The grand petafaxul is equal to ((...((200!)!)!...)!)![1] (with petafaxul ()'s), or 200!200!6+1 using Nested Factorial Notation. The term was coined by Lawrence Hollom.

Etymology Edit

The name of this number is based on the word "grand" and the number "petafaxul".


  1. Lawrence Hollom's large numbers site
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