There must be some mathematic, alorithmic, whatevermajigic thing that one does to find whatever the whatever, but something plus two that becomes a prime number is what the problem is looking for right? Like maybe 17 and 2? But not 19 and 2 right because 21 is divisible by 3 and 7?
Whatever this thread is making me hate math more. Have fun mathing and maybe you'll find more whatever math funamajig. I'm out. (For the night at least.)