import sympy as sym
import time

start=time.time()
a=10
b=20
i=0

for n in range(-10000,10000):
    fn=n**3+a*n**2+b*n
    if sym.isprime(fn) == True:
        i += 1
        print("回数=",i,"n=",n,"素数=",fn)

end=time.time()
run_time=end-start
print("実行時間=",run_time)