Marin Mersenne 2^P-1
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MnStatusDetails
3385253Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
566750299715988107772972375.62016-11-19 00:02:37
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)amp7256BFAC232272D80
Verified (Factored)2000-01-25Nesdu Cut7256BFAC232272D8595311
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-05Oliver Kruse70CA5B6B6D1131011110700653
Verified2017-12-15kkmrkkblmbrbk70CA5B6B6D1131011228252053
History
DateUserTypeResult
2022-09-05JossNF-PM1
B1=1128417, B2=213444000
2022-04-24LordJuliusNF
no factor from 2^66 to 2^67
2022-04-24LordJuliusNF
no factor from 2^65 to 2^66
2022-04-24LordJuliusNF
no factor from 2^64 to 2^65
2022-04-24LordJuliusNF
no factor from 2^63 to 2^64
2022-04-24LordJuliusNF
no factor from 2^62 to 2^63
2022-04-24LordJuliusNF
no factor from 2^1 to 2^62
2022-01-09JossNF-PM1
B1=1128417, B2=111642300
2021-05-21JossNF
no factor from 2^67 to 2^68
2021-03-13JossNF-PM1
B1=338525, B2=3723778, E=6
2017-12-15kkmrkkblmbrbkC-PRP
M3385253/56675029971598810777297 : 70CA5B6B6D113101
PRP: Verified
PRP without proof (not generated)
2017-11-05Oliver KruseC-PRP
M3385253/56675029971598810777297 : 70CA5B6B6D113101
PRP: Verified
PRP without proof (not generated)
2016-11-19Richard KintF-ECM
Factor: 56675029971598810777297 / (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
2015-09-20Squeeky_SquirrelNF-PM1
B1=155000, B2=4030000, E=6
2015-04-02Gordon SpenceNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-13JossNF-PM1
B1=97920
2014-07-04JossNF-PM1
B1=78960
2012-11-15GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-21USAFSSNF-PM1
B1=60000, B2=930000, E=6
2011-09-10Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-10Carsten KossendeyNF-PM1
B1=15000, B2=206250
2009-03-27S485122NF
no factor from 2^60 to 2^61