Uploaded December 2021 | Updated September 2026, 2 weeks ago

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Featuring Neil Sloane. More links & stuff in full description below ↓↓↓

Neil Sloane is the founder of The OEIS: oeis.org

More videos with Neil: bit.ly/Sloane_Numberphile

Prime Playlist: bit.ly/PrimePlaylist

Note the 17350-digit prime we feature is more accurately classed as a "probable prime" at this time.

Visit gift.climeworks.com/numberphile to give the gift of CO₂ removal. Use code NUMBERPHILE10 for 10% off your purchase in December (sponsor)

Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumberphile

We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. 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 - akamai.com/company/corporate-responsibility/akamai-foundation

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