Hannah's Book

Thanks to Numberphile regular Hannah Fry for supplying some signed copies of her Christmas mathematics book - The Indisputable Existence of Santa Claus.


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.

UK link: http://amzn.to/2jDnPRV
US link: http://amzn.to/2B2NoA6

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...

Steve Mould and Helen Arney (this is a new one - check it!):
http://amzn.to/2ja3WxA (UK)
http://amzn.to/2zSGMpC (US)

Alex Bellos books: http://amzn.to/2hNMLFA

And of course Matt "Parker Square" Parker:
http://amzn.to/2hLg5wt (UK)
http://amzn.to/2jEQfe0 (US)

Artistic Prime Numbers

This week we posted a video on Numberphile about a very unusual prime number.

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.

Screen Shot 2017-09-09 at 21.49.59.png

It has 2014 digits, the year of our first podcast episode.

I also noted this prime (?) on the r/geek subreddit, depicting the reddit alien Snoo.

Screen Shot 2017-09-09 at 21.57.05.png

And it continues, including here and here.

I think it is becoming bit of a craze!

Here's Matt Parker.


Email me others via numberphile at gmail dot com

Solar Eclipse in 2009

As I write, there is plenty of interest in solar eclipses because they're about to witness one in the United States.

I won't be there, but did travel to see one in China in 2009.

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.

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.

A Tim at Base Camp

From Rebecca...

Hey Brady,
Three years ago back in November of 2014 I had the opportunity to attend the Random Acts of Intelligence event in Huntsville, Alabama. I couldn’t believe you all were travelling across the world to a city an hour north of mine (Birmingham, Alabama) and I had a blast at the event. Afterwards there was a signing, but as you and Grey were so popular I got Derek and Henry’s signatures first then waited for yours, but as I got near to your desk the Huntsville center kicked everyone out into the cold fall night, shuffling the lines and causing me to return home before meeting you.
(Jokey story telling following, although it is true I heard about Everest Base Camp first from you on the podcast which sparked my interest)
I was not completely lost though, for I knew another possible way to have a hang out with the H.I. Pod. In true hard as nails fashion I decided to go to Everest Base Camp during the July Monsoon season, for while Grey said about the trip “No, not in a thousand years am I stepping in that helicopter, going to that bridge, in that country” I knew you may have been up for the challenge.
I was first blocked by the 2015 earthquake, but after 8 days trekking this summer through sun and rain and snow I reached the marker with my Random Acts poster ready to be signed and the PVC pipe from that night’s science experiment as proof, but as I looked around there was not a Hello Internet host in sight (photo attached is from a bit lower on the return as is was wet and windy at the top).
Knowing you must have taken the true hard as nails option to instead wait for later this year and actually summit Everest in the dead of winter, I descended with the hope that you’ll know that thanks to you guys I was inspired to take a trip I never imagined possible.
A girl Tim,