12-

12^337-1

Open composite · C265

NFS Planning

GNFS Murphy estimate: 9.52e-19
SNFS Murphy score: 3.65e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.12961

Identifiers

Target expression: 12^337-1
Target link: FactorDB page
Target ID: 1100000000013092079
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C265
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1) 150246814646321946446767942785606503.339309255680410415657068111365964544508075829804149997978999513.C265

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 3.65e-17
Skew: 1.12961
Selected: Best

n: 8615614391159860668314986309724057538208271412583091456242519041461192426146627020046854139634821579132304772893833980754740882425544111270787920459506115027014327734398783158511725495295520492126573603726875632365278018544863154948283157665202378652882465388671379
# 12^337-1, difficulty: 363.68, skewness: 1.43
# cost: 1.87023e+22, est. time: 8905871.76 GHz days (not accurate yet!)
# Optimized skew: 1.12961 Murphy: 3.65e-17
skew: 1.12961
c7: 1
c0: -12
Y1: -6319748715279270675921934218987893281199411530039296
Y0: 1
type: snfs