bigfloat

[Denis Koroskin]

On Wed, 08 Apr 2009 21:54:02 +0400, Frank Torte <frankt123978 at gmail.com> wrote:

> Paul D. Anderson Wrote:
>
>> Is there an active project to develop arbitrary-precision floating  
>> point numbers for D?
>>
>> I've got a little extra time at the moment and would like to contribute  
>> if I can. I've done some work in floating point arithmetic and would be  
>> willing to start/complete/add to/test/design/etc. such a project. What  
>> I hope NOT to do is to re-implement someone else's perfectly adequate  
>> code.
>>
>> If no such project exists I'd like to start one. If there are a bunch  
>> of half-finished attempts (I have one of those), let's pool our efforts.
>>
>> I know several contributors here have a strong interest and/or  
>> background in numerics. I'd like to hear inputs regarding:
>>
>> a) the merits (or lack) of having an arbitrary-precision floating point  
>> type
>>
>> b) the features and functions that should be included.
>>
>> Just to be clear -- I'm talking about a library addition here, not a  
>> change in the language.
>>
>> Paul
>>
>>
>
> When you can use a number in D that is more than the number of atoms in  
> the known universe why would you want a bigger number?

I'd like to calculate pi with up to 20000 valid digits. Or a square root of 2 with the same precision. How do I do that?