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The kyrillion is equal to \(10^{3\times 10^{3\times 10^{3\times 10^{3\times 10^{120}}}}+3}\).[1][2] The term was coined by Nirvana Supermind.

Approximations

Notation Approximation
Arrow notation \(10\uparrow(3\times 10\uparrow(3\times10\uparrow(3\times10\uparrow(3\times 10\uparrow 120) ) )+3)\) (exact)
Hyper-E notation E120#5
Fast-growing hierarchy \(f^5_2(394)\)

Sources

See also

2-entry series:
3-entry series:
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