Ulam Spiral

Lumen & Logic

The prime spirals: integers written along Ulam's square spiral or Sacks' Archimedean spiral (r = √n, θ = 2π√n), with primes lit as stars. What should be random organises into diagonal streaks and parabolic arcs — the fingerprints of prime-rich quadratic polynomials. Composites fade by their number of prime factors, twin primes carry halos, and Euler’s n² + n + 41 can be picked out in gold. Zero randomness in the field — the pattern is discovered, not drawn.

Medium

Generative algorithm, archival pigment print

Dimensions

90 × 90 cm