2+(odd)

2^1367+1

Open composite · C371

NFS Planning

GNFS Murphy estimate: 6.77e-25
SNFS Murphy score: 8.90e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.95626

Identifiers

Target expression: 2^1367+1
Target link: FactorDB page
Target ID: 1000000000012151391
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C371
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 688969.83671337.12898178131.18101258329085891. C371

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 8.90e-19
Skew: 0.95626
Selected: Best

n: 79775455204410405574087447000370557121505677964813888212463707786774703026121114239652776060279198720091497070077084323891919676307824722188564117347813179995681979482838334491603128040178278978787630650285425100569011453019503437849502778821698729292595391166809291712564834900509777347966524303816104730260395277299179376699410743003215433861323360696611894748184538611
# 2^1367+1, difficulty: 411.51, skewness: 1.22
# cost: 3.10005e+23, est. time: 147621361.45 GHz days (not accurate yet!)
# Optimized skew: 0.95626 Murphy: 8.90e-19
skew: 0.95626
c7: 1
c0: 4
Y1: -50216813883093446110686315385661331328818843555712276103168
Y0: 1
type: snfs