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There are approximately 700,000,000 distance-20 positions.

Inspired by Jerry Bryan's recent Cubelovers article, I decided to run a few large randomly-selected cosets such that optimal solutions were found for *all* positions (rather than just proving all positions were within 20, as I usually do). From this, I hoped to gain some insight into how long it would take to enumerate the entire cube space and find counts for every distance. I also hoped to get an estimate for the total count of 20s in the entire cube space.

I first wrote a program to select a random coset, and then set those cosets to running, specifying a maximum search ply of 18. This way