Here's a fun fact: There's a typo in his article [0].
I only learned about the typo when I asked him to sign my copy at a Christmas Tree lecture years ago. Instead of signing it, he corrected the typo. He had a mnemonic he used to remember the digits in a Potrzebie. He had the mnemonic stored on a file on his home machine. I watched him ssh to the machine, then fire up Emacs to look up the mnemonic.
I only learned about the typo when I asked him to sign my copy at a Christmas Tree lecture years ago. Instead of signing it, he corrected the typo. He had a mnemonic he used to remember the digits in a Potrzebie. He had the mnemonic stored on a file on his home machine. I watched him ssh to the machine, then fire up Emacs to look up the mnemonic.
[0] https://en.wikipedia.org/wiki/Potrzebie