2+(odd)

2^1487+1

Open composite · C340

NFS Planning

GNFS Murphy estimate: 4.25e-23
SNFS Murphy score: 6.36e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.00586

Identifiers

Target expression: 2^1487+1
Target link: FactorDB page
Target ID: 1000000000012151511
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C340
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 321193.5112307.336634730815895563864259673163375963317776707.764306661921531071005607460370828744036933756498403.C340

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 6.36e-20
Skew: 1.00586
Selected: Best

n: 3378101812096586671463810503605882124303196384532172260999890464442478752856876479964892739854372741011274974198962685347301314585311715939396875997057610977284741135267871556722051141425969897348174622022717834907240668020363402880317069759590393782304745854289786767335618108102826059164425513569924125978838855789670246193390837661038233
# 2^1487+1, difficulty: 447.93, skewness: 1.09
# cost: 2.31168e+24, est. time: 1100800808.64 GHz days (not accurate yet!)
# Optimized skew: 1.00586 Murphy: 6.36e-20
skew: 1.00586
c8: 1
c0: 2
Y1: -1
Y0: 98079714615416886934934209737619787751599303819750539264
type: snfs