Prime or Not

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {

            int n = int.Parse(Console.ReadLine());
            var prime = true;
            for (int i = 2; i <= Math.Sqrt(n); i++)
            {
                if(n % i == 0)
                {
                    prime = false;
                    break;
                }
            }
            if (prime)
                Console.WriteLine("Prime");
            else
                Console.WriteLine("Not prime");
        }
    }
}