Heptacthulhum

Heptacthulhum (also called hexacthularxihect) is equal to E100#^^^^^#100 = E100#{5}#100 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.
==Etymology==
The name of this number is based on the words "heptation" and "".
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(\{X,X,1,4\}\ \&\ 100\) (Non-climbing)
\(\{X,X,5\}\ \&\ 100\) (Climbing)
Bird's array notation 	\(\{100,100 [1 [1\neg3] 1 [1\neg3] 1 [1\neg3] 2] 2\}\) (Nested Hyper-nested Array Notation)
\(\{100,100 [1 [1 \backslash 2 \neg 2] 1 [1 \backslash 2 \neg 2] 1 [1 \backslash 2 \neg 2] 2]2\}\) (Hierarchial Hyper-nested Array Notation)
Hyperfactorial array notation	\(100![1(1)1(1)1(1)2]\)
Fast-growing hierarchy 	\(f_{\varphi(3,0,0)}(99)\)
Hardy hierarchy 	\(H_{\varphi(3,0,0)}(100)\)
Slow-growing hierarchy 	\(g_{\vartheta(\Omega_{2}3)}(100)\)
==Sources==
ru:Хептактхулхум
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Bachmann's collapsing level
Category:Hexacthulhum series