Part Two is also well worth a look, but you need to have watched Part One.
Here's a slower look at the sequence Charlie Turner put together in Part Two.
The videos feature Matt Parker and Charlie.
Matt's book - as discussed - can be found here.
More Matt on Numberphile can be found via this playlist.
The book has been updated from last year with a whole new chapter, new cover, and fewer typos, according to Hannah.
The copies signed by Hannah and her co-author Dr Thomas Oléron Evans have been sent to top Numberphile Patreon supporters (you will have been messaged if one is coming!)
However if you'd like to buy the book, it's available all over the place... Or you can use the Amazon affiliate links below.
It's not just a fun book - it's great to support the work of people like Hannah who have always been generous with their time for Numberphile.
Looking for stocking fillers? Other Numberphile collaborators with great books include...
It was okay. Not amazing.
In 1996, James McKee was a mathematician departing Trinity Hall, at Cambridge.
Following the tradition of bestowing a farewell gift on the college, McKee devised a prime number with 1350 digits (the college being founded in 1350).
The numbers, when viewed in the configuration below, also depicted the Trinity Hall logo.
Here's the video:
Since it was published, I've seen the following number (I assume prime, I've not checked) which depicts the Hello Internet Nail and Gear logo. It was published on the r/HelloInternet subreddit.
Email me others via numberphile at gmail dot com
While much of the country was clouded over, we go lucky with clouds and saw it from the University of Nottingham's campus in Ningbo.
While my videos do it no justice, it was one of the most extraordinary things I've seen. Don't miss out if you have the chance!
I also uploaded some raw footage here.
And more extras.
The image below is a favourite of mine because it shows the Moon's shadow over Ningbo, where we were filming (and it shows Australia, my homeland!)
More pictures from China below. Click to enlarge them.
I traveled with astronomer Amanda Bauer.