Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
3911521Factored
FactorDigitsBitsDate
33232543110087569449362712581.52022-07-17 02:35:06
490728616343554318793898900305900400737121.92021-06-13 08:56:04
ECM
DigitsB1Curves
255000018 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-02-01Team Waterloo6579408905B484A90
Verified (Factored)1999-09-07MSR Cambridge6579408905B484A9609039
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2021-06-16Sébastien BROUCKE09D696C7D39EFCEA1180184353
Verified (Factored)2021-06-27marssystems09D696C7D39EFCEA1137064653
Verified2022-07-18Wentao Huang09D696C7D39EFCEA293021553
P-1 factors
DateFactorB1B2
2021-06-13490728616343554318793898900305900400714000000700000000
2022-07-17332325431100875694493627139115213954477450
History
DateUserTypeResult
2022-07-18qtdszwsCERT
PRP Certification
Proof certified good
2022-07-18Wentao HuangC-PRP
M3911521/3323254311008756944936271/4907286163435543187938989003059004007 : 09D696C7D39EFCEA
PRP proof power = 7
PRP: Verified
Proof certified good
2022-07-17JossF-PM1
Factor: 3323254311008756944936271 / (P-1, B1=3911521, B2=3954477450)
2022-02-12JossNF-PM1
B1=1000000, B2=134904000
2021-06-27DerekCERT
PRP Certification
Proof certified good
2021-06-27marssystemsC-PRP
M3911521/4907286163435543187938989003059004007 : 09D696C7D39EFCEA
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2021-06-16Sébastien BROUCKEC-PRP
M3911521/4907286163435543187938989003059004007 : 09D696C7D39EFCEA
PRP: Verified (Factored)
PRP without proof (not generated)
2021-06-13axnF-PM1
Factor: 4907286163435543187938989003059004007 / (P-1, B1=14000000, B2=700000000)
2021-06-09-Anonymous-NF
no factor from 2^70 to 2^71
2021-04-17axnNF
no factor from 2^69 to 2^70
2020-11-24Carlos PinhoNF-PM1
B1=172000, B2=4761000, E=6
2020-06-12TJAOINF
no factor from 2^68 to 2^69
2019-01-18YxinityNF
no factor from 2^67 to 2^68
2016-12-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-01JossNF-PM1
B1=228096, B2=2280960, E=6
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-11ramgeisNF
no factor from 2^65 to 2^66
2015-01-14VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-14VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-03JossNF-PM1
B1=86409
2012-02-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-05Squeeky_SquirrelNF-PM1
B1=70000, B2=1172500, E=6
2011-02-14Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-09Carsten KossendeyNF-PM1
B1=20000, B2=285000
2008-12-30Architects CubedNF
no factor from 2^60 to 2^61