Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4363979Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
138212795726103896744092373.52022-12-16 04:16:06
ECM
DigitsB1Curves
255000012 / 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)David A McGough8F66555507E3412D0
Verified (Factored)1999-11-24Jonathan Champ8F66555507E3412D3631901
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-12-22Funky Waddle512946564D4653201409625153
P-1 factors
DateFactorB1B2
2022-12-1613821279572610389674409620000026689642980
History
DateUserTypeResult
2022-12-22bakudanchanCERT
PRP Certification
Proof certified good
2022-12-22Funky WaddleC-PRP
M4363979/13821279572610389674409 : 512946564D465320
PRP proof power = 7
PRP: Verified
Proof certified good
2022-12-16DRobinsonPEF-PM1
Factor: 13821279572610389674409 / (P-1, B1=6200000, B2=26689642980)
2021-01-29-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-29-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-25-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-25-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-30Ismo LaitelaNF-PM1
B1=2237739, B2=62656681, E=12
2018-10-29chuenkitNF
no factor from 2^67 to 2^68
2018-05-02chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-18snme2pm1NF
no factor from 2^65 to 2^66
2014-07-07lycornNF
no factor from 2^64 to 2^65
2014-07-05JayderNF
no factor from 2^63 to 2^64
2012-01-15GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-12-31Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-21markrNF
no factor from 2^61 to 2^62
2009-08-03Carsten KossendeyNF-PM1
B1=25000, B2=356250