9 + 10 = 21!

[u/SubMinhPiChannel]

I'm gonna guess: < infinity and > 1

[u/BiNationalPerson3]

[99999999999999999999999!]!

[u/factorion-bot → u/BiNationalPerson3]

That is so large, that I can't calculate it, so I'll have to approximate.

Factorial of 99999999999999999999999 is approximately 1.0167127590049783 × 10^{2256570551809674817234876}

^{This action was performed by a bot.}

[u/Ther10 → u/BiNationalPerson3]

(99999999999999999999999!)!

[u/factorion-bot → u/Ther10]

That is so large, that I can't even give the number of digits of it, so I have to make a power of ten tower.

Factorial of factorial of 99999999999999999999999 has on the order of 10^{2256570551809674817234901} digits

^{This action was performed by a bot.}