New Largest Known Prime Number

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

There is a new "largest known prime number".

Extra footage: http://youtu.be/o0ZOs7sMS7k

More on Mersenne Primes: http://www.youtube.com/watch?v=PLL0mo5rHhk
Perfect Numbers: http://www.youtube.com/watch?v=ZfKTD5lvToE
Googolplex: http://www.youtube.com/watch?v=8GEebx72-qs
Graham's Number: http://www.youtube.com/watch?v=XTeJ64KD5cg

This video features Dr Tony Padilla from the University of Nottingham.