>>95
After reading >>23 and doing some experiments I've started my `E' case when r >= n + 1.5(n)^.5 I was able to compute 10^8 in 2 minutes, but I think that's it for me. To go any further would require basically just copying because I completely lack the skills to go beyond this. I'll be reading though.
(hofstadter (expt 10 8))
=> 5000934571821489
;; 5000934571821489