Daran wrote:
>
> Whichever machine you choose for P-1, always give it absolutely as much
> memory as you can without thrashing. There is an upper limit to how much it
> will use, but this is probably in the gigabytes for exponents in even the
> current DC range.
So I should use the PIII with 1 3/4 GB of RAM to do nothing but P-1. It's an
older Xeon with 2MB cache. Will that help too?
How would I do this? I see the following in undoc.txt:
You can do P-1 factoring by adding lines to worktodo.ini:
Pfactor=exponent,how_far_factored,has_been_LL_tested_once
For example, Pfactor=10000157,64,0
> There are a number of ranges of exponent sizes where it is better to avoid
> using P4s. George posted the following table some time ago (Best viewed
> with a fixed width font.)
>
> FFT v21 v22.8 v21 SSE2 v22.8 SSE2
> 262144 5255000 5255000 5185000 5158000
> 327680 6520000 6545000 6465000 6421000
> 393216 7760000 7779000 7690000 7651000
> 458752 9040000 9071000 8970000 8908000
> 524288 10330000 10380000 10240000 10180000
> 655360 12830000 12890000 12720000 12650000
> 786432 15300000 15340000 15160000 15070000
> 917504 17850000 17890000 17660000 17550000
> 1048576 20400000 20460000 20180000 20050000
> 1310720 25350000 25390000 25090000 24930000
> 1572864 30150000 30190000 29920000 29690000
> 1835008 35100000 35200000 34860000 34560000
> 2097152 40250000 40300000 39780000 39500000
> 2621440 50000000 50020000 49350000 49100000
> 3145728 59400000 59510000 58920000 58520000
> 3670016 69100000 69360000 68650000 68130000
> 4194304 79300000 79300000 78360000 77910000
>
> If you are testing an exponent which is greater than an entry in the fifth
> column, but less than the corresponding entry int the third column, then
> avoid using a P4. This applies to all types of work.
Useful info. I've got 2 DCs in one of the ranges but one computer's a PIII
and the other's a Dec Alpha running Mlucas-2.7b-gen-5x.
--
[EMAIL PROTECTED] - HMC UNIX Systems Manager
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