Heptakulus

Heptakulus is equal to \(7 \& 7 \& 7 \& 7 \& 7 \& 7 \& 7 = \{7,7/2\}\) using the array of operator and BEAF. The term was coined by Cookie Fonster. The number is derived from triakulus and the Greek word "hepta" for seven. It is possibly the largest named googolism which is a perfect power, but neither a square nor a cube. 
HaydenTheGoogologist2009 calls this number Quarter Pounder (named after ).Hayden's Big Numbers. Retrieved 2022-08-07. 
== Approximations in other notations ==
Since this number hasn't been formalized, these are expectations.
Notation 	Approximation
Bird's array notation	\(\{7,7 [1 [1 [1 [1 [1 [2 \backslash_{5} 6 \backslash_{6} 2] 2] 2] 2] 2] 2] 2\}\)
Fast-growing hierarchy (using this system
of fundamental sequences)	\(f_{\psi_0(\Omega_5^{\Omega_5^5})}(7)\)
== Sources ==
== See also ==
Category:Numbers
Category:Higher array notation
Category:BEAF
Category:Powers of 7
Category:Numbers by Cookie Fonster
Category:Class disputed
Category:Unformalised