11-

11^371-1

Open composite · C217

NFS Planning

GNFS Murphy estimate: 5.79e-16
SNFS Murphy score: 2.16e-16
Preferred method: Similar
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.40727

Identifiers

Target expression: 11^371-1
Target link: FactorDB page
Target ID: 1000000000019012239
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C217
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1,7,53) 743.214214659.13336046891357.38409989043771558204606815619197773.33809377349761925687097185807199956582768778310391.C217

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 2.16e-16
Skew: 1.40727
Selected: Best

n: 2708810573963796866138593345749551211564667666896303883020788782668268285997418666185581881610968575229773133509734431372648104842825958555711710504746909659408822126309834517656776816882498787126832498106855864586003
# 11^371-1, difficulty: 331.16, skewness: 1.00
# cost: 2.43459e+21, est. time: 1159327.99 GHz days (not accurate yet!)
# Optimized skew: 1.40727 Murphy: 2.16e-16
skew: 1.40727
c6: 1
c5: 1
c4: 1
c3: 1
c2: 1
c1: 1
c0: 1
Y1: -1
Y0: 15624722518287446627037310616316692383878522699200314331
type: snfs