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
6938161Factored
FactorDigitsBitsDate
48562390272730825543427992582.02023-11-23 21:24:03
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)1999-05-02Timo Aaltonen and friends387386CA0FBBC4402383664
Verified (Factored)2002-03-31Team Laurel387386CA0FBBC4402057900
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-11-24Naegi Makoto3826AA8EC90DD7841648544053
P-1 factors
DateFactorB1B2
2023-11-23485623902727308255434279942000004046614110
History
DateUserTypeResult
2023-11-24curtiscCERT
PRP Certification
Proof certified good
2023-11-24Naegi MakotoC-PRP
M6938161/4856239027273082554342799 : 3826AA8EC90DD784
PRP proof power = 8
PRP: Verified
Proof certified good
2023-11-23Sid & AndyF-PM1
Factor: 4856239027273082554342799 / (P-1, B1=4200000, B2=4046614110)
2021-12-06Seth_TrNF-PM1
B1=2000000, B2=258849360
2021-09-25SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2021-07-25takahashiNF
no factor from 2^69 to 2^70
2021-06-02Dylan DelgadoNF-PM1
B1=630000, B2=18900000, e=12
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2018-02-27-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-26VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-16lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-09-03Carsten KossendeyNF-PM1
B1=440000, B2=13310000, E=12