10-

10^389-1

Open composite · C270

NFS Planning

GNFS Murphy estimate: 4.88e-19
SNFS Murphy score: 3.17e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.69999

Identifiers

Target expression: 10^389-1
Target link: FactorDB page
Target ID: 1100000000013091491
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C270
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 1991681.9673567199.30613946219676519851696681.534106762532886493971950663223965323.295666607855148525951669299929669849601357.C270

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 3.17e-18
Skew: 1.69999
Selected: Best

n: 119289271643410661659011895607772139647921376305643327040133340560424162255590014476006522815032183459410826649812381782024580435488953253421188979709766709602606088795137550915161002646980490840248715831209139007534778111499928885914673593417099541437886281968493172159
# 10^389-1, difficulty: 391.10, skewness: 1.34
# cost: 9.5926e+22, est. time: 45679069.98 GHz days (not accurate yet!)
# Optimized skew: 1.69999 Murphy: 3.17e-18
skew: 1.69999
c7: 16
c0: -125
Y1: -1
Y0: 50000000000000000000000000000000000000000000000000000000
type: snfs