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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MnStatusDetails
3450197Factored
FactorDigitsBitsDate
39567087933296485371961.82009-07-01 23:09:49
ECM
DigitsB1Curves
25500004 / 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)Charlie Dorian6579AF5A982154620
Verified (Factored)1999-07-12Jessica Freiberg6579AF5A98215462402617
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-06kkmrkkblmbrbk339AD7994193E6BA19746453
Verified2017-11-22Oliver Kruse339AD7994193E6BA1323946553
History
DateUserTypeResult
2022-05-12LordJuliusNF
no factor from 2^64 to 2^65
2022-05-12LordJuliusNF
no factor from 2^63 to 2^64
2022-05-12LordJuliusNF
no factor from 2^62 to 2^63
2022-01-22JossNF-PM1
B1=1000000, B2=114656850
2021-06-11JossNF
no factor from 2^67 to 2^68
2021-03-17JossNF
no factor from 2^66 to 2^67
2021-03-17JossNF-PM1
B1=345019, B2=3450197, E=6
2021-02-27JossNF
no factor from 2^65 to 2^66
2017-11-22Oliver KruseC-PRP
M3450197/3956708793329648537 : 339AD7994193E6BA
PRP: Verified
PRP without proof (not generated)
2017-11-06kkmrkkblmbrbkC-PRP
M3450197/3956708793329648537 : 339AD7994193E6BA
PRP: Verified
PRP without proof (not generated)
2009-07-01alan145F-ECM
Factor: 3956708793329648537
2009-03-22S485122NF
no factor from 2^60 to 2^61