5^551+1

Open composite · C345

NFS Planning

GNFS Murphy estimate: 2.18e-23
SNFS Murphy score: 5.81e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 2.00824

Identifiers

Target expression: 5^551+1
Target link: FactorDB page
Target ID: 1000000000016637319
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C345
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1,19,29) 1103.155383. C345

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 5.81e-18
Skew: 2.00824
Selected: Best

n: 133685534500521294680159033501686113748588227650864293171327315888358886773020203197671411534000584830441015164541990469608123380238333367621683719406639343850997863929989536913788666210388902706653215195236000492360986612115170053834979248322477545055158626490288988612210672785663545422581369249471100007448536059044675735865855272702718582169
# 5^551+1, difficulty: 386.53, skewness: 1.58
# cost: 7.34149e+22, est. time: 34959476.13 GHz days (not accurate yet!)
# Optimized skew: 2.00824 Murphy: 5.81e-18
skew: 2.00824
c7: 1
c0: 25
Y1: -1
Y0: 16543612251060553497428173841399257071316242218017578125
type: snfs