cstutoringcenter.com_Sum of Primes

#!/usr/bin/env python
import math
def isPrime(num):
        if num % 2 == 0:return 0
        for x in range(2, int(math.ceil(math.sqrt(num)))+1):
                if ((num % x) == 0):return 0
        return 1

total = 0
for x in xrange(5000, 1, -1):
        if(isPrime(x) == 1):total = total + x
print total + 2