You know when you go into a train of thought, and go off on one?
I thought about that 2-3 times and thought of a few possibilities, and thought to myself, 'seems it works'
Now I am reading back what I've put - and even I have no idea. I wont bother deleting my post, ill let myself bask in my stupidness!
Maybe I was thinking, forget about the prime bit, that its the equation where the addition of 2 odd numbers, will result in an even number? That works?
/end <attempttoregainsomedignity>