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

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MnStatusDetails
8294821Factored
FactorDigitsBitsDate
42200019125779260716846872581.82022-11-08 01:15:33
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-11-17Sid McHarg79DC5D0649DF50307515957
Verified (Factored)2002-09-07Ars Technica Team Prime Rib79DC5D0649DF50303278672
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-11-13Funky Waddle2F26AC69B95E78F41247286053
P-1 factors
DateFactorB1B2
2022-11-08422000191257792607168468730000004451879250
History
DateUserTypeResult
2022-11-14Ben DeloCERT
PRP Certification
Proof certified good
2022-11-13Funky WaddleC-PRP
M8294821/4220001912577926071684687 : 2F26AC69B95E78F4
PRP proof power = 8
PRP: Verified
Proof certified good
2022-11-08linamentF-PM1
Factor: 4220001912577926071684687 / (P-1, B1=3000000, B2=4451879250)
2022-11-07linamentNF-PM1
B1=2999900
2021-10-05SRBaseNF
no factor from 2^71 to 2^72
2021-08-31SRBaseNF
no factor from 2^70 to 2^71
2021-08-20SRBaseNF
no factor from 2^69 to 2^70
2020-02-05Aaron HavilandNF-PM1
B1=300000, B2=6075000, e=12
2020-01-10TJAOINF
no factor from 2^68 to 2^69
2018-01-03monstNF
no factor from 2^67 to 2^68
2015-12-20snme2pm1NF
no factor from 2^66 to 2^67
2015-06-03VictordeHollanderNF
no factor from 2^65 to 2^66
2014-01-06David CampeauNF
no factor from 2^64 to 2^65
2012-12-01NesowaNF-PM1
B1=95000, B2=1662500, E=6