wolframalpha-20110302114437560

Voronoi plot related to Mathematica plot of 250 primes on a Archimedean spiral.

 

ListPlot[({#1 Cos[2 Pi #1], #1 Sin[2 Pi #1]} & ) /@ Table[Sqrt[Prime[n]], {n, 1, 250}]]

 

en.wikipedia.org/wiki/Ulam_spiral#Sacks_spiral

Done