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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4884613Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
257473924046459734576782012684.42023-03-31 06:03:44
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)1998-04-21Johannes Stahl45AECA2F7AACBE180
Verified (Factored)2000-04-12Gerhard H Wrodnigg45AECA2F7AACBE182804107
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-04-02Naegi Makoto1ED6DDAF896D232D1156248453
P-1 factors
DateFactorB1B2
2023-03-3125747392404645973457678201410000010697308050
History
DateUserTypeResult
2023-04-02A.Dent.42CERT
PRP Certification
Proof certified good
2023-04-02Naegi MakotoC-PRP
M4884613/25747392404645973457678201 : 1ED6DDAF896D232D
PRP proof power = 7
PRP: Verified
Proof certified good
2023-03-31Sid & AndyF-PM1
Factor: 25747392404645973457678201 / (P-1, B1=4100000, B2=10697308050)
2020-12-03-Anonymous-NF
no factor from 2^70 to 2^71
2018-06-24YxinityNF
no factor from 2^69 to 2^70
2018-06-24YxinityNF
no factor from 2^68 to 2^69
2018-05-08ramgeisNF
no factor from 2^67 to 2^68
2017-11-05YxinityNF
no factor from 2^66 to 2^67
2017-01-20Squeeky_SquirrelNF-PM1
B1=300000, B2=9150000, E=12
2016-02-23Mark RoseNF
no factor from 2^1 to 2^63
2015-07-22snme2pm1NF
no factor from 2^65 to 2^66
2015-01-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-07VictordeHollanderNF
no factor from 2^63 to 2^64
2011-10-28Squeeky_SquirrelNF-PM1
B1=85000, B2=1466250, E=6
2011-10-09GrunwalderGIMPNF
no factor from 2^1 to 2^63
2009-08-27Carsten KossendeyNF-PM1
B1=25000, B2=356250