2+(odd)

2^1349+1

Open composite · C298

NFS Planning

GNFS Murphy estimate: 1.16e-20
SNFS Murphy score: 1.30e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.55251

Identifiers

Target expression: 2^1349+1
Target link: FactorDB page
Target ID: 1000000000012151373
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C298
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,19,71) 2699.13689459054475670977741385063031707.229255396247029955050947439811944013696396843.C298

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.30e-18
Skew: 1.55251
Selected: Best

n: 3515411982368115298216326951322486467987925263753780313886047916524536742297457307954994978522857235442949872764617661039433665044281255213515813973990896463527936289857374085130481426361041088485672636247502816229571397065350743038051015590696773346304007513991734464399362910666229261504063682401
# 2^1349+1, difficulty: 406.69, skewness: 1.22
# cost: 2.35805e+23, est. time: 112288047.49 GHz days (not accurate yet!)
# Optimized skew: 1.55251 Murphy: 1.30e-18
skew: 1.55251
c7: 1
c0: 4
Y1: -1
Y0: 12554203470773361527671578846415332832204710888928069025792
type: snfs