7^431-1

Open composite · C315

NFS Planning

GNFS Murphy estimate: 1.20e-21
SNFS Murphy score: 2.31e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 2.90541

Identifiers

Target expression: 7^431-1
Target link: FactorDB page
Target ID: 1000000000018628599
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C315
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 3602407438103418087310110702859943140744217508967. C315

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.31e-17
Skew: 2.90541
Selected: Best

n: 798934480869523446600289153268679445681219820219628664365782498934673999696249267161152857997327978562777632460600566178561276226646236664840775263814812318232376810781252695525110107593781916376533104753347642432334243503678380938633097953533619056085327884050647854422944595977508465998577964450258305727368611471
# 7^431-1, difficulty: 366.77, skewness: 2.30
# cost: 2.25667e+22, est. time: 10746050.81 GHz days (not accurate yet!)
# Optimized skew: 2.90541 Murphy: 2.31e-17
skew: 2.90541
c7: 1
c0: -343
Y1: -1
Y0: 24893071176241544900787221684958608586849291716964049
type: snfs