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

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MnStatusDetails
3486097Factored
FactorDigitsBitsDate
43789724475950211291334312581.92021-04-12 23:03:37
ECM
DigitsB1Curves
255000017 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Helmut ZeiselAEC80CAF7C8558BC0
Verified (Factored)1999-07-12Brent MortonAEC80CAF7C8558BC321523
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-04-28Luigi Morelli621579DBAB0C225B1275930653
History
DateUserTypeResult
2022-04-10JossNF-PM1
B1=1000000, B2=126668850
2021-04-28curtiscCERT
PRP Certification
Proof certified good
2021-04-28Luigi MorelliC-PRP
M3486097/4378972447595021129133431 : 621579DBAB0C225B
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-12daveward2005F-ECM
Factor: 4378972447595021129133431 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7991306525844647)
2021-01-11axnNF
no factor from 2^68 to 2^69
2018-10-01TJAOINF
no factor from 2^67 to 2^68
2017-02-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-06ramgeisNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29HBendtzNF-PM1
B1=500000, B2=10000000, E=12
2014-08-21JossNF-PM1
B1=78411
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-15USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-15markrNF
no factor from 2^61 to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-19S485122NF
no factor from 2^60 to 2^61