Octal-pipsqueak

An octal-pipsqueak is equal to 87 = 221 = 2,097,152. The term was coined by Sbiis Saibian.
== Approximations ==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(2.097153\times10^6\)	\(2.097153\times10^6\)
Arrow notation 	\(8\uparrow7\) 	\(8\uparrow7\)
Steinhaus-Moser Notation 	7[3] 	8[3]
Copy notation 	1[7] 	2[7]
Taro's multivariable Ackermann function	A(3,18) 	A(3,19)
Pound-Star Notation 	#*(88)*3 	#*(89)*3
BEAF 	{8,7} 	{8,7}
Bashicu matrix system 	(0)[1448] 	(0)[1449]
Hyperfactorial array notation 	9! 	10!
Fast-growing hierarchy 	\(f_2(16)\) 	\(f_2(17)\)
Hardy hierarchy 	\(H_{\omega^2}(16)\) 	\(H_{\omega^2}(17)\)
Slow-growing hierarchy 	\(g_{\omega^7}(8)\) 	\(g_{\omega^7}(8)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Numbers by Sbiis Saibian
Category:Numbers with 7 to 29 digits
Category:Powers of 2
Category:Guppy regiment