2^1465-1

Open composite · C292

NFS Planning

GNFS Murphy estimate: 2.59e-20
SNFS Murphy score: 2.75e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.77734

Identifiers

Target expression: 2^1465-1
Target link: FactorDB page
Target ID: 1000000000000001465
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C292
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(5,293) 867281. 273540531464313955314852499316612415349762230038482231.C292

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.75e-17
Skew: 0.77734
Selected: Best

n: 8721912105863882140807338656023298160253314804305034646275845413466241980558488334335876234161234535662840758580714674445019976546253515339316664602049733038058454781268021302230707598352267265407275164256549758833748402754445276517600625070016918764670186340002477819551715548480573241494601
# 2^1465-1, difficulty: 352.81, skewness: 0.71
# cost: 9.57744e+21, est. time: 4560685.72 GHz days (not accurate yet!)
# Optimized skew: 0.77734 Murphy: 2.75e-17
skew: 0.77734
c8: 16
c6: 8
c4: 4
c2: 2
c0: 1
Y1: -1
Y0: 89202980794122492566142873090593446023921664
type: snfs