2LM

2^2650+1 M

Open composite · C256 · component M

NFS Planning

GNFS Murphy estimate: 3.17e-18
SNFS Murphy score: 2.33e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.77661

Identifiers

Target expression: 2^1325+1+2^663
Target value: 732393118024812130342688062225925427581732396703317402067462297825004568849598036744394870128011345264116690868259621562907256547383684245256020673558584698563148276893208188027431064708845306132118378570662451119236553447810095544030157596877009101566940187758471659049031656327450658166039103781458423942138496420739361651407052267564710896827884336437750397461898804154614899139566519992964874241
Target link: FactorDB page
Target ID: 1100000000001881774
Target changed: -
Parent query: 2^2650+1
Parent ID: -
Cofactor token: C256
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(10M,50L,106M,530L) 2180204703335720073601.3730504934273889884608382514281727901.C256

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.33e-16
Skew: 0.77661
Selected: Best

n: 1856395499581209757562992986949806514559339585418806095620998760702479008286835747835919705465581704061184829193287603997791049072364508530995769709586245815707652509831595273657627984330003960116411932913863962655661268723444494171488040026234917426859901
# 2^2650+1 Aurifeuillian M, difficulty: 319.09, skewness: 0.71
# cost: 1.10788e+21, est. time: 527559.82 GHz days (not accurate yet!)
# Optimized skew: 0.77661 Murphy: 2.33e-16
skew: 0.77661
c8: 16
c7: 16
c6: 8
c4: -4
c2: 2
c1: 2
c0: 1
Y1: -1
Y0: 5444517870735015415413993718908291383296
type: snfs