C#

static bool prime_6(int a, int B)/>/>
{
    int x;
    x = 2; // this number will divide number a and b to check if they are prime numbs.

        if (a < 1000 && b < 1000) //setting an exception
        {
            if (a % x != 0 && x < a) // Checking if number a is a prime number.
            {
            }
            if (b % x != 0 && x < B)/>/> // Checking if number b is a prime number.
            {
                x++;                   // Adding +1 to x
                return is_sexy(a, B)/>/>; // Launching back the function
            }

            return (a - b == 6); // Once it's done (if number a and b are prime, test if a - b = 6)
        }

        else
        {
            return false; // Otherwise false

    }

}