2+(odd)

2^1283+1

Open composite · C371

NFS Planning

GNFS Murphy estimate: 6.77e-25
SNFS Murphy score: 6.29e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 0.96106

Identifiers

Target expression: 2^1283+1
Target link: FactorDB page
Target ID: 1000000000012151307
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C371
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 7699.614532189347. C371

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 6.29e-18
Skew: 0.96106
Selected: Best

n: 11732328817085927947636540572791626636399246467214041292777053509690773259653720815673933210732906636199861691340313396981063148846619375908412256433270489226860431761213228630329583745056768261511170665217065855781265380356620682140805582816300738793653749748711727155993406975343190059914126933512749172688749963009592137598878552304585825047598980309100936224172817251
# 2^1283+1, difficulty: 386.22, skewness: 1.22
# cost: 7.20936e+22, est. time: 34330279.04 GHz days (not accurate yet!)
# Optimized skew: 0.96106 Murphy: 6.29e-18
skew: 0.96106
c7: 1
c0: 4
Y1: -12259964326927110866866776217202473468949912977468817408
Y0: 1
type: snfs