Buenos Aires Constant

Numberphile videos often "nerd snipe" me, and it's happened again. If I had tagging on my posts I'd be able to provide a link here to all my Numberphile-related posts. Maybe someday. I tried to make this Numberphile diversion a super quick one.

The Numberphile video in question here is a few years old. It's titled "2.920050977316", and it introduces the "Buenos Aires Constant," which is a decimal number that generates the sequence of primes.

This constant was first described by four Numberphile viewers in a (paywalled) formal paper. The paper was "Received Sep 16th 2017, Accepted May 29th 2018, Published online: Jan 30th 2019" and the Numberphile video was released Nov. 26th 2020, so it took quite a while to surface for public discussion.

The video demonstrated using the constant to generate primes, and how to calculate the constant given the primes. What they didn't discuss, however, is how many primes can be generated for some number of decimal places. I wanted to find that out, and also to calculate the constant for myself, so I fired up the text editor and wrote some Python code.

Red and Black Knights

Numberphile has recently published a video on YouTube called "Red & Black Knights". The idea is to explore what happens when knights of two factions are placed on a chessboard according to a few simple rules.

I wrote some python code so I could see it in action for myself.

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I recently watched an Oregon Public Broadcasting video on YouTube called "The search for Oregon's tallest tree".

This video was originally aired on OPB in October 2017.

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I've been working on NFL Elo models for the past few years, and noticed week 10 seems to have an awful lot of upsets.