Femtekillillion

The femtekillillion is equal to \(10^{3\left(10^{15,000}\right)+3}\).Sbiis Saibian's large numbers site The term was coined by Sbiis Saibian.
==Approximations==
Notation 	Lower bound 	Upper bound
Arrow notation 	\(1000\uparrow(1+10\uparrow15000)\) 	\(1000\uparrow(1+10\uparrow15000)\)
Down-arrow notation 	\(1000\downarrow\downarrow5001\) 	\(299\downarrow\downarrow6060\)
Steinhaus-Moser Notation 	5[3][3][3] 	6[3][3][3]
Copy notation 	2[2[15001]] 	3[3[15001]]
H* function 	H(H(4999)) 	H(H(4999))
Taro's multivariable Ackermann function	A(3,A(3,49829)) 	A(3,A(3,49830))
Pound-Star Notation 	#*((1))*((1))*46 	#*((1))*((2))*46
BEAF 	{1000,1+{10,15000}} 	{1000,1+{10,15000}}
Hyper-E notation 	E(3+3E15000) 	E(3+3E15000)
Bashicu matrix system 	(0)(1)[223] 	(0)(1)[224]
Hyperfactorial array notation 	(4639!)! 	(4640!)!
Fast-growing hierarchy 	\(f_2^3(12)\) 	\(f_2^3(13)\)
Hardy hierarchy 	\(H_{\omega^23}(12)\) 	\(H_{\omega^23}(13)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega^4+\omega^35}3+3}}(10)\)	\(g_{\omega^{\omega^{\omega^4+\omega^35}3+3}}(10)\)
==Sources==
Category: Tier 3 -illion numbers
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Illion
Category:Class 3
Category:Upper class 3