using System;

public class Program

{

    public static void Main()

    {

        int i = 0, x = 0, num = 1;

        while(num < 100)

        {

            for(i=2, x=2; i<=num; i++, x++)

            {

                if(num % i == 0)

                    break;

            }

            if(x == num)

                Console.WriteLine(num + " es primo");

            num++;

        }

    }

}