If Mohammed was a prophet, did anything he prophesied happen. In other words has be had as much success as Nostradamus.
More successful I think. Nostradamus predicted tons of stuff, never let up with the "This will befall" and the "This is nailed on." Mathematical certainty he'd get something right. Monkeys and typewriters. Mohammed, on the other hand, predicted that his cult would attempt to gain absolute power by browbeating, torturing and slaughtering its opponents and it's being going pretty much that way ever since.