2+(odd)

2^1417+1

Open composite · C311

NFS Planning

GNFS Murphy estimate: 2.04e-21
SNFS Murphy score: 7.50e-19
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.42865

Identifiers

Target expression: 2^1417+1
Target link: FactorDB page
Target ID: 1000000000012151441
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C311
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,13,109) 2803463651.28889343049318360649.506440460076644299164281057539863983172316568782153.C311

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 7.50e-19
Skew: 1.42865
Selected: Best

n: 49882893617383550518583314715502560140001964071262136679991627369042144040127992494358625469342038860192710599492606901774987672602728687809929038527975224962149852954548167706116842731387382486822078298990668798566712971813203959400225270621945925909724423095767631667135444895098247093344034453252425679415953
# 2^1417+1, difficulty: 393.75, skewness: 1.00
# cost: 1.11937e+23, est. time: 53303549.45 GHz days (not accurate yet!)
# Optimized skew: 1.42865 Murphy: 7.50e-19
skew: 1.42865
c6: 1
c5: -1
c4: -5
c3: 4
c2: 6
c1: -3
c0: -1
Y1: -649037107316853453566312041152512
Y0: 421249166674228746791672110734681729275580381602196445017243910145
type: snfs