2LM

2^2482+1 L

Open composite · C292 · component L

NFS Planning

GNFS Murphy estimate: 2.59e-20
SNFS Murphy score: 9.22e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.98024

Identifiers

Target expression: 2^1241+1-2^621
Target value: 37863836749836624519685721051661259620651479953327743006663194502484140901918582305414891167792390423864786913161082367119465075114288865399939483197803640952494350165176803223487453031918235929356988035800527972725410228338306689254219848937481425691323142769563338438900262441196149987150711286409925877622160851686858351566008583870783469307017327395097499213318481510401
Target link: FactorDB page
Target ID: 1100000000003077181
Target changed: -
Parent query: 2^2482+1
Parent ID: -
Cofactor token: C292
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(34L,146L) 1989316024702257101057.3940639336036781180053103392398337.C292

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 9.22e-18
Skew: 0.98024
Selected: Best

n: 3916976792890831081044189640147942449249368307147373095200447500338609591872107640485256155954884613060991964267672678003284846387984401860071588188854279312545020898810349711363787008218078430606125207075927853205274692356496341100050428241391202011472563013876591481151779805941677522906369
# 2^2482+1 Aurifeuillian L, difficulty: 373.58, skewness: 0.92
# cost: 3.40229e+22, est. time: 16201398.98 GHz days (not accurate yet!)
# Optimized skew: 0.98024 Murphy: 9.22e-18
skew: 0.98024
c8: 2
c4: -2
c0: 1
Y1: -1
Y0: 45671926166590716193865151022383844364247891968
type: snfs