Very cool. I thought to myself, before clicking on the article, "this is Hacker News, so its probably some interesting number theoretic sieve... but then again there are a lot of people who like to cook so maybe its some kind of novel mechanical sieve". So it was quite satisfying to see discover that it was BOTH in some sense.
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[ 2.7 ms ] story [ 22.6 ms ] threadImpressive. I wondered how fast my computer could do it. Here's the GNU coreutils factor:
Still impressive. This led me down factor's documentation to the Pollard Rho algorithm: http://en.wikipedia.org/wiki/Pollard%27s_rho_algorithm