2+(odd)

2^1439+1

Open composite · C260

NFS Planning

GNFS Murphy estimate: 1.86e-18
SNFS Murphy score: 1.49e-19
Preferred method: GNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.72281

Identifiers

Target expression: 2^1439+1
Target link: FactorDB page
Target ID: 1000000000012151463
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C260
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 20147.448969.5640881.137253021484417.63180494870190538956091.751979368522107343300643.2408869127973305483719946359217514790113633539.544975758281808131044300018470837520689015348998003.C260

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.49e-19
Skew: 1.72281
Selected: Best

n: 11608271943299462041382301692653775243620794930277996499765961229215766821545872459524302839022207884488723191167694399243891942312822234353983355388836029465991354336175323784092986166337050014316672212965029544098983557625163386464234430649025671667106705673
# 2^1439+1, difficulty: 434.09, skewness: 1.35
# cost: 1.09002e+24, est. time: 519058837.82 GHz days (not accurate yet!)
# Optimized skew: 1.72281 Murphy: 1.49e-19
skew: 1.72281
c7: 1
c0: 8
Y1: -1
Y0: 102844034832575377634685573909834406561420991602098741459288064
type: snfs