Triangoogol

Triangoogol is equal to trn100(2), where trn(n) is the n-th triangular number. The term was coined by wiki user Allam948736. It is 163,489,217,887,235,173,465,886,368,894 (or approximately \(1.635\times 10^{29}\)) digits long.
== Approximations ==
Notation 	Lower bound 	Upper bound
Arrow notation 	\(10\uparrow10\uparrow29\) 	\(2\uparrow2\uparrow99\)
Down-arrow notation 	\(10\downarrow\downarrow30\) 	\(2\downarrow\downarrow100\)
Steinhaus-Moser notation 	21[3][3] 	22[3][3]
BEAF 	{10, {10, 29}} 	{2, {2, 99}}
Copy notation 	1[1[30]] 	2[2[30]]
Fast-growing hierarchy 	\(f_2(f_2(92))\) 	\(f_2(f_2(93))\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{29}}}(10)\)	\(g_{\omega^{\omega^{29}2}}(10)\)
Hardy hierarchy 	\(H_{\omega^2\times2}(92)\) 	\(H_{\omega^2\times2}(93)\)
Hyper-E notation 	E29#2 	E[2]99#2
Hyperfactorial array notation	(26!)! 	(27!)!
== Decimal expansion ==
The partial decimal expansion of this number is:
== Sources ==
Category:Numbers
Category:Class 3
Category:Middle class 3
Category:Odd numbers