7^493-1

Open composite · C375

NFS Planning

GNFS Murphy estimate: 3.97e-25
SNFS Murphy score: 2.90e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.22020

Identifiers

Target expression: 7^493-1
Target link: FactorDB page
Target ID: 1000000000018628971
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C375
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1,17,29) 16763. C375

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.90e-18
Skew: 1.22020
Selected: Best

n: 205410855685563333685445724050365814101142957767541043130428707262640029117983693498187891365242273984009999691490931990302677063694131186878081107835775431815501164866159449954091543930272827296039417195928185860135986728312434498673870783573737497636280296920443189999068773840414047990028612954113983733111101141340934550090781189128656108185581585787768685781254724687027
# 7^493-1, difficulty: 392.13, skewness: 1.00
# cost: 1.01856e+23, est. time: 48502839.22 GHz days (not accurate yet!)
# Optimized skew: 1.22020 Murphy: 2.90e-18
skew: 1.22020
c8: 1
c7: 1
c6: -7
c5: -6
c4: 15
c3: 10
c2: -10
c1: -4
c0: 1
Y1: -3219905755813179726837607
Y0: 10367793076318844190248738727596255138212949486450
type: snfs