The Ulam Spiral Pencil, text on cardboard Wall drawing, variable dimensions (here ca. 180 x 180 cm.)

Installation view, Phonogamous, Bergen National Academy of the Arts 2007

THE ULAM SPIRAL The Ulam Spiral was first found and made by the mathematician Stanislaw Ulam in 1963. Ulam was doodling on a scratch of paper during a scientific meeting, writing down a grid of numbers starting with 1 in the center and spiraling the numbers out. He circled all the prime numbers, and found that these numbers tend to line up in diagonals.