11+

11^391+1

Open composite · C316

Target FactorDB

NFS Planning

GNFS Murphy estimate
1.05e-21
SNFS Murphy raw
5.14e-18
SNFS Murphy normalized (deg 6)
2.01e-18
Preferred method
SNFS
SNFS possible
Yes
SNFS degree
8
SNFS skew
1.22691

Identifiers

Target expression
11^391+1
Target link
FactorDB page
Target ID
1000000000017212359
Target changed
Before 6/8/2026
Parent query
Same as target
Parent ID
-
Cofactor token
C316
Imported
Jun 07, 2026, 01:43 AM UTC

Raw pmain126 Factorization

(1,17,23) 11731.127529535636495445322031215834626173176416149233. C316

SNFS Polynomial

Degree
8
Raw Murphy
5.14e-18
Normalized (deg 6)
2.01e-18
Skew
1.22691
Selected
Best
n: 2710615537832278092256977093902708165683603861057905381231875444744083736482467012353411816223958088889614941996741345283242805520381516100690515610418930413863726152943642436939900807079713320563171449164250078730575306467050715639138662509305059877925163179440498984112925638724820048894145929294903040077510588107
# 11^391+1, difficulty: 383.23, skewness: 1.00
# cost: 6.04484e+22, est. time: 28784954.41 GHz days (not accurate yet!)
# Optimized skew: 1.22691 Murphy: 5.14e-18
skew: 1.22691
c8: 1
c7: -1
c6: -7
c5: 6
c4: 15
c3: -10
c2: -10
c1: 4
c0: 1
Y1: -895430243255237372246531
Y0: 801795320536133573571931534665380233173841533962
type: snfs