2^1447-1

Open composite · C360

NFS Planning

GNFS Murphy estimate: 2.94e-24
SNFS Murphy score: 1.60e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.07112

Identifiers

Target expression: 2^1447-1
Target link: FactorDB page
Target ID: 1000000000000001447
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C360
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

57881.1754380423.135870799392023187135247.329476003535938830704093614193630509247.C360

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 1.60e-19
Skew: 1.07112
Selected: Best

n: 856631435641652097983331949395130972414349984918134546384458186357154008655372818285098415757558724780631919155634142527119631720357811565971652978354806353043246788790922518340580718818779649118786595588047680872812920535007229585877563009894870311687811359411312900628148886444280632562856541662314251609495658955563532828619181232758356396480759694285870081
# 2^1447-1, difficulty: 435.89, skewness: 1.09
# cost: 1.2033e+24, est. time: 573000680.88 GHz days (not accurate yet!)
# Optimized skew: 1.07112 Murphy: 1.60e-19
skew: 1.07112
c8: 1
c0: -2
Y1: -1
Y0: 3064991081731777716716694054300618367237478244367204352
type: snfs