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The Fibonad, coined by SuperJedi224, is equal to the 500th term in the fibonacci sequence (D being the roman numeral for 500), starting from the first one.[1][2]

Its full decimal expansion is:

139,423,224,561,697,880,139,724,382,870,407,283,950,070,256,587,697,307,264,108,962,948,325,571,622,863,290,691,557,658,876,222,521,294,125

Its prime factorization is 3 × 53 × 11 × 41 × 101 × 151 × 251 × 401 × 3001 × 570601 × 112128001 × 1353439001 × 28143378001 × 5465167948001 × 84817574770589638001 × 158414167964045700001.

Approximations

Notation Lower bound Upper bound
Scientific notation $$1.394\times10^{104}$$ $$1.395\times10^{104}$$
Arrow notation $$34\uparrow68$$ $$5\uparrow149$$
Steinhaus-Moser Notation 58[3] 59[3]
Copy notation 1[105] 2[105]
Chained arrow notation $$34→68$$ $$5→149$$
Taro's multivariable Ackermann function A(3,342) A(3,343)
Pound-Star Notation #*(7,4,11,7,4,3,3)*9 #*(8,4,11,7,4,3,3)*9
PlantStar's Debut Notation [61] [62]
BEAF {34,68} {5,149}
Hyper-E notation E[34]68 E[5]149
Bashicu matrix system (0)(0)(0)(0)(0)[1796] (0)(0)(0)(0)(0)[1797]
Bird's array notation {34,68} {5,149}
Hyperfactorial array notation 72! 73!
Strong array notation s(34,68) s(5,149)
Fast-growing hierarchy $$f_2(337)$$ $$f_2(338)$$
Hardy hierarchy $$H_{\omega^2}(337)$$ $$H_{\omega^2}(338)$$
Slow-growing hierarchy $$g_{\omega^{54}47}(79)$$ $$g_{\omega^{\omega+9}49}(51)$$

Sources

Fibonacci Numbers by SuperJedi224
Level One
Fibonax · Fibonaxix · Fibonal · Fibonad · Fibonamij
Level Two

Numbers By SuperJedi224

Fibonacci Numbers

Level One

Level Two

#*

#**

H#*

#*{}

#*<<>>

H#*<<>>

Bingol series

Based on the Faxul

Other factorials

Googovipleccix family

Graham Sequence Numbers

-Illion numbers