Googolplex is a large number equal to (i.e., 1 with a googol
number of 0s written after it).
The term was coined in 1938 after 9-year-old Milton Sirotta, nephew of Edward Kasner, coined the term "googol" and Kasner extended
it to this larger number (Kasner 1989, pp. 20-27; Bialik 2004).