Python script that checks if a number is Prime

is_prime.py

import math

user_num = raw_input("Enter a number: ")
num = int(user_num)
limit = int(math.sqrt(num))

result_list = []

for i in range(2,limit+1):
    prime_test = num % i
    result_list.append(prime_test)

if all(i > 0 for i in result_list) == True:
    print num, "is a prime number"
else:
    print num, "is not a prime number"