Tekillion

Tekillion (formerly fortillion) is equal to \(10^{3\times 10^{3\times 10^{120}} + 3}\).Illion Numbers by Jonathan Bowers The term was coined by Jonathan Bowers.
=== Approximations in other notations ===
Notation 	Approximation
Up-arrow notation 	\(10 \uparrow (3 \times (10 \uparrow (3 \times (10 \uparrow 120)))+3)\) (exact)
Chained arrow notation	\(10 \rightarrow (3 \times (10 \rightarrow (3 \times (10 \uparrow 120)))+3)\) (exact)
BEAF 	\(\{10,\{3\times \{10,3 \times \{10,120\}\}+3\}\}\) (exact)
Fast-growing hierarchy	\(f^3_2(393)\)
=== Sources ===
=== See also ===
Category:Numbers
Category:Tier 3 -illion numbers
Category:Numbers by Jonathan Bowers
Category:Illion
Category:Class 4