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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
5622941Factored
FactorDigitsBitsDate
1546262967395410414661932477.02021-07-22 03:18:10
ECM
DigitsB1Curves
255000011 / 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)1998-12-13Marco Mantovanelli9440FA6E9DBBA04D0
Verified (Factored)2000-09-15Stephen Wood9440FA6E9DBBA04D695812
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-07-22ATHE4AA3219FC1F589F1267762353
History
DateUserTypeResult
2021-07-22Ben DeloCERT
PRP Certification
Proof certified good
2021-07-22ATHC-PRP
M5622941/154626296739541041466193 : E4AA3219FC1F589F
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-22ATHF-PP1
Start=2/7, B1=1000000, Factor: 154626296739541041466193
2020-12-16-Anonymous-NF
no factor from 2^70 to 2^71
2020-12-14-Anonymous-NF
no factor from 2^69 to 2^70
2020-07-31TJAOINF
no factor from 2^68 to 2^69
2019-10-22USAFSSNF-PM1
B1=340000, B2=10115000, E=12
2018-07-05ramgeisNF
no factor from 2^67 to 2^68
2016-06-18Gordon SpenceNF
no factor from 2^66 to 2^67
2015-10-15ramgeisNF
no factor from 2^65 to 2^66
2014-11-13monstNF
no factor from 2^64 to 2^65
2014-11-13NesowaNF
no factor from 2^63 to 2^64
2011-01-16USAFSSNF-PM1
B1=65000, B2=1023750, E=6
2009-04-15GrunwalderGIMPNF
no factor from 2^62 to 2^63