New posts in Big Numbers

Sum of digits of sum of digits of sum of digits of $7^{7^{7^7}}$

Could someone tell me how large this number is?

explicit upper bound of TREE(3)

Is there a way to calculate absurdly high powers?

What is the "fastest" increasing function that's useful in some area of math?

Milton Green's lower bounds of the busy beaver function

Which is larger? $20!$ or $2^{40}$?

Logarithms of logarithms of Graham's number, is the result ever handy?

Ackermann function and $f_\omega$

Is there a way of intuitively grasping the magnitude of Graham's number?