7^491+1

Open composite · C405

NFS Planning

GNFS Murphy estimate: 7.22e-27
SNFS Murphy score: 7.28e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.03496

Identifiers

Target expression: 7^491+1
Target link: FactorDB page
Target ID: 1000000000016828959
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C405
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 3929.781673. C405

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 7.28e-19
Skew: 1.03496
Selected: Best

n: 357059440459695349839656954267260349742473345448286100797635491815073924225585933714941250863151649585304551236010605494820361183276118158677627877896735600218033882611101539109677609494032110391085243138363171687167888999349788704831325704058145077547482881593974288681907030324533767465215782234048153840546695775039251300076039547303798029445779111959625087747036091549549181599312125331582254706584179
# 7^491+1, difficulty: 414.94, skewness: 1.32
# cost: 3.76355e+23, est. time: 179216568.21 GHz days (not accurate yet!)
# Optimized skew: 1.03496 Murphy: 7.28e-19
skew: 1.03496
c7: 1
c0: 7
Y1: -143503601609868434285603076356671071740077383739246066639249
Y0: 1
type: snfs