7^478+1

Open composite · C250

NFS Planning

GNFS Murphy estimate: 7.06e-18
SNFS Murphy score: 1.52e-18
Preferred method: GNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.37045

Identifiers

Target expression: 7^478+1
Target link: FactorDB page
Target ID: 1000000000016828881
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C250
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(2) 1913.2690344364206236785718953.1241182777288927076465489658297577.454594570273514644803511610597908217482409777.600953672264706114995291013562375505348085683797.C250

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.52e-18
Skew: 1.37045
Selected: Best

n: 1037693988890527082595313096681510340828852221515497431698708729486690097788638040459167887213260419579691547837638716272358410286874498249837843168656388731324483765594726977252541544288113609466366482183750841388213839923063324586099620154570081077
# 7^478+1, difficulty: 403.96, skewness: 1.74
# cost: 2.01704e+23, est. time: 96049658.77 GHz days (not accurate yet!)
# Optimized skew: 1.37045 Murphy: 1.52e-18
skew: 1.37045
c7: 1
c0: 49
Y1: -2928644930813641516032715844013695341634232321209103400801
Y0: 1
type: snfs