Marin Mersenne 2^P-1
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MnStatusDetails
2097679Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2096018069297147226972167.52016-05-25 02:51:59
ECM
DigitsB1Curves
2550000280 / 280
30250000165 / 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)Brian Peterson6B2F571E1F96E90B0
Verified (Factored)1999-06-26David Allen6B2F571E1F96E90B1209363
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk7E0AA0E61762D5141013
Verified2017-10-21Oliver Kruse7E0AA0E61762D5141108832313
History
DateUserTypeResult
2023-01-27USAFSSNF-PM1
B1=288000, B2=304700760
2017-10-21Oliver KruseC-PRP
M2097679/209601806929714722697 : 7E0AA0E61762D514
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M2097679/209601806929714722697 : 7E0AA0E61762D514
PRP: Verified
PRP without proof (not generated)
2016-05-25lettpF-ECM
Factor: 209601806929714722697 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-31ramgeisNF
no factor from 2^65 to 2^66
2015-04-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-13VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-04ramgeisNF
no factor from 2^62 to 2^63
2012-03-24Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-23James HeinrichNF-PM1
B1=140000, B2=3150000, E=6
2011-01-09JossNF-PM1
B1=50000
2010-12-28JossNF-PM1
B1=30000
2009-07-31USAFSSNF-PM1
B1=20000, B2=260000
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61