The grand xappol is equal to {10,10 (2) 3} in BEAF.[1] The term was coined by Jonathan Bowers.


Notation Approximation
Bird's array notation \(\{10,10 [3] 3\}\)
Cascading-E notation \(E10\#\text{^}\#\#10\#\text{^}\#\#10\)
Hyperfactorial Array Notation \(10![1,[2,1,3],1,2]\)
Fast-growing hierarchy \(f_{(\omega^{\omega^2})2}(10))\)
Hardy hierarchy \(H_{\omega^{(\omega^{\omega^2}) 2}}(10)\)
Slow-growing hierarchy \(g_{\vartheta(\Omega^{\Omega^2}+\Omega^{\Omega\omega})}(10)\)


  1. Bowers, JonathanInfinity Scrapers. Retrieved January 2013.
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