dwitter.net | #primes

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u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas.
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  • Prime fun 3 / 3 - when X is less than Y, then X modulo Y gives X, so we see the normal vertical prime stripes, white shows X is a prime. not sure about the rest, there seems to be a large white line around the line where X equals Y, #math #primes

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  • Prime fun 2 / 3 - Normally X binary XOR with Y produces a single white line, but if we only draw black when X XOR Y is a prime number, then we get a pattern. #math #primes

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  • Prime fun 1 / 3 - This is the standard X&Y (binary AND) Sierpinski triangle picture but only where X & Y is a prime number. perhaps revealing a relationship between primes and binary AND #math #primes
  • u/donbright
    (note white = X&Y is prime, black = X&Y is composite)
  • u/andrea270872
    this is really nice. retro and mathsy at the same time!

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remix of d/16018 by u/joe.m

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  • List of #prime #primes, stored in an array. Best in fullscreen view.

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  • Factorization of a random integer into #prime products

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  • prime o'clock in the morning

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  • Sieve of Eratosthenes. Throws primes less than 65536. Row Y Column X stays unfilled if 256*Y+X is prime. #math

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