Video still: Carl Sagan in his video on the Googolplex

The largest number with a word naming it is a “googolplex.” This is the equivalent of 10 to the power of a googol—or 10 to the power of 10100.   The term googol was coined in 1938 by 9-year-old Milton Sirotta, the nephew of mathematician Edward Kasner.  Kasner then extended the name to this larger number.

Watch a video by astronomer Carl Sagan about the googolplex, which is entertaining both because of its subject matter and because it looks so dated.

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