Marin Mersenne 2^P-1
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MnStatusDetails
2132957Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
527689365153693256732065.52015-12-27 16:49:12
ECM
DigitsB1Curves
2550000280 / 280
30250000163 / 640
Estimated T-Level: 26.3 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1997-11-11Herb SavageB87C61B6BE04C4C90
Verified (Factored)1999-01-29Bjørn Roger LarsenB87C61B6BE04C4C9577690
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron3C5F4DE68CD054A21013
Verified2017-10-21Oliver Kruse3C5F4DE68CD054A21126003813
History
DateUserTypeResult
2017-10-21Oliver KruseC-PRP
M2132957/52768936515369325673 : 3C5F4DE68CD054A2
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2132957/52768936515369325673 : 3C5F4DE68CD054A2
PRP: Verified
PRP without proof (not generated)
2016-03-21alpertronNF-PM1
B1=500000, B2=15000000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-27ramgeisF
Factor: 52768936515369325673 / TF: 65-66*
2015-03-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-07ramgeisNF
no factor from 2^62 to 2^63
2012-04-15Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-23James HeinrichNF-PM1
B1=140000, B2=3045000, E=6
2011-01-12JossNF-PM1
B1=50000
2009-01-04Sturle SundeNF
no factor from 2^60 to 2^61