Hepteicosillion

The hepteicosillion is equal to \(10^{3\times 10^{81}+3}\) or \(10^{3\text{ sexvigintillion }3}\).Jonathan Bowers' 4 Tiered -illion Series - Pointless Large Number Stuff It is defined using Sbiis Saibian's generalization of Jonathan Bowers' -illion system.
==Approximations==
Notation 	Lower bound 	Upper bound
Arrow notation 	\(1000\uparrow(1+10\uparrow81)\) 	\(1000\uparrow(1+10\uparrow81)\)
Down-arrow notation 	\(1000\downarrow\downarrow28\) 	\(503\downarrow\downarrow31\)
Steinhaus-Moser Notation 	47[3][3] 	48[3][3]
Copy notation 	2[2[82]] 	3[3[82]]
H* function 	H(H(26)) 	H(H(26))
Taro's multivariable Ackermann function	A(3,A(3,269)) 	A(3,A(3,270))
Pound-Star Notation 	#*((1))*(3,0,0,3,2)*6 	#*((1))*(4,0,0,3,2)*6
BEAF 	{1000,1+{10,81}} 	{1000,1+{10,81}}
Hyper-E notation 	E(3+3E81) 	E(3+3E81)
Bashicu matrix system 	(0)(1)[16] 	(0)(1)[17]
Hyperfactorial array notation 	(58!)! 	(59!)!
Fast-growing hierarchy 	\(f_2(f_2(264))\) 	\(f_2(f_2(265))\)
Hardy hierarchy 	\(H_{\omega^22}(264)\) 	\(H_{\omega^22}(265)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega8+1}3+3}}(10)\)	\(g_{\omega^{\omega^{\omega8+1}3+3}}(10)\)
== Sources ==
Category:Numbers
Category:Illion
Category:Class 3
Category:Greek-based name
Category:Middle class 3
Category:Tier 2 -illion numbers