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Bitcoin to SOAR in April (10000000000000 66600000000000001)

Belphegor's prime is the palindromic prime number 1000000000000066600000000000001, a number which reads the same both backwards and forwards and is only divisible by itself and one.

In demonology, Belphegor (or Beelphegor, Hebrew: בַּעַל-פְּעוֹר‎ baʿal-pəʿōr - Lord of the Gap) is a demon, and one of the seven princes of Hell, who helps people make discoveries. He seduces people by suggesting to them ingenious inventions that will make them rich. According to some 16th-century demonologists, his power is stronger in April. Bishop and witch-hunter Peter Binsfeld believed that Belphegor tempts by means of laziness.[1] Also, according to Peter Binsfeld's Binsfeld's Classification of Demons, Belphegor is the chief demon of the deadly sin known as Sloth in Christian tradition.

http://en.wikipedia.org/wiki/Belphegor%27s_prime



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I had "the flu" this year. I

I had "the flu" this year. I thought I was going to die, no lie. I was in bed for 2 days and I don't recollect much of anything those days. Sickest I'd ever been. This was after they took Theraflu off the shelves. Damn you Theraflu!

jrd3820's picture

Who made that?

?

Michael Nystrom's picture

Wouldn't you like to know

:)

The only way to make sense out of change is to plunge into it, move with it, and join the dance. - Alan Watts
jrd3820's picture

So if you are making games and whatnot

Is there a way to play scrabble at the DP?

jrd3820's picture

Did you make it?

Do you make games also?

Michael Nystrom's picture

Not me, kiddo

My magical powers are reserved for a different realm.

The guy who makes the buttons. Or, more accurately, the guy who makes the buttons do stuff. (Anyone can make buttons).

Go sign up. Try it out. I don't know anything about "Words With Friends," but this is like Scrabble, only better.

The only way to make sense out of change is to plunge into it, move with it, and join the dance. - Alan Watts
Cyril's picture

All Mersenne primes are trivially palindromic, too

All Mersenne primes are trivially palindromic, too, btw... Well, in base 2, that is:

3 = 11(2)

7 = 111(2)

31 = 11111(2)

127 = 1111111(2)

...

2^p - 1 = 111...11(2) with p 1's, and p prime

;)

"Cyril" pronounced "see real". I code stuff.

http://Laissez-Faire.Me/Liberty

"To study and not think is a waste. To think and not study is dangerous." -- Confucius

Joη's picture

/^1?$|^(11+?)\1+$/

unary prime regex

base 10 prime palindromes < 20,000:

3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181, 18481, 19391, 19891, 19991

"You underestimate the character of man." | "So be off now, and set about it." | Up for a game?

Cyril's picture

Nifty :)

Nifty :)

"Cyril" pronounced "see real". I code stuff.

http://Laissez-Faire.Me/Liberty

"To study and not think is a waste. To think and not study is dangerous." -- Confucius

Cyril's picture

There are many of these guys

There are many of these guys, here are the first trivial few... 101, 131, 151, 181, 191, 313, ...

or also: 122333221, etc

:)

"Cyril" pronounced "see real". I code stuff.

http://Laissez-Faire.Me/Liberty

"To study and not think is a waste. To think and not study is dangerous." -- Confucius

conjecture: There are infinitely many of these guys

although I'm not sure that has been proved.

Leges sine moribus vanae

Cyril's picture

Still an open topic of research, if only for Mersenne primes

Still an open topic of research, if only for the Mersenne primes, if you're interested :

1) there's a mapping between Mersenne primes and perfect numbers :

http://en.wikipedia.org/wiki/Perfect_number

and

2) it is still not known if there are infinitely many perfect numbers, precisely...

"Cyril" pronounced "see real". I code stuff.

http://Laissez-Faire.Me/Liberty

"To study and not think is a waste. To think and not study is dangerous." -- Confucius