10-

10^391-1

Open composite · C312

NFS Planning

GNFS Murphy estimate: 1.79e-21
SNFS Murphy score: 1.35e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.23672

Identifiers

Target expression: 10^391-1
Target link: FactorDB page
Target ID: 1100000000013091492
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C312
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1,17,23) 7039.15641.140346818465014013770407271092917. C312

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 1.35e-17
Skew: 1.23672
Selected: Best

n: 582457787504144010846034178763367963371457093675064298586819261810129142154723315858513277290072654373070745469177052052880822940574640586689014532978529942206882570499926432729371377211767933324869178260672332744743973734009449816597458689380215880302617592161669486120314323649534120601529963437161653781155277
# 10^391-1, difficulty: 368.00, skewness: 1.00
# cost: 2.43093e+22, est. time: 11575864.79 GHz days (not accurate yet!)
# Optimized skew: 1.23672 Murphy: 1.35e-17
skew: 1.23672
c8: 1
c7: 1
c6: -7
c5: -6
c4: 15
c3: 10
c2: -10
c1: -4
c0: 1
Y1: -100000000000000000000000
Y0: 10000000000000000000000000000000000000000000001
type: snfs