2+(odd)

2^1325+1

Open composite · C314

NFS Planning

GNFS Murphy estimate: 1.37e-21
SNFS Murphy score: 2.74e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.78318

Identifiers

Target expression: 2^1325+1
Target link: FactorDB page
Target ID: 1000000000012151349
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C314
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,5,25,53,265) C314

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.74e-16
Skew: 0.78318
Selected: Best

n: 12149528920569298081363679878744260348484036317412099163080551310474126757864275594190311438060861641677257605362491533485746531102769478991220804965832088965739875314307795444218373043144546268140079087075942527363319168156524006899925114900971394339698565161606591848828206415434925235527489999712589717667053601
# 2^1325+1, difficulty: 319.09, skewness: 0.71
# cost: 1.10788e+21, est. time: 527559.82 GHz days (not accurate yet!)
# Optimized skew: 0.78318 Murphy: 2.74e-16
skew: 0.78318
c8: 16
c6: -8
c4: 4
c2: -2
c0: 1
Y1: -1
Y0: 5444517870735015415413993718908291383296
type: snfs