Thanks to Jane Street for their support... Check out internships here: https://www.janestreet.com/join-jane-street/internships/ More links & stuff in full description below ↓↓↓ This video features Dr James Grime on divisibility. James Grime: https://www.singingbanana.com/ His YouTube channel: null More James on Numberphile: http://bit.ly/grimevideos More divisibility on Numberphile: https://www.youtube.com/watch?v=yi-s-TTpLxY JANE STREET... Applications for Summer 2023 internships are open and filling up... Roles include: Quantitative Trading, Software Engineering, Quantitative Research and Business Development... and more. Positions in New York, Hong Kong, and London. https://www.janestreet.com/join-jane-street/internships/ Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from The Akamai Foundation - dedicated to encouraging the next generation of technology innovators and equitable access to STEM education - https://www.akamai.com/company/corporate-responsibility/akamai-foundation NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts and Merch: null