2^1319-1

Open composite · C307

NFS Planning

GNFS Murphy estimate: 3.49e-21
SNFS Murphy score: 2.70e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.05891

Identifiers

Target expression: 2^1319-1
Target link: FactorDB page
Target ID: 1000000000000001319
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C307
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

712292734142687.4561015525367423385817952015799767.528143874978418020442958250948319387628471.C307

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.70e-18
Skew: 1.05891
Selected: Best

n: 6669479906004349591624750998990926887428622484217127425536619682176225849099087384738655454235307885784707894436760639431686057175638411998476306364947828933476637985030336393135350684758136313497456134576986479382038528013942514925166433751553025095866401164644970672447564588495728291046924834620879071793
# 2^1319-1, difficulty: 397.06, skewness: 1.35
# cost: 1.35629e+23, est. time: 64585376.18 GHz days (not accurate yet!)
# Optimized skew: 1.05891 Murphy: 2.70e-18
skew: 1.05891
c7: 1
c0: -8
Y1: -392318858461667547739736838950479151006397215279002157056
Y0: 1
type: snfs