User blog comment:MachineGunSuper/My axiom about the biggest number/@comment-80.98.179.160-20171218203046/@comment-80.98.179.160-20171221185459

Define then f(n,k)=n₵kn.

Then define f(n)=f(n,n).

Then calculate ff(9999₵₵₵₵9999)(99999!₵99999!99999)₵₵₵₵₵999999999.