Liar Numbers - Numberphile

Fermat's "Little" Theorem is great - but beware of Fermat Liars and tricky Carmichael Numbers.
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NUMBERPHILE

Videos by Brady Haran

[anisometropie]

“…is called a fermat liar. Ooooh, it's not really prime, it's lying. It tells me it's prime and it's not. Naughty!”
James talks are my favorites :)

[shotguntornado]

I love how cheeky James got about the $620. "Think of what you could do with all that money!"
He's my favorite face on this channel.

[asdasdasdasd]

We need to pay more salary to mathematicians. He almost lost his mind over 620$ :D

[colinmusik]

Quickly becoming my favorite youtube channel. 

[jacktumbleweed]

I've spent the majority of my weekend watching Numberphile videos. Call me insane, you guys make numbers way more interesting than school ever did. I feel excited to learn again.

[captainpalegg]

It’s 2:43 am, I have class in the morning, I'm a freaking *geography* major…and here I am bingeing Numberphile.

[armoredp]

620 dollars, I'm regretting not becoming a mathematician already. It seems to be a life of pure decadence and unequaled wealth.

[Borednesss]

$630 wouldn't even cover the cost of electricity to compute a counter example I bet haha

[SnackMuay]

James is great. I love all the people you have on this channel, Brady, keep up the good work.

[sbrunner]

How wonderful of a person is Dr Grime! What a fantastic likable human. I wish I could always be around people like him.

[acorn]

Maybe this test is actually for Carmaecal composites, and every prime number is a liar.

[nerdbot]

$30 at the beginning and now $620? Why they´ve picked such random values? Why not $561? Or $1105? Or $1729?

[patjohbra]

One day I hope to find someone that makes as happy as primes make Dr. Grimes

[merlinmagnus]

How do you get a mathematician to solve a difficult problem? Offer a years supply of Klondike bars! That will get it solved fast.

[surrog]

Thank you brady for adding subtitles to your videos, I have shown your channel to  several hearing-impaired friends and they absolutely love it =)

[metleon]

First bagels now ice cream. This channel's making me hungry.

[Friedeggonheadchan]

I want Mr. Grimes to call me naughty, over and over again.

[nowneothanielverse]

Sometimes i wonder after watching a numberphile video
i ask my self. Am i a prime?

Running time: 7:09
709 is a prime

I see what you did there. 

[miakablan]

 i am in love with this guy <3 and his accent too <3