2^1249-1

Open composite · C326

NFS Planning

GNFS Murphy estimate: 2.76e-22
SNFS Murphy score: 1.35e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.06347

Identifiers

Target expression: 2^1249-1
Target link: FactorDB page
Target ID: 1000000000000001249
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C326
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

97423.52358081.2379005273.9345276045907272726364012481. C326

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.35e-17
Skew: 1.06347
Selected: Best

n: 85473566484780536849113470725560109171329373541435654783474020453048645871388403740238734953806331925399382382828945556844130181545410434064164995865606048643790006342735964550551397697395101711700580594812021302956140944656900651114238065987702512364776194439873327839051914493452388729456974353389295230194274236838027387769
# 2^1249-1, difficulty: 375.99, skewness: 1.35
# cost: 3.93004e+22, est. time: 18714489.73 GHz days (not accurate yet!)
# Optimized skew: 1.06347 Murphy: 1.35e-17
skew: 1.06347
c7: 1
c0: -8
Y1: -383123885216472214589586756787577295904684780545900544
Y0: 1
type: snfs