2-

2^1231-1

Open composite · C329

Target FactorDB

NFS Planning

GNFS Murphy estimate
1.85e-22
SNFS Murphy raw
2.05e-17
SNFS Murphy normalized (deg 6)
1.28e-17
Preferred method
SNFS
SNFS possible
Yes
SNFS degree
7
SNFS skew
1.39615

Identifiers

Target expression
2^1231-1
Target link
FactorDB page
Target ID
1000000000000001231
Target changed
Before 6/8/2026
Parent query
Same as target
Parent ID
-
Cofactor token
C329
Imported
Jun 07, 2026, 01:40 AM UTC

Raw pmain126 Factorization

531793.5684759.18207494497.63919078363121681207. C329

SNFS Polynomial

Degree
7
Raw Murphy
2.05e-17
Normalized (deg 6)
1.28e-17
Skew
1.39615
Selected
Best
n: 10509675246187045117563852750146264197611479975804142721731531595602756510221270765813277368426501278656128973556269109657026137018041565905222714362960997533097607258789954985564424198129792052006639066584026626057381466017914871012432662702026573043466010431527944674309550363725393769281711584260829631142009053376143430887839
# 2^1231-1, difficulty: 370.87, skewness: 1.10
# cost: 2.89086e+22, est. time: 13765999.90 GHz days (not accurate yet!)
# Optimized skew: 1.39615 Murphy: 2.05e-17
skew: 1.39615
c7: 1
c0: -2
Y1: -1
Y0: 95780971304118053647396689196894323976171195136475136
type: snfs