On 6 Apr 00, at 20:48, Nathan Russell wrote:
These exponents originate from a user that has been doing factoring to
small depths on several hundred, if not thousand, exponents. Check the
list archives from about 2 weeks ago.
Actually PrimeNet should take care of that problem itself. There
On 7 Apr 00, at 7:15, Martijn Kruithof wrote:
A small suggestion for the V20 is also to output the P-1 factoring
progress information once in a while to the results file. I have
currently 3 cpu's doing P-1 factoring, and I do not see anything
at all in the results file.
Writes to the
A nasty thought just struck me.
It's well known that factors of M(p) are of the form 2kp+1.
It's also well known that factors found by the P-1 algorithm are of the form
(product of powers of small primes) + 1 where "small" means less than an
arbitrarily chosen limit B1. I omit stage 2 from
Paul Leyland writes:
A nasty thought just struck me.
It struck me in a different context some time ago; it might even be
archived.
When applying P-1 to mersenne numbers, an additional 2*p ought to
be included in the product, over and above all the powers of prime
B1. Can anyone
Hi Martijn,
At 07:15 AM 4/7/00 +0200, Martijn Kruithof wrote:
A small suggestion for the V20 is also to output the P-1 factoring
progress information once in a while to the results file.
OK. The next version will work the same way LL testing and factoring
does. It will use the "Iterations
Hi Paul,
At 09:40 AM 4/7/00 -0700, Paul Leyland wrote:
When applying P-1 to mersenne numbers, an additional 2*p ought to be
included in the product, over and above all the powers of prime B1. Can
anyone who knows for certain reassure me that this has been done for the
prime95 V20
Paul Leyland wrote:
It's well known that factors of M(p) are of the form 2kp+1.
When applying P-1 to mersenne numbers, an additional 2*p ought to be
included in the product, over and above all the powers of prime B1. Can
anyone who knows for certain reassure me that this has been done
I worked that excel sheet up using the information available at
http://www.mersenne.org/bench.htm; the .xls file is available
at http://web.mit.edu/zudark/www/MersenneSpeeds.xls
I haven't updated it with the newest numbers from mersenne.org,
but hopefully it's still useful to you.
-Ethan
Ugh. I think I mentioned I had a new PowerEdge 4400 server in my labs with
dual 600MHz P3-XEON coppermines running on a ServerWorks chipset that has
dual PC133 SDRAM busses? Well, I fired up mprime on it today, and running
two concurrent instances, have gotten several ERROR: SUMOUT things, each
Fascinating (for me). How much memory do you have, and what is each
XEON cache size? And (pleading ignorance) what OS are you running?
Best Regards,
Stefanovic
John R Pierce wrote:
Ugh. I think I mentioned I had a new PowerEdge 4400 server in my labs with
dual 600MHz P3-XEON coppermines
How long will each ECM curve on M727 take? I'd like to run a few in May,
when I'm done with my current work, but don't know how many to set up. To
put it another way, how many curves will take about a week on a p3-600
running 16/7?
I checked the various FAQs, but couldn't find this
Stefanovic asks...
Fascinating (for me). How much memory do you have, and what is each
XEON cache size? And (pleading ignorance) what OS are you running?
1.2GB (!), 256k cache per ( :( the 0.18u coppermine xeons are only available
this way), and RedHat Linux 6.1, special Dell SBE version.
If I had added the 1 Gig, and it wouldn't play I'd pull it.
Sounds so gorgeous otherwise, it's just got to fly...arghhh.
John R Pierce wrote:
Stefanovic asks...
Fascinating (for me). How much memory do you have, and what is each
XEON cache size? And (pleading ignorance) what OS are you
yeah, ugh. Well, the system came with 256MB of PC133 ECC registered SDRAM
(2 * 128MB), I've fortified it with an additional 1GB of PC133 ECC
registered SDRAM (4 * 256MB). I would *hope* any memory error would trip a
ECC error. Tomorrow, I might pull the 1GB out and leave just the original
Mersenne Digest Friday, April 7 2000 Volume 01 : Number 715
--
Date: Wed, 5 Apr 2000 17:32:39 EDT
From: [EMAIL PROTECTED]
Subject: Mersenne: Re: Mersenne Digest V1 #714
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