2^1493-1

Open composite · C400

NFS Planning

GNFS Murphy estimate: 1.41e-26
SNFS Murphy raw: 4.42e-20
SNFS Murphy normalized (deg 6): 2.76e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.94957

Identifiers

Target expression: 2^1493-1
Target link: FactorDB page
Target ID: 1000000000000001493
Target changed: Before 6/8/2026
Parent query: Same as target
Parent ID: -
Cofactor token: C400
Imported: Jun 07, 2026, 01:40 AM UTC

Raw pmain126 Factorization

3788526319.9128086063638824541964831110329768544223. C400

SNFS Polynomial

Polynomial

Degree: 7
Raw Murphy: 4.42e-20
Normalized (deg 6): 2.76e-20
Skew: 0.94957
Selected: Best

n: 7923799749853670289770386078206106202504582446068607370018885778595455496250197897562370387623823289168002248292811654020809723819233204305281336540733688009838617395967873148507714285764301773968980076968306078804243751473804144916870636689995629767744832091801567541311923882996796834030765096011905776011456125481862083691546292564478218253781065484343953782859370682200480101132062515380370525743
# 2^1493-1, difficulty: 449.44, skewness: 1.22
# cost: 2.50638e+24, est. time: 1193516450.73 GHz days (not accurate yet!)
# Optimized skew: 0.94957 Murphy: 4.42e-20
skew: 0.94957
c7: 1
c0: -4
Y1: -13164036458569648337239753460458804039861886925068638906788872192
Y0: 1
type: snfs