2+(odd)

2^1427+1

Open composite · C367

NFS Planning

GNFS Murphy estimate: 1.16e-24
SNFS Murphy score: 2.13e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.41252

Identifiers

Target expression: 2^1427+1
Target link: FactorDB page
Target ID: 1000000000012151451
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C367
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 693523.5628089.731608372748801729113.82718003338869891126095447587.C367

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.13e-19
Skew: 1.41252
Selected: Best

n: 5240612191149360060109327237966704716852691855514791932195056521093800403631916910409968104890122121833243062013404413163578269824866394246471862203995675421473184644778285970948822137053329152968462979245583852515791348964997140189954034729007339178649934713738946344596782544609997427170766510213270394013131073421538629571545213491446428699634923961914140252870899
# 2^1427+1, difficulty: 429.87, skewness: 1.10
# cost: 8.6462e+23, est. time: 411723967.55 GHz days (not accurate yet!)
# Optimized skew: 1.41252 Murphy: 2.13e-19
skew: 1.41252
c7: 1
c0: 2
Y1: -1
Y0: 25711008708143844408671393477458601640355247900524685364822016
type: snfs