12-

12^367-1

Open composite · C388

NFS Planning

GNFS Murphy estimate: 6.99e-26
SNFS Murphy score: 2.84e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.14151

Identifiers

Target expression: 12^367-1
Target link: FactorDB page
Target ID: 1100000000013092166
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C388
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1) 11321951. C388

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.84e-18
Skew: 1.14151
Selected: Best

n: 9208806412745710467307848363380683472367749430900676988342860584021963131651580312380845466886256684139975314948456233341021225786674348564353239535105763542280027264049041114740473190209692870621653693775344668743381980951243530410516041946088630264532669189643448302109388742302988837520966355728477338047423647793192115248394598527741679761862076645238853025164580204960689858486753987
# 12^367-1, difficulty: 396.36, skewness: 1.45
# cost: 1.3026e+23, est. time: 62028790.30 GHz days (not accurate yet!)
# Optimized skew: 1.14151 Murphy: 2.84e-18
skew: 1.14151
c7: 2
c0: -27
Y1: -262092618720061913471834455929865910157901994973789683712
Y0: 1
type: snfs