7^401+1

Open composite · C260

NFS Planning

GNFS Murphy estimate: 1.86e-18
SNFS Murphy score: 2.08e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.38938

Identifiers

Target expression: 7^401+1
Target link: FactorDB page
Target ID: 1000000000016828419
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C260
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 2889995180927.60415998014473903051753687.11703959273802193745591783983690416839783.C260

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.08e-16
Skew: 1.38938
Selected: Best

n: 46864305370848172304611921892962849260527661511810667440915584143227898235039723043331365350191291444359266726637241634841664674965316918898329531479541069949979412509752591610110340945835351925556757786594481620095890463111797462492183974361264137524622749103
# 7^401+1, difficulty: 338.88, skewness: 1.74
# cost: 3.99241e+21, est. time: 1901147.22 GHz days (not accurate yet!)
# Optimized skew: 1.38938 Murphy: 2.08e-16
skew: 1.38938
c7: 1
c0: 49
Y1: -1481113296616977741464105532513750734030421355207
Y0: 1
type: snfs