There is no way to like count that in pretty much the universes time its probably constantly growing at that with every action same for the chess moves and the evolution moves. 10^953 may indeed be the limit rather than 10^999 or another number. The numbers cant exist higher at some Omega point, once you hit the threshold of how much information is going in and can come out.

10^999+663 is the 2nd Titanic Prime. Its probably where it begins with Quantum and Meta-Mathematics exists where we do not exist. If we wanted to understand Dark Matter and Energy we would look into the numbers more we would look into our quantum self, gets put into every single dimension possible with every choice as were always connected to these other quantum selves and the"time" is the dimension all of the quantum copies are connected. This suggests, some of these copies do in fact cross over to "our" dimension sometimes.