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
6987823Factored
FactorDigitsBitsDate
258021374454020353051912374.42023-12-01 13:52:04
ECM
DigitsB1Curves
25500006 / 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)1999-09-22Duraid Madina787675DD6E42B63D5056758
Verified (Factored)2001-11-14Richard Prairie787675DD6E42B63D557074
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-12-02Naegi Makoto5BB15BD17AD20EBF1220245453
P-1 factors
DateFactorB1B2
2023-12-012580213744540203530519142000004044086310
History
DateUserTypeResult
2023-12-02curtiscCERT
PRP Certification
Proof certified good
2023-12-02Naegi MakotoC-PRP
M6987823/25802137445402035305191 : 5BB15BD17AD20EBF
PRP proof power = 8
PRP: Verified
Proof certified good
2023-12-01Sid & AndyF-PM1
Factor: 25802137445402035305191 / (P-1, B1=4200000, B2=4044086310)
2021-12-06Seth_TrNF-PM1
B1=2000000, B2=258849360
2021-09-25SRBaseNF
no factor from 2^71 to 2^72
2021-09-07SRBaseNF
no factor from 2^70 to 2^71
2021-08-13takahashiNF
no factor from 2^69 to 2^70
2020-04-10TJAOINF
no factor from 2^68 to 2^69
2020-02-02takahashiNF-PM1
B1=600000, B2=12000000, E=12
2018-02-27-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-27Gordon SpenceNF
no factor from 2^66 to 2^67
2015-07-03VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-14lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-12-10James HeinrichNF-PM1
B1=135000, B2=2835000, E=6