Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
269987Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
194049823060619570777429545517615334110.62019-01-29 19:48:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000527 / 4588
Estimated T-Level: 35.6 ⓘ
TF below 2^113 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski13DB0
Verified (Factored)Unknown13DB0
Verified (Factored)Brian J. BeesleyCE8A7722949C93DB0
Verified (Factored)Eivind TrielCE8A7722949C93DB178407
Verified (Factored)2001-11-10Brian J. BeesleyCE8A7722949C93DB188807
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-01-29ATH43C2352EA6EA12EF122852253
Verified2019-01-30_p95holder_43C2352EA6EA12EF116564053
Verified2019-01-30kkmrkkblmbrbk43C2352EA6EA12EF119217253
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-01-30kkmrkkblmbrbkC-PRP
M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF
PRP: Verified
PRP without proof (small exponent)
2019-01-30_p95holder_C-PRP
M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF
PRP: Verified
PRP without proof (small exponent)
2019-01-29ATHC-PRP
M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF
PRP: Verified
PRP without proof (small exponent)
2019-01-29kkmrkkblmbrbkF-ECM
Factor: 1940498230606195707774295455176153 / (ECM curve 428, B1=1000000, B2=100000000, Sigma=6144280486019790)
2018-03-22Gordon SpenceNF
no factor from 2^64 to 2^65
2016-02-23Mark RoseNF
no factor from 2^57 to 2^58
2015-12-08Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-08Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-25NRNF
no factor from 2^61 to 2^62
2013-08-17Markus TervoorenNF-PM1
B1=20000000, B2=2000000000, E=12
2013-07-06lycornNF
no factor from 2^60 to 2^61
2012-02-26JossNF-PM1
B1=2268093
2011-02-18JossNF-PM1
B1=2000000
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59