2^1493-1

Open composite · C400

NFS Planning

GNFS Murphy estimate: 1.41e-26
SNFS Murphy score: 5.90e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.20935

Identifiers

Target expression: 2^1493-1
Target link: FactorDB page
Target ID: 1000000000000001493
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C400
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

3788526319.9128086063638824541964831110329768544223. C400

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 5.90e-20
Skew: 1.20935
Selected: Best

n: 7923799749853670289770386078206106202504582446068607370018885778595455496250197897562370387623823289168002248292811654020809723819233204305281336540733688009838617395967873148507714285764301773968980076968306078804243751473804144916870636689995629767744832091801567541311923882996796834030765096011905776011456125481862083691546292564478218253781065484343953782859370682200480101132062515380370525743
# 2^1493-1, difficulty: 450.34, skewness: 1.30
# cost: 2.63079e+24, est. time: 1252755122.62 GHz days (not accurate yet!)
# Optimized skew: 1.20935 Murphy: 5.90e-20
skew: 1.20935
c8: 1
c0: -8
Y1: -1
Y0: 196159429230833773869868419475239575503198607639501078528
type: snfs