# Numberphile

Mathematics

#### The Most Wanted Prime Number

Neil Sloane explains the world’s most wanted Prime Number.

Mathematics

#### The Reciprocals of Prime Numbers

Matt Parker explores the work of William Shanks and the inverse of primes.

Mathematics Philosophy Fridays

#### What is a Number?

For Philosophy Friday let’s ask the question: what is a number? ,

Mathematics

#### How to Make Railway Timetables with Graphs

Hannah Fry discusses the mathematics behind Train Graphs. ,

Mathematics

#### The Lightning Algorithm

Here’s a bit of math to get your Monday started. This time Matt Henderson is making lightning in mazes.

Science

#### How Do Brains Count?

Professor Brian Butterworth is a neuroscientist who specialises in numbers and mathematics. More from this interview at https://youtu.be/FCS4b3OjVJM

Mathematics

#### Trigonometry is Beautiful

Many people are surprised to learn that for most of my school years, I despised math. Seriously, I hated it. People are usually taken aback, given that I work in AI and Data Science. However, there was always one branch of math that always fascinated me. Numberphile explores the wondrous world of trigonometry.

Mathematics

#### A Breakthrough in Graph Theory

Numberphile explains a recent breakthrough in graph theory A counterexample to Hedetniemi’s conjecture – featuring Erica Klarreich. Read Erica Klarreich’s Quanta article on this subject: https://www.quantamagazine.org/mathematician-disproves-hedetniemis-graph-theory-conjecture-20190617/ And visit her website: http://www.ericaklarreich.com/ Yaroslav Shitov’s breakthrough paper: https://arxiv.org/abs/1905.02167

Mathematics

#### A Fascinating Thing about Fractions

The Dynamical Uniform Boundedness Conjecture with Dr Holly Krieger,  the Corfield Lecturer at the University of Cambridge as well as a Fellow at Murray Edwards College.