Fifty-fives

Fifty-fives is equal to \(5 \lfloor 10^{50} / 9\rfloor\), or 50 copies of 5:
:55,555,555,555,555,555,555,555,555,555,555,555,555,555,555,555,555
:can be represented hypermathematically with interior superscription as \(5^{48}5\).
It's also equal to \(\frac{5}{9}\times(10^{50}-1)\), and its prime factorization is 5 × 11 × 41 × 251 × 271 × 5,051 × 9,091 × 21,401 × 25,601 × 182,521,213,001 × 78,875,943,472,201.
== Approximations ==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(5.555\times10^{49}\) 	\(5.556\times10^{49}\)
Arrow notation 	\(118\uparrow24\) 	\(82\uparrow26\)
Steinhaus-Moser Notation 	32[3] 	33[3]
Copy notation 	5[50] 	5[50]
Taro's multivariable Ackermann function	A(3,162) 	A(3,163)
Pound-Star Notation 	#*(10,2,4,3,1)*8 	#*(6,3,1,2,5)*7
BEAF 	{118,24} 	{82,26}
Hyper-E notation 	5E49 	6E49
Bashicu matrix system 	(0)(0)(0)(0)[1285] 	(0)(0)(0)(0)[1286]
Hyperfactorial array notation 	41! 	42!
Fast-growing hierarchy 	\(f_2(157)\) 	\(f_2(158)\)
Hardy hierarchy 	\(H_{\omega^2}(157)\) 	\(H_{\omega^2}(158)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega+18}2}(20)\)	\(g_{\omega^{\omega+3}10}(30)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Numbers by André Joyce
Category:Numbers with 30 to 100 digits
Category:Odd numbers
Category:Repdigit numbers