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
1997707Factored
FactorDigitsBitsDate
19977071824.3old
115867007926.82008-07-15 07:49:08
84862593371033.02008-07-15 07:49:09
3410676291629377195266072478.22022-05-30 15:29:15
ECM
DigitsB1Curves
2550000280 / 280
3025000059 / 640
Estimated T-Level: 25.5 ⓘ
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-05Oliver KruseAF530111E709AF7D3013
Verified (Factored)2017-11-13Chang Chia-TcheAF530111E709AF7D3106172613
Verified2022-05-30SRJ2877D3558DE89E223A774118994753
History
DateUserTypeResult
2022-08-15USAFSSNF-PM1
B1=132000, B2=134381520
2022-05-31slandrumCERT
PRP Certification
Proof certified good
2022-05-30SRJ2877C-PRP
M1997707/19977071/115867007/8486259337/341067629162937719526607 : D3558DE89E223A77
PRP proof power = 7
PRP: Verified
Proof certified good
2022-05-30debrouxlF-ECM
Factor: 341067629162937719526607 / (ECM curve 1, B1=50000, B2=6600000, Sigma=8590362090297405)
2017-11-13Chang Chia-TcheC-PRP
M1997707/19977071/115867007/8486259337 : AF530111E709AF7D
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1997707/19977071/115867007/8486259337 : AF530111E709AF7D
PRP: Verified (Factored)
PRP without proof (not generated)
2008-07-15J FeitsmaF
Factor: 8486259337
2008-07-15J FeitsmaF
Factor: 115867007