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

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Exponent Range:










MnStatusDetails
12917939Factored
FactorDigitsBitsDate
98565787115028666112732273.12021-12-23 17:28:45
2951860831718353286096412419756768326439341134.42021-12-23 17:28:45
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-07-27Rick Pali28BB1D6A3BDC3AA66146211
Verified (Factored)2005-01-20Ars Technica Team Prime Rib28BB1D6A3BDC3AA68195873
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-05-24XZT24DB50495403F4E52852893153
P-1 factors
DateFactorB1B2
2021-12-2329095248633234266801110498580589685264426418936964570241330228915000001557350340
History
DateUserTypeResult
2022-05-24Simon JosefssonCERT
PRP Certification
Proof certified good
2022-05-24XZTC-PRP
M12917939/29518608317183532860964124197567683264393/9856578711502866611273 : 24DB50495403F4E5
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-23LuminescenceF-PM1
Factor: 290952486332342668011104985805896852644264189369645702413302289 / (P-1, B1=1500000, B2=1557350340)
2021-10-30-Anonymous-NF
no factor from 2^71 to 2^72
2021-08-30SRBaseNF
no factor from 2^70 to 2^71
2021-08-07SRBaseNF
no factor from 2^69 to 2^70
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2015-04-14ThaNF
no factor from 2^66 to 2^67
2014-05-12NesowaNF
no factor from 2^65 to 2^66
2013-06-01lycornNF
no factor from 2^64 to 2^65