(Python)
from sympy import isprime
for n in range(1, 9):
for m in range(n-1, -1, -1):
l = ''.join([str(d) for d in range(n, m-1, -1)])
p = int(l+l[-2::-1], 9)
if isprime(p):
for m in range(n+1, 9):
l = ''.join([str(d) for d in range(n, m+1)])
p = int(l+l[-2::-1], 9)
if isprime(p):
