12-

12^377-1

Open composite · C338

NFS Planning

GNFS Murphy estimate: 5.55e-23
SNFS Murphy score: 4.11e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.42319

Identifiers

Target expression: 12^377-1
Target link: FactorDB page
Target ID: 1100000000013092201
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C338
Imported: Jun 03, 2026, 04:32 PM UTC

Raw pmain126 Factorization

(1,13,29) 9803.2477244896771659299793. C338

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 4.11e-18
Skew: 1.42319
Selected: Best

n: 15197850429281374501002759083729571281370910710620829980523843548942934841455773681754116681677066632541301834113659599619996145742832022002347779303381088017477400347451665801553945515570403710920125264261490511040248948924814718820549228511301247661543890644607947633121126014221985684700480907878722892363299694910147188849446708285839
# 12^377-1, difficulty: 375.56, skewness: 1.00
# cost: 3.82998e+22, est. time: 18238016.27 GHz days (not accurate yet!)
# Optimized skew: 1.42319 Murphy: 4.11e-18
skew: 1.42319
c6: 1
c5: 1
c4: -5
c3: -4
c2: 6
c1: 3
c0: -1
Y1: -19781359483314150527412524285952
Y0: 391302183008102676318141068027642364938466415279908207464546305
type: snfs