2+(4k)

2^1480+1

Open composite · C284

NFS Planning

GNFS Murphy estimate: 7.53e-20
SNFS Murphy score: 2.53e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.08177

Identifiers

Target expression: 2^1480+1
Target link: FactorDB page
Target ID: 1000000000012151504
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C284
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(8,40,296) 17761.1781921.164893484452858108324961802167006983685183459002021441.C284

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.53e-17
Skew: 1.08177
Selected: Best

n: 11767624646740736450249088836960445072301356395423033551801635654691104909605809790646358462588501568193631776061669836782208129482472897364075591296702948645248614546142953275913774348335020784777411648138764202812938049190297557719670310372243787106560601344601496566190461230287041
# 2^1480+1, difficulty: 356.42, skewness: 1.00
# cost: 1.19775e+22, est. time: 5703582.25 GHz days (not accurate yet!)
# Optimized skew: 1.08177 Murphy: 2.53e-17
skew: 1.08177
c8: 1
c6: -1
c4: 1
c2: -1
c0: 1
Y1: -1
Y0: 356811923176489970264571492362373784095686656
type: snfs