Try RealField(500).pi() and similar.
On 21 Feb 2016 18:10, "Thierry Dumont" <[email protected]> wrote:
> I have students who want to compute decimals of pi...so, what can we do
> with RealField(n) ?
> I make the following script (pi.sage):
>
> ------------------------
> for p in [2..10]:
> R=RealField(10^p)
> pii=4*atan(R(1))
> print p,R,pii
> ------------------------
>
> Then, using sage 7.0 or 7.1.beta4:
>
> attach("pi.sage")
>
> This produces a lot of seemingly correct output, but, as it takes a too
> long time to finish :-), I interrupt the computation (Ctrl-c).
>
> So, lets try again; replace 10 by 5 in the for statement (I do not leave
> sage). I get NaNs:
>
>
> 2 Real Field with 100 bits of precision NaN
> 3 Real Field with 1000 bits of precision NaN
> 4 Real Field with 10000 bits of precision NaN
> 5 Real Field with 100000 bits of precision NaN
> .....
>
> Strange.
>
> Yours
> t.d.
>
>
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