2+(odd)

2^1471+1

Open composite · C423

NFS Planning

GNFS Murphy estimate: 6.53e-28
SNFS Murphy score: 7.60e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.86096

Identifiers

Target expression: 2^1471+1
Target link: FactorDB page
Target ID: 1000000000012151495
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C423
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 87238974742151728369. C423

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 7.60e-20
Skew: 0.86096
Selected: Best

n: 249627147476276476875437714333485089921283570894847862997130795579052867323635034053835746580990447796824176926747676048645749036822853536711960565640513709055139423127025651313497077805194336355491856860015076324942507492972882101906581223273264490306976814194927189713944145240105390887787263545962522794343906856073680198047648445152210524518489717358239957554951054503657565641587185062529160462267429592518274998313307
# 2^1471+1, difficulty: 442.82, skewness: 1.10
# cost: 1.75382e+24, est. time: 835154635.41 GHz days (not accurate yet!)
# Optimized skew: 0.86096 Murphy: 7.60e-20
skew: 0.86096
c7: 1
c0: 2
Y1: -1645504557321206042154969182557350504982735865633579863348609024
Y0: 1
type: snfs