12-

12^313-1

Open composite · C283

NFS Planning

GNFS Murphy estimate: 8.60e-20
SNFS Murphy score: 2.21e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.27640

Identifiers

Target expression: 12^313-1
Target link: FactorDB page
Target ID: 1100000000013092016
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C283
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1) 251653.6291301.46831805567.59873266690305132380666276323091. C283

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.21e-16
Skew: 1.27640
Selected: Best

n: 1244574492033594110067057504395171256162024411550226750921437925720304646379662604398704714091098993457088007728300068587815525917181031573869846456204456064759486829026231836763785084521848852212850246838296450229622703227839244667499144583261155007237725608536684043704120022854521
# 12^313-1, difficulty: 338.74, skewness: 1.02
# cost: 3.95541e+21, est. time: 1883527.90 GHz days (not accurate yet!)
# Optimized skew: 1.27640 Murphy: 2.21e-16
skew: 1.27640
c7: 8
c0: -9
Y1: -1
Y0: 1828630994004418598357041151327515417013718614016
type: snfs