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
3439561Factored
FactorDigitsBitsDate
866680787635192282072066.22016-12-17 14:17:04
ECM
DigitsB1Curves
255000010 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Philipp HänggiBE75E152EFCAD2A20
Verified (Factored)1999-07-27Stephen R. HolmBE75E152EFCAD2A21715852
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-06Oliver Kruse51DE72AA944157B41191127453
Verified2017-12-16kkmrkkblmbrbk51DE72AA944157B41246694453
History
DateUserTypeResult
2022-05-11LordJuliusNF
no factor from 2^65 to 2^66
2022-05-11LordJuliusNF
no factor from 2^64 to 2^65
2022-05-11LordJuliusNF
no factor from 2^63 to 2^64
2022-05-11LordJuliusNF
no factor from 2^62 to 2^63
2022-05-11LordJuliusNF
no factor from 2^1 to 2^62
2022-01-24JossNF-PM1
B1=1000000, B2=114656850
2021-06-10JossNF
no factor from 2^67 to 2^68
2021-03-16JossNF
no factor from 2^65 to 2^66
2021-03-16JossNF-PM1
B1=343956, B2=3783517, E=6
2017-12-16kkmrkkblmbrbkC-PRP
M3439561/86668078763519228207 : 51DE72AA944157B4
PRP: Verified
PRP without proof (not generated)
2017-11-06Oliver KruseC-PRP
M3439561/86668078763519228207 : 51DE72AA944157B4
PRP: Verified
PRP without proof (not generated)
2016-12-17Sid & AndyF-ECM
Factor: 86668078763519228207 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-04-14Gordon SpenceNF
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
2014-09-17HBendtzNF-PM1
B1=500000, B2=10000000, E=12
2014-07-18JossNF-PM1
B1=78661
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-03USAFSSNF-PM1
B1=60000, B2=945000, E=6
2011-08-01markrNF
no factor from 2^61 to 2^62
2009-08-15Carsten KossendeyNF-PM1
B1=15000, B2=210000
2009-03-22S485122NF
no factor from 2^60 to 2^61