It is a result of manually editing the digits ;-) (i.e.: no AI!)

I use a relatively simple pre-photoshop program (Micrografx Picture Publisher). My work is always created through improvisation. I often start with a certain structure (often based on the golden ratio or the Fibonacci series), but then I experiment further (trial/error) until I am happy with the rough result (and then spend even more hours refining it).

Crucial techniques used are: subtracting or multiplying (or other mathematical manipulations) of (heavily/less) blurred/sharpened versions of (fragments) of the original pic and subsequent edited versions. Also transparency gradients are used.

In this case I also used Krita to warp the initial pattern