2^1349-1

Open composite · C367

NFS Planning

GNFS Murphy estimate: 1.16e-24
SNFS Murphy score: 1.30e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.55251

Identifiers

Target expression: 2^1349-1
Target link: FactorDB page
Target ID: 1000000000000001349
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C367
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(19,71) 40471.95905807. C367

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.30e-18
Skew: 1.55251
Selected: Best

n: 2557269681286339840985900009855675142250423691181722672419263414743784940130292138243452045328766642199442804885181038545593039511675186120342788732595753200396101011820984206817219169953960101745834618035859210758413557298191256576636876312291176918808055448892355855197242989238705987444236179776123348228270570059873693797224577650958531671198637808924007916569367
# 2^1349-1, difficulty: 406.69, skewness: 1.22
# cost: 2.35805e+23, est. time: 112288047.49 GHz days (not accurate yet!)
# Optimized skew: 1.55251 Murphy: 1.30e-18
skew: 1.55251
c7: 1
c0: -4
Y1: -1
Y0: 12554203470773361527671578846415332832204710888928069025792
type: snfs