2+(4k)

2^1424+1

Open composite · C398

NFS Planning

GNFS Murphy estimate: 1.84e-26
SNFS Murphy score: 2.28e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.05251

Identifiers

Target expression: 2^1424+1
Target link: FactorDB page
Target ID: 1000000000012151448
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C398
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(16) 73464178473865711374011713. C398

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.28e-19
Skew: 1.05251
Selected: Best

n: 96416562065384807130159168434967746874728306188738544798682674243680961334243979813150272447676540718393936372262881377716519195709781686212193516703260120362400655363620810425235096008199622727832325783233545048909577342518908479793367385046626167688359543701084254213172790539562613816790761710017460100093723724625866845801819332539654876024884223308131238244671212105044505810240988264209253057
# 2^1424+1, difficulty: 428.67, skewness: 1.35
# cost: 8.09041e+23, est. time: 385257602.20 GHz days (not accurate yet!)
# Optimized skew: 1.05251 Murphy: 2.28e-19
skew: 1.05251
c7: 1
c0: 8
Y1: -12855504354071922204335696738729300820177623950262342682411008
Y0: 1
type: snfs