Not a different version, "Fool's Biscuit" is an end game temporary upgrade for a business day "season" that makes it look like that. My guess is that Inspect Element was used to make it say that, as to my knowledge it just starts using exponential notation once it can display the numbers.
people say, "its not a big deal" play longer. use heavenly chips also, "infinity" cookies is probably to keep the numbers to go over the max. if it goes over the max it says: NaN cookies NaN means Not a Number you can't do anything but cheat in all the things after a hard reset.