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

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MnStatusDetails
3714259Factored
FactorDigitsBitsDate
782600074297269062429832376.12021-10-02 03:40:15
ECM
DigitsB1Curves
255000080 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1997-12-13John ZabelFA742636264C6C920
Verified (Factored)2001-01-21Paul Victor NovareseFA742636264C6C922296808
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-10-07riccardo uberti6BDBBB0BC3560E5516566653
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-04JossNF-PM1
B1=90000
2021-10-08riccardo ubertiNF-PP1
Start=6/5, B1=2500000, B2=50000000
2021-10-07riccardo ubertiNF-PP1
Start=2/7, B1=2500000, B2=50000000
2021-10-07Ben DeloCERT
PRP Certification
Proof certified good
2021-10-07riccardo ubertiC-PRP
M3714259/78260007429726906242983 : 6BDBBB0BC3560E55
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-02daveward2005F-ECM
Factor: 78260007429726906242983 / (ECM curve 4, B1=50000, B2=5000000, Sigma=2930850727606944)
2021-05-16axnNF-PM1
B1=14000000, B2=700000000
2021-03-07axnNF
no factor from 2^69 to 2^70
2020-12-14axnNF
no factor from 2^68 to 2^69
2019-01-28TJAOINF
no factor from 2^67 to 2^68
2016-10-31Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-01-22VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-22VictordeHollanderNF
no factor from 2^63 to 2^64
2012-12-10Squeeky_SquirrelNF-PM1
B1=245000, B2=7717500, E=12
2012-04-19GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-19Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-06Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-07S485122NF
no factor from 2^60 to 2^61