2+(odd)

2^1259+1

Open composite · C379

NFS Planning

GNFS Murphy estimate: 2.33e-25
SNFS Murphy score: 1.08e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.39861

Identifiers

Target expression: 2^1259+1
Target link: FactorDB page
Target ID: 1000000000012151283
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C379
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) C379

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.08e-17
Skew: 1.39861
Selected: Best

n: 3308592540316390699362831219788896413998687186961715954246238819886400877530848279956893743429922798424536900187899592015388350883586713443800578627801679217950226309900035968072631629200485086591389789755404730228326694853321227667160829348385575705125283840596250161660008934347869747373652404750480270972909362221762504904015361623361256290714915869946857102939199037728533163
# 2^1259+1, difficulty: 379.30, skewness: 1.10
# cost: 4.78756e+22, est. time: 22797912.74 GHz days (not accurate yet!)
# Optimized skew: 1.39861 Murphy: 1.08e-17
skew: 1.39861
c7: 1
c0: 2
Y1: -1
Y0: 1532495540865888858358347027150309183618739122183602176
type: snfs