2+(odd)

2^1465+1

Open composite · C249

NFS Planning

GNFS Murphy estimate: 8.07e-18
SNFS Murphy score: 3.47e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.76980

Identifiers

Target expression: 2^1465+1
Target link: FactorDB page
Target ID: 1000000000012151489
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C249
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,5,293) 175955291.1755093252481.460582595816216641.31062872124540581292691906293211.6762588977493594654927865733933851.C249

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 3.47e-17
Skew: 0.76980
Selected: Best

n: 195163043225345058175308943528336235609763817332302779101368026967030511750914990122682995064082697378178330713566287169274344156160240361176803915396580962859887810062492043165422783360867111550865650019279583640463507317440460807150054129188060801
# 2^1465+1, difficulty: 352.81, skewness: 0.71
# cost: 9.57744e+21, est. time: 4560685.72 GHz days (not accurate yet!)
# Optimized skew: 0.76980 Murphy: 3.47e-17
skew: 0.76980
c8: 16
c6: -8
c4: 4
c2: -2
c0: 1
Y1: -1
Y0: 89202980794122492566142873090593446023921664
type: snfs