Seven years after Harry and Hermione first went to Hogwarts, their plans of world optimization face numerous challenges and powerful enemies.

Significant Digits is a novel-length fanfiction of Harry Potter and the Methods of Rationality written by Alexander Davis. It enriches the HPMOR universe with many characters, places, and story arcs. Significant Digits was referred to as "the best HPMOR continuation fic" by Eliezer Yudkowsky[1] and is a must-read for anyone who loves HPMOR.

Significant Digits can be read online or as an ePub on the official website.


While written in English, Significant Digits uses or refers to a great number of (real-world) languages:

On this wiki

Pages about Significant Digits concepts are sorted in Category:Significant Digits. Their name starts with "Digits!" (e.g. Digits!Harry Potter) and they should have the {{Multific}} template at the top.

To link to a "Digits!" page you can use the {{Digits}} template. For instance:

{{Digits|Lethe Touch}}


Lethe Touch

and links to

Digits!Lethe Touch


  1. According to this quote on Reddit