Karim BELABAS on Fri, 6 Dec 2002 18:19:16 +0100 (MET)


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Re: primetables SEGV 

On Thu, 5 Dec 2002, Igor Schein wrote:
> % gp -q -f -p 2156858852
> Segmentation fault
>
> 1 extra check is needed.
>
> That's with 32bit binary.

There's this one suspicious couple of lines in initprimes0()

  /* Checked to be enough up to 40e6, attained at 155893 */
  size = (long) (1.09 * maxnum/log((double)maxnum)) + 145;

For a fact, 'size' is too small in your example, and
maxnum = 2156858852 > 40e6

Gerhard what was the basis for your bound ?

Cheers,

    Karim.
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Karim Belabas                    Tel: (+33) (0)1 69 15 57 48
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