num=int(input("Enter a number: "))
if num == 1:
    print(num,"Is not a prime number.")
elif num > 1:
    for i in range(2, (num//2)+1):
        if (num % i) == 0:
            print(num, "is not a prime number")
            break
    else:
        print(num, "is a prime number")
else:
    print(num, "is not a prime number")