# What’s special about 277777788888899? – Numberphile

From Numberphile. Matt Parker discusses multiplicative persistence. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) Extra footage: https://youtu.be/E4mrC39sEOQ Matt’s new book is Humble Pi: http://bit.ly/Humble_Pi More Matt videos on Numberphile: http://bit.ly/Matt_Videos The Multiplicative record holders: https://oeis.org/A003001 More info: http://mathworld.wolfram.com/MultiplicativePersistence.html Hear Matt on the Numberphile podcast… http://bit.ly/Numberphile_Pod_Playlist More links & stuff in full…

# The Plastic Ratio – Numberphile

From Numberphile. Ed Harris discusses the plastic ratio – more amazing than the golden ratio? You decide! More links & stuff in full description below ↓↓↓ See our golden ratio videos: http://bit.ly/Golden_Ratio Previous video with Ed (Heesch Numbers): https://youtu.be/6aFcgATW9Mw Ed Harris is online at http://maxwelldemon.com and on Twitter at https://twitter.com/gelada The Plastic Ratio Callipers were…

# 42 is the new 33 – Numberphile

From Numberphile. 42 is the only remaining (eligible) number below 100 which has not been represented as the sum of three cubes… 33 was cracked by Andrew Booker from the University of Bristol. More links & stuff in full description below ↓↓↓ The original 33 video: https://youtu.be/wymmCdLdPvM The 74 cracked video: https://youtu.be/_-M_3oV75Lw Casting out nines:…

# A Million Simulated Seasons – Numberphile

From Numberphile. How many points do you need to win and avoid relegation from the English Premier League? See Brady’s Blog for more info: http://www.bradyharanblog.com/blog/a-million-seasons Extra video with some math details: https://youtu.be/Zs2M7gWSbTg More links & stuff in full description below ↓↓↓ Featuring Tony Padilla and Adam Moss from the University of Nottingham. More details in…

# All the Numbers – Numberphile

From Numberphile. Matt Parker talks about numbers – as he often does. His book “Humble Pi” is at: http://bit.ly/Humble_Pi More links & stuff in full description below ↓↓↓ The book on Amazon: https://amzn.to/2NKposg Numberphile podcast is on your podcast player. Or the website is: https://www.numberphile.com/podcast And it’s on YouTube too: http://bit.ly/Numberphile_Pod_Playlist The Knight’s Tour T-Shirt…

# A Colorful Unsolved Problem – Numberphile

From Numberphile. James Grime on the Hadwiger–Nelson problem. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) Extra footage from this interview: https://youtu.be/7nBtRKvUox4 The Four Color Map Theorem: https://youtu.be/NgbK43jB4rQ More on James Grime (you can book him for talks): http://singingbanana.com More James Grime videos: http://bit.ly/grimevideos The de Grey paper: https://arxiv.org/abs/1804.02385 A good write…

# Heesch Numbers and Tiling – Numberphile

From Numberphile. Get your first audiobook free with an Audible 30-day trial. Go to http://www.audible.com/numberphile or text numberphile to 500 500. More links & stuff in full description below ↓↓↓ This video features Edmund Harriss from University of Arkansas. Extra footage from this interview: https://youtu.be/7ehaadVtaMI Heesch’s Tiling Problem by Casey Mann: http://faculty.washington.edu/cemann/Heesch.pdf Check out the…

# 1010011010 – Numberphile

From Numberphile. Featuring Simon Singh – catch him on the latest Numberphile Podcast too… https://youtu.be/kOttzKC33Vk More links & stuff in full description below ↓↓↓ Catch the Numberphile Podcast at: http://bit.ly/Numberphile_Pod_Playlist or at https://www.numberphile.com/podcast/ More videos with Simon on Numberphile: http://bit.ly/SimonSinghPlay Simon has written a book about math in The Simpsons and Futurama… And other books……

# Card Flipping Proof – Numberphile

From Numberphile. Zandra Vinegar demonstrates a card game and how she likes to visualise a proof associated with it (involving a hedgehog). More links & stuff in full description below ↓↓↓ More videos involving cards: http://bit.ly/Cards_Shuffling Buy a deck of Numberphile playing cards: http://bit.ly/NumberphileCards Zandra is director of mathematics at Brilliant. Numberphile is supported by…

# The Trapped Knight – Numberphile

From Numberphile. Featuring Neil Sloane… Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Trapped Knight T-Shirt: https://teespring.com/en-GB/numberphile-trapped-knight Neil Sloane is creator of the On-Line Encyclopedia of Integer Sequences: https://oeis.org For more on the sequences and diagrams in this video, you can start…

# The Graceful Tree Problem – Numberphile

From Numberphile. This video features Gordon Hamilton. More links & stuff in full description below ↓↓↓ Gord’s mathpickle website: http://mathpickle.com The Dollar Game: https://youtu.be/U33dsEcKgeQ More videos with Gordon: http://bit.ly/Gord_Playlist Discuss this video on Brady’s subreddit: https://redd.it/ai9t11 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a…

# Divisibility Tricks – Numberphile

From Numberphile. Featuring Tony Padilla… Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Extra footage and trick from this interview: https://youtu.be/ZWeUNUCf2rI Card trick and shuffling videos on Numberphile: http://bit.ly/Cards_Shuffling Belphegor’s Prime: https://youtu.be/zk_Q9y_LNzg Numberphile playing cards (limited and occasional supply): http://bit.ly/NumberphileCards I Love…

# Randomness is Random – Numberphile

From Numberphile. Featuring Simon Pampena… Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ More coin-related videos: http://bit.ly/coins_videos More videos with Simon Pampena: http://bit.ly/Pampena_Videos Simon on Twitter: https://twitter.com/mathemaniac Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported…

# Introducing the Numberphile Podcast

From Numberphile. Search for Numberphile on your podcast player. See the videos on Numberphile2: http://bit.ly/Numberphile2 More links & stuff in full description below ↓↓↓ More details about how to listen… http://www.bradyharanblog.com/blog/the-numberphile-podcast Podcast Playlist on YouTube: http://bit.ly/Numberphile_Pod_Playlist Hannah Fry episode: https://youtu.be/KKCjQWmUwv8 3brown1blue episode: https://youtu.be/A0RH93XvSyU Ken Ribet episode: https://youtu.be/NPOw4iIxN6o Brady’s other podcasts… Hello Internet: http://www.hellointernet.fm/ The Unmade…

# Terrific Toothpick Patterns – Numberphile

From Numberphile. Fun with toothpicks. Featuring Neil Sloane. More links & stuff in full description below ↓↓↓ Neil Sloane is the founder of the On-Line Encyclopedia of Integer Sequences: https://oeis.org Play with the toothpick simulator: http://oeis.org/A139250/a139250.anim.html The Toothpick Sequence and Other Sequences from Cellular Automata by David Applegate, Omar E. Pol, and N. J. A.…