Engineering Memory: Thoughts on learning to memorize first 100 digits of pi

This describes learning to memorize the first 100 digits of pi by turning memory into an engineering problem. Inspired by mnemonic practice, the narrator explains that human memory struggles only with meaningless, context-free data and thrives on vivid, structured associations. The technique used is elaborative encoding: the method of loci for spatial memory and a person-action-object (PAO) system that maps every two-digit pair to a person, an action, and an object. Six digits are encoded as a single “glyph” (person doing an action to an object), so 100 digits required seventeen glyphs placed in a familiar memory palace. Building the PAO - choosing distinct, memorable people, actions, and objects and cataloguing them in a spreadsheet - was the most time-consuming part; once established, encoding the 100 digits took about an hour and was practiced via Anki.

The write-up reports practical advantages and predictable failure modes: recall errors are local to single glyphs (often decade-level confusions from adjacent palace loci) rather than catastrophic global breakdowns, it’s trivial to pause and resume or to recite the sequence backward, and the system scales to many more digits with organizational effort. Beyond technique, the exercise is presented as proof that average memory can be trained systematically, reshaping one’s beliefs about personal limits.