Fwd: pi(1801241230056600523)

[Hans Havermann]

I wrote (to SeqFan):

> I just discovered that the fourth term of A016088 was added a few  
> months ago: 1801241230056600523, with a note that pi 
> (1801241230056600523) remains to be determined in order to extend  
> A046024. This doesn't help, but from web-published tables its  
> approximation would be 4.3923 * 10^16.

Begin forwarded message:

> From: Tomás Oliveira e Silva <tos at det.ua.pt>
> Date: December 14, 2005 9:44:38 AM EST (CA)
> To: Hans Havermann <pxp at rogers.com>
> Subject: Re: pi(1801241230056600523)
>
> Hello,
>
> The value of pi(1801241230056600523) is 43922730588128390. This took
> about 40 minutes to compute (and another 40 to double check, with
> other program parameters) on a 3.2GHz Pentium 4 Xeon.
>
> If needed, I can compute in a few hours the value of pi(x) for x  
> smaller
> than 2^64, and, in less than a day, for x smaller than 10^20. Larger
> values of x take longer. I am currently in the middle of the  
> computation
> of pi(2*10^22) and pi(4*10^22). The last is the current world record.
> In the near future I will write a program capable of computing pi 
> (10^28)
> [this, of course, will take make CPU years...].
>
> Best regards,
> -- 
> ---------------------------------------------------------------------- 
> ----
>    Tomás Oliveira e Silva    tos at det.ua.pt    http://www.ieeta.pt/~tos
> ---------------------------------------------------------------------- 
> ----
> "God's Final Message to His Creation: We apologise for the  
> inconvenience."
>                       So Long, and Thanks for all the Fish, Douglas  
> Adams
>

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