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

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MnStatusDetails
3495409Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4878803209103578156972168.72015-05-22 09:15:28
ECM
DigitsB1Curves
25500007 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dax Prather4651D01DADF6C0890
Verified (Factored)1999-09-07knut ploder4651D01DADF6C0892936251
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-07Oliver KruseC467C2078E3D558E1327875353
Verified2017-12-17kkmrkkblmbrbkC467C2078E3D558E145722053
History
DateUserTypeResult
2022-01-25JossNF-PM1
B1=1000000, B2=114656850
2021-06-14JossNF
no factor from 2^67 to 2^68
2021-02-23JossNF
no factor from 2^66 to 2^67
2021-02-21JossNF
no factor from 2^65 to 2^66
2021-02-16JossNF-PM1
B1=349540, B2=3844949, E=6
2017-12-17kkmrkkblmbrbkC-PRP
M3495409/487880320910357815697 : C467C2078E3D558E
PRP: Verified
PRP without proof (not generated)
2017-11-07Oliver KruseC-PRP
M3495409/487880320910357815697 : C467C2078E3D558E
PRP: Verified
PRP without proof (not generated)
2015-05-22Sid & AndyF-ECM
Factor: 487880320910357815697
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-05HBendtzNF-PM1
B1=615000, B2=12000000, e=12
2014-08-21JossNF-PM1
B1=78362
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-18USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-14markrNF
no factor to 2^62
2009-07-08Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-18S485122NF
no factor from 2^60 to 2^61