The Eratosthene sieve displaying 10x10 numbers [Le crible d'Eratosthène montrant 10x10 nombres entiers].

Starting from the lower left point, the spheres are numbered (1, 2, 3,...) on successive lines in order to build the Eratosthene sieve. The radius of the N-th sphere is proportional to the square root of the number of divisors of N. The number 1 and the prime numbers are visualized by means of white spheres (a smaller one for the number 1).

(CMAP28 WWW site: this page was created on 02/05/1999 and last updated on 04/26/2015 12:24:24 -CEST-)

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Copyright (c) Jean-François Colonna, 1999-2015.
Copyright (c) France Telecom R&D and CMAP (Centre de Mathématiques APpliquées) UMR CNRS 7641 / Ecole Polytechnique, 1999-2015.