Image 1: Multiplication of the integers modulo 15 - A beautiful illustration showing the emergence of primes and symmetry of multiplication. The colors were chosen to start blue at 1 (cold) and fade to red at n (hot). White is used for zero (frozen), because it communicates the most information about prime factorization.
Image 2: Multiplication of the integers modulo 512.
The interactive version can be found here at ℤn Multiplication Visualizer βeta by Jared Deckard.
Shared at: Math.stackexchange.com743542/1