Mersenne DigestMonday, January 31 2000Volume 01 : Number 685
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Date: Wed, 26 Jan 2000 22:49:57 +0100 (CET)
From: Henrik Olsen [EMAIL PROTECTED]
Subject: RE: Mersenne: small OS setup for mprime
On Wed, 26
Michael Pedersen wrote:
I am using the NT Service version of Prime95. I thought that when I shut
down windows the service would be stopped and results saved to disk, but
that's not the case. Only if I locate the service and press STOP, the results
are saved to disk.
I thought that a
... I don't receive any message from list for a few days ... so that's just a "test".
I owe you the equivalent bandwidth of this message.
Sylvain Perez
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Mersenne
Hi all,
I've been trying to figure out what the chance of finding a P-1 factor
is, given a certain amount of trial factoring and a P-1 bound.
I started with:
The chance of Mp having a factor in [2^n, 2^(n+1)] is 1/n.
The chance of a number N being B-smooth is
(log(B)/log(N))^(log(N)/log(B)) .
Hi,
At 02:21 PM 1/31/00 +, Alexander Kruppa wrote:
I started with:
The chance of a number N being B-smooth is
(log(B)/log(N))^(log(N)/log(B)) .
I don't think this is correct. Look up Dickman's function in Knuth vol 2
pages 382 and 383. You can also look at a July 10, 1996 post to this
Hi all,
I'm working on prime95 version 20. The important new feature
is a P-1 factoring step prior to a Lucas-Lehmer test. The P-1 factoring
step has a 3-5% chance of finding a factor at a cost of 2-4% of an LL test.
The net effect is we speed up GIMPS' throughput by a percent or two
At 11:38 AM 1/31/00 -0500, George Woltman wrote:
Would we be better off disabling P-1 factoring unless the user explicitly
activates it (knowing that most users won't read enough to turn it on)?
That sounds like a good idea to me. Giving up 24-48MB would interfere with
some people's work,
This is one vote for memory conumsion by default stays at 4ish MB, and only
if you change it on the advanced menu will it use more.
I know too many people who never read the docs and will have no idea why
their computer "got slow" when they put on ver. 20 and will just want it
taken off.
Louis
George
Here is another vote for P-1 to default to off unless it
is explicitly enabled using the Advanced Menu like ECM.
Regards
Alan Powell
[EMAIL PROTECTED]
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GIMPS has always had a good reputation for not interfering with
your normal work. To preserve GIMPS' reputation, I'm thinking of
implementing
the following. In the Options/CPU dialog, prime95 will let you select the
maximum
amount of memory the program can use and the hours of the day it
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