Hi,
At 04:44 PM 6/27/00 +0200, Reto Keiser wrote:
>Where can I find the p-1 tool factor98.exe? As far as I know it supports
>p-1 factoring furteher than prime95 (prime95 only allows a b1 up to
>700M). is this tool still available?
prime95 should be faster and it supports b1 up to 4 billion.
>How much memory does an ecm test stage 2 need?
The readme.txt file indicates you need a minimum of FFT size times
192 bytes. That is, to ECM the 20th Fermat number an FFT size of
64K is used and a minimum of 12MB is needed.
> As much as an p-1
>stage 2 of the same exponent?
P-1 stage 2 can operate on much less memory - as low as 32 * FFT size
or in the case of the 20th Fermat number, 2MB.
>What about an LLtest of an 10Mdigitnumer?
Here you are using a 1792K FFT size. Times 8 bytes per double equals
14MB. Add a little bit of overhead for code and sine/cosine tables and you
get around 16MB.
Regards,
George
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