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

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MnStatusDetails
386731Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1174674892348686863978990994434199232968141133.12023-07-31 04:39:36
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000201 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski62950
Verified (Factored)Marc HoneyE446162483DB62950
Verified (Factored)Eivind TrielE446162483DB6295224032
Verified (Factored)2002-11-09S57483E446162483DB6295334660
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-08-06JacobZ60B1C9BA9497B620121931153
P-1 factors
DateFactorB1B2
2023-07-3111746748923486868639789909944341992329681730000002103141080040
History
DateUserTypeResult
2024-09-17yuriy5-1NF-PM1
B1=12000002, B2=1719840021900
2023-08-06ejstraussreisCERT
PRP Certification
Proof certified good
2023-08-06JacobZC-PRP
M386731/11746748923486868639789909944341992329681 : 60B1C9BA9497B620
PRP proof power = 5
PRP: Verified
Proof certified good
2023-07-31JacobZF-PM1
Factor: 11746748923486868639789909944341992329681 / (P-1, B1=73000000, B2=2103141080040)
2023-07-20JossNF-PM1
B1=1000000, B2=68245727550
2023-02-06JossNF-PM1
B1=1000000, B2=28509731250
2023-01-04masserNF-PP1
Start=6/5, B1=20000000, B2=640000000
2022-12-27masserNF-PP1
Start=2/7, B1=20000000, B2=640000000
2022-12-26masserNF-PP1
Start=170/59, B1=20000000, B2=620000000
2022-12-04Gordon SpenceNF
no factor from 2^67 to 2^68
2022-03-13YxinityNF
no factor from 2^66 to 2^67
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-05-21Gordon SpenceNF
no factor from 2^65 to 2^66
2018-02-01BloodERazorNF
no factor from 2^64 to 2^65
2017-01-13mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2015-11-25Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-25Gordon SpenceNF
no factor from 2^62 to 2^63
2012-12-01dbaughNF
no factor from 2^61 to 2^62
2012-11-27dbaughNF
no factor from 2^60 to 2^61
2012-07-25alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2009-01-09Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-06Sturle SundeNF
no factor from 2^58 to 2^59