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