7^499-1

Open composite · C390

NFS Planning

GNFS Murphy estimate: 5.35e-26
SNFS Murphy score: 3.80e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.36579

Identifiers

Target expression: 7^499-1
Target link: FactorDB page
Target ID: 1000000000018629007
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C390
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 1997.85829.2841035543.106026323287223. C390

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 3.80e-19
Skew: 1.36579
Selected: Best

n: 163255653904702308743046167822624592993565768865361681563884440039442610634435784242886133139139502398228697786879334223669033855061581885169693940841827278494019512076668571936536756026834550302035937839912250286010618436362150695661923360330368584084850339923012224844656065217494648152413871973437677060412067914161919240931453560097701220568474769671043789091101816706361630173538326601
# 7^499-1, difficulty: 421.70, skewness: 1.74
# cost: 5.49733e+23, est. time: 261777818.81 GHz days (not accurate yet!)
# Optimized skew: 1.36579 Murphy: 3.80e-19
skew: 1.36579
c7: 1
c0: -49
Y1: -1004525211269079039999221534496697502180541686174722466474743
Y0: 1
type: snfs