2^1231-1

Open composite · C329

NFS Planning

GNFS Murphy estimate: 1.85e-22
SNFS Murphy score: 2.05e-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: -
Parent query: Same as target
Parent ID: -
Cofactor token: C329
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

531793.5684759.18207494497.63919078363121681207. C329

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.05e-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