2+(4k)

2^1168+1

Open composite · C326

NFS Planning

GNFS Murphy estimate: 2.76e-22
SNFS Murphy score: 8.49e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.39046

Identifiers

Target expression: 2^1168+1
Target link: FactorDB page
Target ID: 1000000000012151192
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C326
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(16) 4673.1137948235396559809. C326

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 8.49e-17
Skew: 1.39046
Selected: Best

n: 11503502479109170561526729786545914030994736446305639343299508035437546385185894846930347235483174596744807382227213471187984109213542234055680384414446097475158896057332895786693308996151532855730570357358360286628627243508743950172575267341327069815802629578609869771521818812819023526560893508054052579914904795334095555073
# 2^1168+1, difficulty: 351.90, skewness: 1.10
# cost: 9.05475e+21, est. time: 4311787.96 GHz days (not accurate yet!)
# Optimized skew: 1.39046 Murphy: 8.49e-17
skew: 1.39046
c7: 1
c0: 2
Y1: -1
Y0: 187072209578355573530071658587684226515959365500928
type: snfs