2LM

2^2818+1 L

Open composite · C420 · component L

NFS Planning

GNFS Murphy estimate: 9.74e-28
SNFS Murphy score: 3.47e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.92020

Identifiers

Target expression: 2^1409+1-2^705
Target value: 14166543207812157515003874399679940674474084145504048088545870504266042898975344075506154559953080988277451536468991638460357399230965046889050434652903770590167589806709990473719899628317722212679586996855040806402802660545327060075878070716959030220716879778002087741590253017650327798431783711079439097965642589324457912319308197709583308306633869908008651047246042540077039975333288117095737678971422081282640401903124481
Target link: FactorDB page
Target ID: 1100000000001036836
Target changed: -
Parent query: 2^2818+1
Parent ID: -
Cofactor token: C420
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

129629. C420

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 3.47e-19
Skew: 0.92020
Selected: Best

n: 109285292703115487390968644359517860004120097705791513384704583883745480555858211322359615209197640869538849612887483807329821253199245900909907772588724518357524857915358372537934409957013648278391309019239836814314718624268698054261608673344383048706052501971025678988422752760958796244912663918408991027977093006383277756669481348383334811705975282598867931151563635761110862348188199531707701818045515133825304537589
# 2^2818+1 Aurifeuillian L, difficulty: 424.15, skewness: 0.92
# cost: 6.29981e+23, est. time: 299990885.74 GHz days (not accurate yet!)
# Optimized skew: 0.92020 Murphy: 3.47e-19
skew: 0.92020
c8: 2
c4: -2
c0: 1
Y1: -1
Y0: 95780971304118053647396689196894323976171195136475136
type: snfs