A prime number is a positive integer greater than 1 that has no positive divisors other than 1 and itself. (Boy, that's a mouthful.) In other words, if you want to test if a number in a variable x is prime, then no other number should go into x evenly besides 1 and x. So 2 and 5 and 11 are all prime, but 4 and 18 and 21 are not. If there is a nu…

is_prime.py

def is_prime(x):
    if x < 2:
        return False
    elif x == 2:
        return True 
    else:
        for n in range(2, x):
            print n
            if x % n == 0:
                return False
        else:
            return True     

Thank you