2+(4k)

2^1372+1

Open composite · C334

NFS Planning

GNFS Murphy estimate: 9.48e-23
SNFS Murphy score: 2.74e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.41850

Identifiers

Target expression: 2^1372+1
Target link: FactorDB page
Target ID: 1000000000012151396
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C334
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(4,28,196) 120737.18159793.400190449. C334

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 2.74e-17
Skew: 1.41850
Selected: Best

n: 1169652644349296168681797560113291201489912139709693580223988524717298069794946019507926078480065422354467490195148492245514650909078764666023588130651209234025422861346964637226374098697352244997281477847220814657847075015483827009434703346144100193382662144001144409020003242924045464322145135487420078505327417619889608056298543809
# 2^1372+1, difficulty: 354.01, skewness: 1.00
# cost: 1.03202e+22, est. time: 4914381.26 GHz days (not accurate yet!)
# Optimized skew: 1.41850 Murphy: 2.74e-17
skew: 1.41850
c6: 1
c5: -1
c4: 1
c3: -1
c2: 1
c1: -1
c0: 1
Y1: -1
Y0: 100433627766186892221372630771322662657637687111424552206336
type: snfs