The Most Evil Number (Belphegor's Prime) - Numberphile

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

NUMBERPHILE

Videos by Brady Haran

[SinclairLocke]

Now I understand why Brady says that mathematicians love finding ways to be useless.

[christianp]

for me the most evil number is my account balance :/

[ajw]

"The famous prime number hunter" I love these guys.

[tharungurunath]

"Makes you wonder who hell's ambassador to England is..'

"....nigel farrage, isn't

[drumetul_dacic]

Another fun number is the following base-36 prime:

I was able to find only two more primes of this kind:



Are there more?

In the same spirit, a nice base-32 Numberphile prime:

[Pomodorosan]

0:38 one simple "1" and one fancy "1" is the real reason this number is evil

[francoistrempe]

Thank you Brady, this video made me happy for some unknown reason.

[thedangeroussaint]

I show this to my New Testament class every year when we study Revelation, and it is one of their favorite videos. Thank you for all your amazing content!

[maxbramwell.]

I love the difference in his tone when he says "right" to denote position and when he just says "right" as a scouce verbal tick.

[mischiefmanaged]

Professor Padilla, your enthusiasm made this extra awesome. Fun bit of research!

[abhavishwakarma]

Number of 1's = 2
Number of 000's(on one side) = 13
Number of 6's = 3

The number of digits of the same number are all prime! So spooky Brady!

[itzzzsss]

I had no idea something like this existed.

Only evil numbers are numbers that you shout out loud, miss out on lunch and dinner, takes hours to complete saying

[alphaprimus]

Belphegor is the ambassador to France. That's it, that is all you need to know why this number is evil.

[nicholaslau]

How about a parker prime? Basically any number proven not to be a prime number

[WatchThis]

Thanks for the Halloween costume idea! I'm going to dress up as the Belphegor's Prime! Numberphile always has the best costume ideas!

[TheMexicanPlatypus]

Love all your videos numberphile!! You bring a contagious enthusiasm to learning about numbers that I didn’t know was possible :)

[austynhughes]

I love when Dr.Padilla shows up in a Numberphile video!

[kevwang]

What I find even more amazing is that there are OEIS entries for each of these sequences.

[derfunkhaus]

I wonder if a naughty prime has a safe word to use when its being spanked by a dominatrix.

[praveenb]

But bel-figure means beautiful number!