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A mental random number generator

19 hours ago
https://www.johndcook.com/blog/2025/09/10/mental-rng/
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  • #random-number-generation
  • #George-Marsaglia
  • #DIEHARD
  • George Marsaglia was a prominent figure in random number generation.
  • He developed the DIEHARD battery of tests for RNG quality.
  • Marsaglia created a mental RNG method that is simple but effective.
  • The method is better than humans trying to make up random numbers.
  • A Python implementation of his RNG was provided, with a note on a potential correction.
  • The method outputs a single digit, despite the state being a two-digit number.
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