Marin Mersenne 2^P-1
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MnStatusDetails
2123423Factored
FactorDigitsBitsDate
278510259419398904883604732684.52021-12-10 01:00:30
ECM
DigitsB1Curves
2550000189 / 280
Estimated T-Level: 23.4
TF below 2^73 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Jim Fare00983AB2D93E42390
Verified (Factored)1999-01-29Sami00983AB2D93E4239191392
Verified (Factored)2018-04-04kkmrkkblmbrbk00983AB2D93E42391294841
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-12-10SRJ2877C1F2DAE0CC0A8B151127939053
History
DateUserTypeResult
2021-12-10curtiscCERT
PRP Certification
Proof certified good
2021-12-10SRJ2877C-PRP
M2123423/27851025941939890488360473 : C1F2DAE0CC0A8B15
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-10daveward2005F-ECM
Factor: 27851025941939890488360473 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7351756276884211)
2021-08-19TJAOINF
no factor from 2^68 to 2^69
2019-05-06TJAOINF
no factor from 2^67 to 2^68
2018-04-04kkmrkkblmbrbkC-LL
00983AB2D93E4239
2017-08-30mikrNF-PM1
B1=2500000, B2=125000000, E=12
2017-08-30JossNF-PM1
B1=504000, B2=5040000, E=6
2017-08-19JossNF-PM1
B1=420000, B2=4200000, E=6
2016-10-15Gordon SpenceNF
no factor from 2^66 to 2^67
2016-06-25JossNF-PM1
B1=210000, B2=6090000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-26omylistNF
no factor from 2^65 to 2^66
2015-03-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-06ramgeisNF
no factor from 2^62 to 2^63
2012-04-02Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-24James HeinrichNF-PM1
B1=140000, B2=3045000, E=6
2011-01-11JossNF-PM1
B1=50000
2011-01-01JossNF-PM1
B1=30000
2009-08-03USAFSSNF-PM1
B1=20000, B2=265000
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61