kat.py

def defined_range(user_input):
    if 1 <= user_input <= 10000:
        return True
    else:
        return False

print "Please give me a number between 1 and 10000 to find if it is prime "

while True:
    user_input = int(raw_input('Please input your number '))
    if defined_range(user_input) == True:
        div = user_input - 1
        result = True
        while(div > 1):
            if user_input % div == 0:
                print "This number is divisible by " + str(div)
                result = False
            div = div - 1
        if result == False:
            print "This is not prime"
        if result == True:
            print "This is a prime"
        break