2+(4k)

2^1384+1

Open composite · C363

NFS Planning

GNFS Murphy estimate: 1.97e-24
SNFS Murphy score: 5.69e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.55566

Identifiers

Target expression: 2^1384+1
Target link: FactorDB page
Target ID: 1000000000012151408
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C363
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(8) 166081.112392313590113.165888988402561.1130582443252921249. C363

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 5.69e-19
Skew: 1.55566
Selected: Best

n: 469250255105267583913592424190259700053054040860851045366477689751761521984323197705213209909105180273646861600889043911909447179036940863175183099971818194909989615548423315994130232411445341009299906872536791240750257401335594622667355628394809117782952344051414881040698330632992972325989253338847237525495400173135973289411226732076705130889545958175232364993
# 2^1384+1, difficulty: 417.23, skewness: 1.22
# cost: 4.27936e+23, est. time: 203779205.90 GHz days (not accurate yet!)
# Optimized skew: 1.55566 Murphy: 5.69e-19
skew: 1.55566
c7: 1
c0: 4
Y1: -1
Y0: 401734511064747568885490523085290650630550748445698208825344
type: snfs