2^1297-1

Open composite · C302

NFS Planning

GNFS Murphy estimate: 6.80e-21
SNFS Murphy score: 4.55e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.96024

Identifiers

Target expression: 2^1297-1
Target link: FactorDB page
Target ID: 1000000000000001297
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C302
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

12097392013313.64873964199444497.80025868895687041966359471596981171570268166357936741924913.C302

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 4.55e-18
Skew: 0.96024
Selected: Best

n: 43442197631617918168521283821276003803569882463906254025417431402333635280962971602835396836811343120842182796260469317690698798584201731708707752743878816444773007730353250594338303179549680346329799178897487869537769252187899495320766195182488752269433941785750760225404276485623805209840284661949247
# 2^1297-1, difficulty: 390.44, skewness: 1.22
# cost: 9.22941e+22, est. time: 43949586.85 GHz days (not accurate yet!)
# Optimized skew: 0.96024 Murphy: 4.55e-18
skew: 0.96024
c7: 1
c0: -4
Y1: -49039857307708443467467104868809893875799651909875269632
Y0: 1
type: snfs