"Brian J. Beesley" wrote:
> On 20 Sep 99, at 1:06, Rick Pali wrote:
>
> > The only question that comes to mind is if you had to plough through
> > factoring before you got to the LL test...but then I realise that you still
> > wouldn't be done if that were true.
>
> You don't have to pre-factor, if you choose "Test" or "Time" from the
> "Advanced" menu.
> >
> > I signed up for an exponent in the 33mil range and the factoring alone took
> > 13 days on a P3-500.
>
> Ah, so we're maybe not doing enough trial factoring. I guess your
> completion time is about a year; trial factoring should take between
> 5% and 10% of the time for a LL test, & 13 days is only about 3.5%. I
> think we should probably go one bit deeper, this would double the
> trial factoring time - but would save the whole year, if you managed
> to find a factor.
>
> > I'd originally does it for testing purposes, but after
> > that I've just got to let it continue. :-)
>
> Well, why not?
> >
> > In a year's time, I'd love to see some numbers on how many signed up for tem
> > million digit numbers and later quit for smaller exponents...
>
> I think you need to be a true enthusiast to take on a single test
> taking ~ 1 year. Lots (attracted by ca$h) won't realise what it
> means, for a week or two, & may then drop out 8-( To avoid this
> happening to too many people, I think we should be a bit more upfront
> that testing a 10 million digit number is going to take about a year,
> even on a state-of-the-art system.
>
> I have several fastish systems - a couple of them are running QA
> stuff at the moment - I may voluntarily take on a 10 million digit
> number on _one_ of them, but I certainly wouldn't choose to run tests
> of that length on _all_ of them!
>
> Regards
> Brian Beesley
> _________________________________________________________________
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Notice that in v19 if you set it to get 10 Million range numbers you get a warning
about it taking a year on a 500 Mhz P-2, and odds of 1 in 250,000.
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