Help, our train home is making 9 quintillion stops.

Thanks as always to Jane Street! Here is that blog post about 63-bit numbers.
blog.janestree...
My book is out in North America on the 21 January 2020. Pre-order now!
bit.ly/humblepi
Here are the numbers:
9,223,372,036,854,775,798 stops
2^63 = 9,223,372,036,854,775,808
7FFFFFFFFFFFFFF6
111111111111111111111111111111111111111111111111111111111110110
Here are the tweets:
Neil Codling @neilcodling
👀 Help, our train home is making 9 quintillion stops.
EIZrPtbW4AA3UL2.jpeg
/ 1190757074164170758
Daniel @drawRect
Replying to @neilcodling
Thanks for the tweet. What version of the app are you using? I thought we fixed this bug AGES ago.
/ 1191033767760158720
Lia Buddle @LiaBuddle
Replying to @neilcodling
Had the same thing in 2017...
EIc4CNJXsAATexO.jpeg
/ 1190982241914101760
Matt Parker @standupmaths
Thanks everyone who sent me this amazing tweet! So, as always it’s probably a binary overflow problem and sure enough 2^63 = 9,223,372,036,854,775,808 which is close!
/ 1190940255974760448
We have a free Think Maths magic trick activity that teachers can use to introduce their students to binary.
think-maths.co....
CORRECTIONS
None yet, let me know if you spot any mistakes!
Thanks again, as always, for Jane Street being my principal sponsor.
www.janestreet...
Thanks to my Patreon supporters who help make these videos possible. Here is a random subset:
Icaro Fonseca
Timothy Lombard
Andy B
Nokui
Peter
Tracy Parry
Brandon
Lindsay Miller
Support my channel and I can make more maths videos:
/ standupmaths
Filming and editing by Alex Genn-Bash
Music by Howard Carter
Design by Simon Wright
MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
Maths book: wwwh.umble-pi.com
Nerdy maths toys: mathsgear.co.uk/