5^503-1

Open composite · C260

NFS Planning

GNFS Murphy estimate: 1.86e-18
SNFS Murphy score: 8.40e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.58499

Identifiers

Target expression: 5^503-1
Target link: FactorDB page
Target ID: 1000000000018437031
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C260
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(1) 30181.390543339331.3447076237287135944677009.1275493575009421434709030165445757723012169857054889.C260

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 8.40e-17
Skew: 1.58499
Selected: Best

n: 18421295324803870079882191466475809337805655285605809408851473878061569093429181914460657723912036093099263517974357055390054254567378739735525996424310026582528633731050718434575227402623506720493539321133139886946600941448598032478228915027949697577374111421
# 5^503-1, difficulty: 352.28, skewness: 1.26
# cost: 9.26938e+21, est. time: 4413992.33 GHz days (not accurate yet!)
# Optimized skew: 1.58499 Murphy: 8.40e-17
skew: 1.58499
c7: 1
c0: -5
Y1: -1
Y0: 211758236813575084767080625169910490512847900390625
type: snfs