very interesting article
I have a variation of this compulsion but it has no religious aspect as far as I can tell.
I behave similarly to Cole in the way I use the number 5. I also feel compelled to keep footsteps and 'things' balanced as well as silently multiplying numbers in a strict way.
One of my (many) therapists indicated that this isn't too uncommon and that the number 6 is the most frquently used number.
BTW, it gets worse when under stress but I hide it pretty well. My wife will sometimes catch me forming imaginary 'balanced' pictures using window / door frames etc. Hard to explain really.