For Pi Day 2018 I calculated π by hand using the Chudnovsky algorithm. https://en.wikipedia.org/wiki/Chudnovsky_algorithm k = 0 42698672/13591409 = 3.141592|751... k = 0 and k = 1 42698670.666333435968/13591408.9999997446 = 3.14159265358979|619... Watch me do the second term working out on my second channel: https://www.youtube.com/watch?v=I7YvD7dqsy8 See me do the entire final calculation again (without a mistake) on Patreon: https://www.patreon.com/posts/17542566 Proof that I did actually do it properly: https://www.dropbox.com/s/64vc5iz7yt41r53/chudnovsky-pi-FIXED.pdf?dl=0 This was my attempt two years ago. Look at how much hair I had! https://www.youtube.com/watch?v=HrRMnzANHHs The Chudnovsky Brothers used their algorithm to be the champion pi calculators of the early 1990s: going from half a billion to four billion digits of pi. https://en.wikipedia.org/wiki/Chronology_of_computation_of_%CF%80 This video was filmed at Queen Mary University of London. CORRECTIONS - None yet. Let me know if you spot anything! Thanks to my Patreon supporters who enable me to spend a day doing a lot of maths by hand. Here is a random subset: Christopher Samples Sean Dempsey-Gregory Emily Dingwell Kenny Hutchings Rick de Bruijne Support my channel and I can make more videos: https://www.patreon.com/standupmaths Music by Howard Carter Filming and editing by Trunkman Productions Audio mastering by Peter Doggart Design by Simon Wright MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ Maths book: http://makeanddo4D.com/ Nerdy maths toys: http://mathsgear.co.uk/