2+(odd)

2^1147+1

Open composite · C317

NFS Planning

GNFS Murphy estimate: 9.18e-22
SNFS Murphy score: 1.36e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.38850

Identifiers

Target expression: 2^1147+1
Target link: FactorDB page
Target ID: 1000000000012151171
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C317
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,31,37) 305771849. C317

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.36e-16
Skew: 1.38850
Selected: Best

n: 63546125556876745765387621897419928632545659854249656513954491235251912246806501128870253316016124477487466226902095680505815748695015789978239375060087099313351180781577433434428048969223069080600086649735052864145452450626989681067652316019988066638268209639743328114439351732988556935618125472798393786772032055019
# 2^1147+1, difficulty: 345.58, skewness: 1.10
# cost: 6.09824e+21, est. time: 2903924.05 GHz days (not accurate yet!)
# Optimized skew: 1.38850 Murphy: 1.36e-16
skew: 1.38850
c7: 1
c0: 2
Y1: -1
Y0: 23384026197294446691258957323460528314494920687616
type: snfs