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

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Exponent Range:










MnStatusDetails
4992061Factored
FactorDigitsBitsDate
115474865436141759039663420651312465532140129.82022-09-15 23:48:09
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-07-05IES R.Dieste-I.Larrosa28A1D8A9780F81320
Verified (Factored)2000-04-19Steve Johnson28A1D8A9780F81324760803
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-09-22kutensB2EC5BE6A5AA39F01110414753
P-1 factors
DateFactorB1B2
2022-09-15115474865436141759039663420651312465532170000008975658510
History
DateUserTypeResult
2022-09-22MurrayInfoSysCERT
PRP Certification
Proof certified good
2022-09-22kutensC-PRP
M4992061/1154748654361417590396634206513124655321 : B2EC5BE6A5AA39F0
PRP proof power = 7
PRP: Verified
Proof certified good
2022-09-15Prism DaymonF-PM1
Factor: 1154748654361417590396634206513124655321 / (P-1, B1=7000000, B2=8975658510)
2021-04-26-Anonymous-NF
no factor from 2^71 to 2^72
2021-04-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-04-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-18TJAOINF
no factor from 2^68 to 2^69
2018-06-05ramgeisNF
no factor from 2^67 to 2^68
2017-05-21YxinityNF
no factor from 2^66 to 2^67
2017-02-05Squeeky_SquirrelNF-PM1
B1=300000, B2=9375000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-31snme2pm1NF
no factor from 2^65 to 2^66
2014-11-07lycornNF
no factor from 2^64 to 2^65
2014-11-07lycornNF
no factor from 2^63 to 2^64
2011-12-13Squeeky_SquirrelNF-PM1
B1=120000, B2=2430000, E=6
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-08Squeeky_SquirrelNF-PM1
B1=60000, B2=990000, E=6
2009-09-01Carsten KossendeyNF-PM1
B1=25000, B2=362500
2008-09-05Sturle SundeNF
no factor from 2^61 to 2^62