2LM

2^2558+1 M

Open composite · C364 · component M

NFS Planning

GNFS Murphy estimate: 1.72e-24
SNFS Murphy score: 4.34e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.17804

Identifiers

Target expression: 2^1279+1+2^640
Target value: 10407932194664399081925240327364085538615262247266704805319112350403608059673360298012239441732324184842421613954281007791383566248323464908139906605677320762924129509389220345773183349661583555035400038169885029852865282847839803760191008632998190870924866784586328037215803090941066922037624610533228375441475532891845242402136433741394277751092239121730861260979670793429895415332865
Target link: FactorDB page
Target ID: 1100000000000447795
Target changed: -
Parent query: 2^2558+1
Parent ID: -
Cofactor token: C364
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(2) 1146568796702009883941. C364

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 4.34e-18
Skew: 1.17804
Selected: Best

n: 1815491966047178657044535741848751943114614259127066258441108828170709864571616613434283172195030018787744840288380215707797211890766846835963746221059753664406449538420739444260979480065377313557556433492074947652110739306249225892921017363435261918117069811407081397570391099649534722872900934527081698067551494743924654720154854426488725374950242067927628399753
# 2^2558+1 Aurifeuillian M, difficulty: 385.32, skewness: 1.09
# cost: 6.83624e+22, est. time: 32553503.70 GHz days (not accurate yet!)
# Optimized skew: 1.17804 Murphy: 4.34e-18
skew: 1.17804
c8: 1
c4: 2
c0: 2
Y1: -1
Y0: 1461501637330902918203684832716283019655932542976
type: snfs