2^1477-1

Open composite · C315

NFS Planning

GNFS Murphy estimate: 1.20e-21
SNFS Murphy score: 2.25e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.43116

Identifiers

Target expression: 2^1477-1
Target link: FactorDB page
Target ID: 1000000000000001477
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C315
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(7,211) 8863.35449.2065461814637063313713705681.19236737976418728476595440431.C315

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 2.25e-18
Skew: 1.43116
Selected: Best

n: 801378067085012768969765110351263008399580564277890274129556265122503965808678380637715116154577407399233782203286755544507015106145462072994362338751829329764721910725853418899462098418398001499543328313313816026576434646384093754272980799056211608534822645543484293397650318114863752643535635122386926947851343287
# 2^1477-1, difficulty: 381.10, skewness: 1.00
# cost: 5.32941e+22, est. time: 25378159.47 GHz days (not accurate yet!)
# Optimized skew: 1.43116 Murphy: 2.25e-18
skew: 1.43116
c6: 1
c5: 1
c4: 1
c3: 1
c2: 1
c1: 1
c0: 1
Y1: -1
Y0: 3291009114642412084309938365114701009965471731267159726697218048
type: snfs