2+(4k)

2^1396+1

Open composite · C405

NFS Planning

GNFS Murphy estimate: 7.22e-27
SNFS Murphy score: 4.44e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.05417

Identifiers

Target expression: 2^1396+1
Target link: FactorDB page
Target ID: 1000000000012151420
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C405
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(4) 150769.6345222049. C405

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 4.44e-19
Skew: 1.05417
Selected: Best

n: 106332529814700278816492091775615735948506407277475193712412904946196195513471374112929257866582973627584206086683721830891012012711206506563389421890727590154032942792890006856936991979591702202100619798998274193819810667792116859261458683138004581493399612873029838661852631340376748785604263792721730472685419686890505301093555337761122012280639372295986391189821346758558166794062561674401990050422881
# 2^1396+1, difficulty: 420.24, skewness: 1.35
# cost: 5.0653e+23, est. time: 241204586.11 GHz days (not accurate yet!)
# Optimized skew: 1.05417 Murphy: 4.44e-19
skew: 1.05417
c7: 1
c0: 8
Y1: -803469022129495137770981046170581301261101496891396417650688
Y0: 1
type: snfs