024478196565443127082697 : 8782C1E5DAAA5A79
2020-05-26riccardo ubertiC-PRPM7665751/359024478196565443127082697 : 8782C1E5DAAA5A79
2020-05-25GdSF-PM1Factor: 359024478196565443127082697 / B1=1337698
2020-03-20TJAOINFno factor TF: 68-69
2018-07-31ramgeisNFno factor TF: 67-68
2016-09-19Gordon SpenceNFno factor TF: 66-67
2015-06-12VictordeHollanderNFno factor TF: 65-66
2013-12-07David CampeauNFno factor TF: 64-65
2013-10-11NesowaNFno factor TF: 63-64
2012-08-01NesowaNF-PM1B1=95000, B2=1757500, E=6
2002-10-12arnaudC-LL70EEA3AC65126A41
2002-05-25arnaudNF-PM1B1=35000, B2=332500
1999-10-29-anonymous-C-LL70EEA3AC65126A41
1998-08-30MadPoo 🙂NFno factor TF: 1-63
1998-08-02-anonymous-NFno factor TF: 1-61