2+(4k)

2^1436+1

Open composite · C401

NFS Planning

GNFS Murphy estimate: 1.23e-26
SNFS Murphy score: 1.76e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.86262

Identifiers

Target expression: 2^1436+1
Target link: FactorDB page
Target ID: 1000000000012151460
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C401
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(4) 8785395480624879362557878359873. C401

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.76e-19
Skew: 0.86262
Selected: Best

n: 12731029830798629466248567696700004227076030773326258513146562255034291511640277339200618090015521954836648674161568819317998414654100959201367408256737183711827889849765819504285014158088461194465915919697612560495223507522969075038864440856521330190293310600335353931237493095240548737618395217985342326216537388971621741489903064392778345480303219628945926347515399713687326535122857194058550631857
# 2^1436+1, difficulty: 432.28, skewness: 1.10
# cost: 9.87164e+23, est. time: 470078333.27 GHz days (not accurate yet!)
# Optimized skew: 0.86262 Murphy: 1.76e-19
skew: 0.86262
c7: 1
c0: 2
Y1: -51422017416287688817342786954917203280710495801049370729644032
Y0: 1
type: snfs