Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4649681Factored
FactorDigitsBitsDate
12366875335576222238851375307449733106.62023-02-27 16:29:47
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)1998-05-08Stephan Grupp0E7E7F5C59AF0C030
Verified (Factored)2001-03-25Robin Tremblay0E7E7F5C59AF0C033027990
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-03-02Naegi Makoto573FED898B519EE11234743853
P-1 factors
DateFactorB1B2
2023-02-27123668753355762222388513753074497430000011204171550
History
DateUserTypeResult
2023-03-02crutanCERT
PRP Certification
Proof certified good
2023-03-02Naegi MakotoC-PRP
M4649681/123668753355762222388513753074497 : 573FED898B519EE1
PRP proof power = 7
PRP: Verified
Proof certified good
2023-02-27Sid & AndyF-PM1
Factor: 123668753355762222388513753074497 / (P-1, B1=4300000, B2=11204171550)
2021-03-24-Anonymous-NF
no factor from 2^71 to 2^72
2021-03-21-Anonymous-NF
no factor from 2^70 to 2^71
2021-03-21-Anonymous-NF
no factor from 2^69 to 2^70
2021-03-21-Anonymous-NF
no factor from 2^68 to 2^69
2018-10-16chuenkitNF
no factor from 2^67 to 2^68
2018-07-06BloodERazorNF
no factor from 2^66 to 2^67
2018-07-02Ismo LaitelaNF-PM1
B1=1988203, B2=61634303, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-07snme2pm1NF
no factor from 2^65 to 2^66
2015-02-04monstNF
no factor from 2^64 to 2^65
2015-02-03JayderNF
no factor from 2^63 to 2^64
2012-02-07Squeeky_SquirrelNF-PM1
B1=110000, B2=2090000, E=6
2011-12-09GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-12USAFSSNF-PM1
B1=55000, B2=866250, E=6
2010-07-21markrNF
no factor from 2^61 to 2^62