2+(odd)

2^1393+1

Open composite · C241

NFS Planning

GNFS Murphy estimate: 2.35e-17
SNFS Murphy score: 1.67e-17
Preferred method: Similar
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.42108

Identifiers

Target expression: 2^1393+1
Target link: FactorDB page
Target ID: 1000000000012151417
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C241
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,7,199) 256313.1368560238473.11330553673168339.3289969796136070205317374419.57163295951034451899579310266706609258494395563988575843.C241

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 1.67e-17
Skew: 1.42108
Selected: Best

n: 8370502114250282130498871892197533451195925316441201602556228320353747135501955827177263289708619245866883822594984584928467675183883887103498112208207648832791363619527873419670887608057086577503226859986441125392837917892890410639229952057
# 2^1393+1, difficulty: 359.43, skewness: 1.00
# cost: 1.44161e+22, est. time: 6864796.77 GHz days (not accurate yet!)
# Optimized skew: 1.42108 Murphy: 1.67e-17
skew: 1.42108
c6: 1
c5: -1
c4: 1
c3: -1
c2: 1
c1: -1
c0: 1
Y1: -1
Y0: 803469022129495137770981046170581301261101496891396417650688
type: snfs