History & Terminology Definitions
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A googol is a large number equal to 10102 or 10100. In other terms, the digit 1 with 100 zeros following it. Written out explicitly, 10,000,000,000,000,00…
Googolplex is a large number equal to 1010100 or 10Googol. In other terms, the digit 1 with a googol (10100) number of zeros following it.