using System;

public class Program

{

    public static bool IsPrime(long number)

    {

        if (number <= 1) return false;

        if (number == 2) return true;

        if (number % 2 == 0) return false;

​

        var boundary = (int)Math.Floor(Math.Sqrt(number));

​

        for (int i = 3; i <= boundary; i += 2)

            if (number % i == 0)

                return false;

​

        return true;        

    }

    public static void Main()

    {

        long res = 0;

        long product = 0;

        //Iterates through

        for(int i = 0; i < 80; i++)

        {

            res = (long)Math.Pow(i , 2) - (79 * i) + 1601;

            Console.WriteLine(res + " Is Prime? " + IsPrime(res));

        }

    }

}