googol

num

1. The number 10¹⁰⁰, or ten to the power of a hundred. Equivalent to ten duotrigintillion (short scale), or ten sexdecilliard (long scale).

   “For example, in considering all the finite state grammars that use seven terminal symbols and seven auxiliary symbols (states), [...] he must test over a googol (10^100) candidates.”

   “If the universe were packed solid with neutrons, say, so there was no empty space anywhere, there would still only be about 10¹²⁸ particles in it, quite a bit more than a googol but trivially small compared to a googolplex.”