2+(odd)

2^1187+1

Open composite · C334

NFS Planning

GNFS Murphy estimate: 9.48e-23
SNFS Murphy score: 5.16e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.69693

Identifiers

Target expression: 2^1187+1
Target link: FactorDB page
Target ID: 1000000000012151211
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C334
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 626523937064728884681163. C334

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 5.16e-17
Skew: 1.69693
Selected: Best

n: 1118268083984733670248651203144447574497089479418591957244125001338169516001084295802471643537072962789288095560527439784887430412912390972318658097273022504545390262965167494383742212869692761110212625412207928493427884167847439689828861037669273071289027849362826937383205429134833348961049648580882287031301742009991769424370931361
# 2^1187+1, difficulty: 358.23, skewness: 1.35
# cost: 1.33876e+22, est. time: 6375063.78 GHz days (not accurate yet!)
# Optimized skew: 1.69693 Murphy: 5.16e-17
skew: 1.69693
c7: 1
c0: 8
Y1: -1
Y0: 1496577676626844588240573268701473812127674924007424
type: snfs