7^439-1

Open composite · C341

NFS Planning

GNFS Murphy estimate: 3.72e-23
SNFS Murphy score: 1.67e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 2.20444

Identifiers

Target expression: 7^439-1
Target link: FactorDB page
Target ID: 1000000000018628647
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C341
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 572749682520506652634407616247. C341

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.67e-17
Skew: 2.20444
Selected: Best

n: 28968329968958785088925881443681298831662770371644757563104389307689638689421954012506065982643769333907437054882330610986687323864745437187639812360764362057689967720523055820357492897013829505353815518596279261464389725179078322476602824251274937213256559295076554547379192502141014048855111400094240996047205069404290718281635501515689631
# 7^439-1, difficulty: 372.69, skewness: 1.74
# cost: 3.22527e+22, est. time: 15358442.70 GHz days (not accurate yet!)
# Optimized skew: 2.20444 Murphy: 1.67e-17
skew: 2.20444
c7: 1
c0: -49
Y1: -1
Y0: 174251498233690814305510551794710260107945042018748343
type: snfs