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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Exponent Range:










MnStatusDetails
3498493Factored
FactorDigitsBitsDate
66400445572504264791962.52009-07-23 05:34:26
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Darren Smith63ECC4DEDF6F01820
Verified (Factored)1999-09-07Andy Kohler63ECC4DEDF6F01821247837
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-07Oliver KruseDECBF22AFB4C0A061330701553
Verified2017-12-16ATHDECBF22AFB4C0A061298199253
History
DateUserTypeResult
2022-05-31LordJuliusNF
no factor from 2^66 to 2^67
2022-05-31LordJuliusNF
no factor from 2^65 to 2^66
2022-05-27LordJuliusNF
no factor from 2^64 to 2^65
2022-05-27LordJuliusNF
no factor from 2^63 to 2^64
2022-05-27LordJuliusNF
no factor from 2^1 to 2^62
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
2020-12-12JossNF-PM1
B1=349849, B2=3498493, E=6
2017-12-16ATHC-PRP
M3498493/6640044557250426479 : DECBF22AFB4C0A06
PRP: Verified
PRP without proof (not generated)
2017-11-07Oliver KruseC-PRP
M3498493/6640044557250426479 : DECBF22AFB4C0A06
PRP: Verified
PRP without proof (not generated)
2009-07-23alan145F-ECM
Factor: 6640044557250426479
2009-07-09Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-19S485122NF
no factor from 2^60 to 2^61