2+(4k)

2^1412+1

Open composite · C424

NFS Planning

GNFS Murphy estimate: 5.71e-28
SNFS Murphy score: 2.93e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.55814

Identifiers

Target expression: 2^1412+1
Target link: FactorDB page
Target ID: 1000000000012151436
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C424
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(4) C424

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.93e-19
Skew: 1.55814
Selected: Best

n: 6666608568382191771766529129261148552693686656707787335786292002007549599517808976708778616448508700365859546573643123981344658461630610300729616307248833218902395203157642575868188060384810453025687998520019203092295063244647064615336351514881481185095413396867600586134231489811650228676880008807890945340457895806076666219769959777037713088242632248517046450873519877009034094796948357284224908832823074806599744681472241
# 2^1412+1, difficulty: 425.66, skewness: 1.22
# cost: 6.84887e+23, est. time: 326136603.34 GHz days (not accurate yet!)
# Optimized skew: 1.55814 Murphy: 2.93e-19
skew: 1.55814
c7: 1
c0: 4
Y1: -1
Y0: 6427752177035961102167848369364650410088811975131171341205504
type: snfs