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## #1 2013-02-07 15:57:07

Leroy
Guest

### Nth digit of pi

I've heard that there is a function that gives nth digit of pi,is it true?if it is i'd like to know more about it.

## #2 2013-02-07 19:54:51

bobbym

Online

### Re: Nth digit of pi

Hi;

Yes, it is called a spigot algorithm. It can zero in on the nth digit without having to get all the preceding ones

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2013-02-07 23:45:39

Leroy
Guest

### Re: Nth digit of pi

Could you please tell me more about it

## #4 2013-02-07 23:52:26

bobbym

Online

### Re: Nth digit of pi

Hi;

Here is an example of a spigot algorithm being used to get the 50 th digit from ln(2). Process is the same for pi.

http://www.mathisfunforum.com/viewtopic … 19#p229919

To see how pi is done check out the BBP formula right here.

http://en.wikipedia.org/wiki/Bailey-Bor … fe_formula

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Leroy
Guest

Thanks

## #6 2013-02-08 02:13:04

bobbym

Online

### Re: Nth digit of pi

Hi;

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #7 2013-02-08 03:11:28

anonimnystefy
Real Member

Offline

### Re: Nth digit of pi

Hi bobbym

Is there a way of getting the nth decimal digit of pi by a spigot algorithm?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #8 2013-02-08 10:52:51

bobbym

Online

### Re: Nth digit of pi

Hi;

None that I know of, the BBP is for hexadecimal digits.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.