2^1283-1

Open composite · C347

NFS Planning

GNFS Murphy estimate: 1.67e-23
SNFS Murphy score: 6.29e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.96106

Identifiers

Target expression: 2^1283-1
Target link: FactorDB page
Target ID: 1000000000000001283
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C347
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

4824675346114250541198242904214396192319. C347

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 6.29e-18
Skew: 0.96106
Selected: Best

n: 34515672696764900836786177233300410555530455786248271137586766713939870900519768858392322520387786816193296414343681919513098611199539150568488930008649307580590947951765161932505385845147113426744189538754736551735477008121866077714481687615964211932550168634787196099422863723244956328923278432150671582094212391809285302483867669910335043327553
# 2^1283-1, difficulty: 386.22, skewness: 1.22
# cost: 7.20936e+22, est. time: 34330279.04 GHz days (not accurate yet!)
# Optimized skew: 0.96106 Murphy: 6.29e-18
skew: 0.96106
c7: 1
c0: -4
Y1: -12259964326927110866866776217202473468949912977468817408
Y0: 1
type: snfs