2+(odd)

2^1163+1

Open composite · C297

NFS Planning

GNFS Murphy estimate: 1.33e-20
SNFS Murphy score: 9.71e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.87705

Identifiers

Target expression: 2^1163+1
Target link: FactorDB page
Target ID: 1000000000012151187
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C297
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 59301371.10534255862017.116877740332519011737292886104457. C297

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 9.71e-17
Skew: 0.87705
Selected: Best

n: 571956894435689929061694610297567535688974309230165697564831222903954454374870096733394377734097527039850802996987841715468663533413844762672759856432523032669623976754438233801641474179527964420952354049187999601650584360443051194902453358720747055303157330407198595091585098433581133027197095497
# 2^1163+1, difficulty: 350.10, skewness: 1.10
# cost: 8.0913e+21, est. time: 3852998.08 GHz days (not accurate yet!)
# Optimized skew: 0.87705 Murphy: 9.71e-17
skew: 0.87705
c7: 1
c0: 2
Y1: -93536104789177786765035829293842113257979682750464
Y0: 1
type: snfs