7^485-1

Open composite · C311

NFS Planning

GNFS Murphy estimate: 2.04e-21
SNFS Murphy score: 5.57e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.38192

Identifiers

Target expression: 7^485-1
Target link: FactorDB page
Target ID: 1000000000018628923
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C311
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1,5,97) 137465249067521. C311

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 5.57e-17
Skew: 0.38192
Selected: Best

n: 20536834033887769758653940549120909134437693281235832757937653432847151790171924996200200484989942830716907022217354033960269776570094434778865508307043792382645153625573593335051688142945949000649457726885669726848039683854648312137066184188690790274148711023738226348395192249887604679331841057444237373767681
# 7^485-1, difficulty: 327.90, skewness: 0.38
# cost: 1.97103e+21, est. time: 938584.80 GHz days (not accurate yet!)
# Optimized skew: 0.38192 Murphy: 5.57e-17
skew: 0.38192
c8: 2401
c6: 343
c4: 49
c2: 7
c0: 1
Y1: -1
Y0: 36703368217294125441230211032033660188801
type: snfs