12-

12^347-1

Open composite · C345

NFS Planning

GNFS Murphy estimate: 2.18e-23
SNFS Murphy score: 1.36e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.83512

Identifiers

Target expression: 12^347-1
Target link: FactorDB page
Target ID: 1100000000013092116
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C345
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1) 220663649769943822513977215399. C345

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.36e-17
Skew: 1.83512
Selected: Best

n: 123244882824659416606697462821926725866955526454048016013947982153808502716051086641053853139334609861392948049960058903346438747391326008073298926382558390133999409626052755763859301151433886735043238753755164403713644387265875529028253488703647527923985809353681343211359183741878135309914276276981628297519718288663502951248966147642396559963
# 12^347-1, difficulty: 375.91, skewness: 1.45
# cost: 3.91148e+22, est. time: 18626104.99 GHz days (not accurate yet!)
# Optimized skew: 1.83512 Murphy: 1.36e-17
skew: 1.83512
c7: 2
c0: -27
Y1: -1
Y0: 455021907500107488666379263767128316246357630162829312
type: snfs