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Randomness Testing Guide

Randomness Testing Guide

3 comments

·November 4, 2025

jap

There was originally a bug in the GAlib random number generator... if I remember correctly, the guy who identified it told me this was found (or demonstrated) by making a scatter plot of generated numbers an observing there was a pattern to the data.

guytv

If you take the UTF-8 binary for “hello world” and paste it there, it passes 4 out of 5 randomness tests.

Strange.

(0110100001100101011011000110110001101111001000000111011101101111011100100110110001100100)

cnnlives9099

It looks like there is some repetition in the binary representation to me. English language phrases in UTF-8 are not going to look random.