6^491-1

Open composite · C301

NFS Planning

GNFS Murphy estimate: 7.77e-21
SNFS Murphy score: 9.11e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.01909

Identifiers

Target expression: 6^491-1
Target link: FactorDB page
Target ID: 1100000000013095157
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C301
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 983.447793.5514913.292396393.2780594730445703.11677264980525481.20081279129737577144847073.C301

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 9.11e-18
Skew: 1.01909
Selected: Best

n: 5103665891041116350609174673007052440395161142739518454526624016693517934331076252917291733701291649152336278209460667437149408401358185406815557122497106007462697697462258059099119834692912320865604672919919821085080921163167058352713917322739743885930540966976182052182330862568345422900760798520339
# 6^491-1, difficulty: 382.07, skewness: 1.29
# cost: 5.64401e+22, est. time: 26876261.75 GHz days (not accurate yet!)
# Optimized skew: 1.01909 Murphy: 9.11e-18
skew: 1.01909
c7: 1
c0: -6
Y1: -2955204414547681244658707659790455381671329323051646976
Y0: 1
type: snfs