# This asks for numbers and determines
# if they are prime

done = False
while not done:
    num = eval(input( "Gimme a number: " ))
    if num == 0:
        done = True
    else:
        isPrime = True
        for divisor in range(2, num):
            if num % divisor == 0:
                isPrime = False
        if isPrime:
            print( "%d is prime!" %num )
        else:
            print( "%d is not prime."% num )