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