We enabled our anti-censorship tools in Belarus so that Telegram remained available for most users there. However, the connection is still very unstable as Internet is at times shut off completely in the country.
Even if there are ever bigger numbers used in proofs, TREE(n) and all, Graham's constant should hold a special place in our hearts as the number used by one genius who wanted not just to prove results, but to make sure others could see what he did.