mildly interesting: factoring numbers, self-similarly.

a friend of mine sent me the link to these animated factorisation diagrams, which are captured below as stills.

primes are displayed as circles ..

whereas for each factor, like the 5's in 250 or the 2's and 3's in 216, another level of  self-similarity is added.

admittedly i kept waitingfor another power of 2 or 3, just to see more iterations of four-corner sets and sierpinski-type triangles .. (-: