User blog comment:BlauesWasser/Hyper-Kefts Number/@comment-34700793-20180216030336

So, Kefts number is HKefts(3,3,3) = 3^^^^4 (Simplified thanks to Psicubed) then

HKefts(3^^^^4,3^^^^4,3^^^^4) = (3^^^^4)^^^^^2

Lets roughly simplify 3^^^^4 to 3{5}2 (Which is 3^^^^^2) then we have (3{5}2){5}2 = 3{5}4 and HKefts number is (3{5}4){5}2 which I believe is roughly 3{5}8, so, waaaaaay bigger than a googolplex.

The amount of zeroes? Well we can't say log(Hyper Kefts number) since Hyper kefts number isn't a multiple of even 10.

So, I'm using a graph and record the amount of zeroes in each expoment of 3 but unfortunately that doesn't help either.

So I'm just gonna guess ⌊log(Hyper Kefts number)/10⌋ and without saying hyper kefts number? Well roughy 3{5}8 which I figured out for the size of the number itself.