12^398+1

Open composite · C252

NFS Planning

GNFS Murphy estimate: 5.40e-18
SNFS Murphy score: 2.09e-19
Preferred method: GNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.82473

Identifiers

Target expression: 12^398+1
Target link: FactorDB page
Target ID: 1100000000009444678
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C252
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(2) 797.93650411717.4494221167633.8307648416096684429.7465150571668272469793937571561.8042266592311608019489537916771081060300765453.667078835293010531171821677040286135658528495637281437.C252

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.09e-19
Skew: 1.82473
Selected: Best

n: 201870641749381979580453917276816481549822669647693855611343347428677436003055266695594275487021598789129553761816872237267889694792416643963147775003317467974198734396722258633465253375559360994695252256548243247856733821709030948272475612595809471093
# 12^398+1, difficulty: 430.59, skewness: 1.43
# cost: 8.99736e+23, est. time: 428445915.85 GHz days (not accurate yet!)
# Optimized skew: 1.82473 Murphy: 2.09e-19
skew: 1.82473
c7: 1
c0: 12
Y1: -1
Y0: 32608515250675223026511755668970197078205534606659017288712192
type: snfs