Gigalum

Gigalum is equal to \(f_{10^9}(10)\) using the fast-growing hierarchy.My system of number names (FGS) - Traveling To The Infinity This term was coined by wiki user Denis Maksudov. The name "gigultun" is also equal to this number using Maksudov's system of naming googolisms, although this name isn't explicitly mentioned.
== Approximations ==
Notation 	Approximation
Hyper-E notation 	\(\textrm E3.489400997190992 \#10 \#\#(10^{9}-2)\)
Chained arrow notation	\(10 \rightarrow 11 \rightarrow (10^{9}-1)\)
BEAF 	\(\lbrace10,11,\lbrace10,9\rbrace-1\rbrace\)
==Etymology==
The two parts of the name, "gig" and "alum", mean \(10^9\) and "a finite ordinal" respectively. So the full name indicates the ordinal index of the FGH.
== Sources ==
Category:Numbers
Category:Up-arrow notation level
Category:Numbers by Denis Maksudov
Category:10-based FGH numbers