20040516, 23:27  #1 
"James Heinrich"
May 2004
exNorthern Ontario
2^{2}×29^{2} Posts 
P1 factoring != "Mersenne numbers to factor"?
How can I do P1 factoring only, the part that takes large quantities of RAM? I thought that choosing only "Mersenne numbers to factor" would do it, but that seems to be only factoring that doesn't require much RAM. I have plenty of RAM in one of my machines and would like to make use of it so that people with less RAM don't have to do the P1 factoring part, they can go straight to LL. Is this possible? I suppose I could just grab exponents and then manually unreserve them once the P1 part is done, but that seems silly...
Or am I trying to do something pointless? 
20040517, 00:21  #2 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2^{2}·3·17·47 Posts 
There are a few ways to try to do P1 only.
there have been attempts to do P1 in a semiauto mode. See this http://mersenneforum.org/showthread....1671#post11671 There is more discussion here. http://www.mersenneforum.org/showthread.php?t=2266 What you are talking about is not pointless. As a matter of fact, there are several folks that are trying to "cleanup" all exponents that have had 1 LL, but weren't P1'ed. This can help save DC'ing time. With lots of RAM, you could help. Look att this subforum http://mersenneforum.org/forumdisplay.php?f=30 
20040517, 00:43  #3 
"James Heinrich"
May 2004
exNorthern Ontario
2^{2}·29^{2} Posts 
Thanks Uncwilly.
It seems far less automated than I had hoped I look forward to the time when it's an integrated part of the client itself Last fiddled with by James Heinrich on 20040517 at 00:44 
20040517, 01:39  #4  
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
Quote:
(2) When Prime95 was originally written, it did not include any capability to perform P1 (or ECM) factoring. The only factoring method it offered was "trial factoring", and none of the messages bothered to include the qualifier "trial"  so all messages referred to simply "factoring" or "factor". Later, when P1 and ECM factoring were added, the existing messages were not changed, so an unqualified "factor" or "factoring" still meant only trial factoring, but the user is not explicitly informed of this by the documentation. Last fiddled with by cheesehead on 20040517 at 01:46 

20040517, 02:00  #5 
"Richard B. Woods"
Aug 2002
Wisconsin USA
1E0C_{16} Posts 
I tried to amend my preceding message to say that the situation is the fault of both the server and the client, but the editing deadline had expired.

20040517, 04:40  #6 
Oct 2003
Australia, Brisbane
2·5·47 Posts 
I would love to have you helping out in the MersenneAries work. I am obsessed with p1 testing and that is what I have both of my p4s on. The only disadvantage about doing this is that about once a week you manually have to submit results and update worktodo.ini but that only takes about a minute.
But the decision is up to you. You won't find a new prime this way but I find it more exciting than LL testing. 
20040517, 04:52  #7 
"James Heinrich"
May 2004
exNorthern Ontario
2^{2}×29^{2} Posts 
The chance of me finding a prime anyway is what, 1/200000, so I'm not worried much about losing that chance
I assume the abovementioned post is still the best method to engage in this testing? If not, or if you have any suggestions please let me know. 
20040517, 06:27  #8 
"Mark"
Feb 2003
Sydney
1000111101_{2} Posts 
I found the semiautomatic method described in the "abovementioned post" was not very useful  most exponents in the current primenet ranges have been P1'd, thanks in large part to the Mersennearies  see their subforum of the Data forum. They'd love to have you on board  there's plenty more P1 to do!

20040517, 11:09  #9  
Oct 2003
Australia, Brisbane
726_{8} Posts 
Quote:


Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
AouessareEl HaddouchiEssaaidi "test": "if Mp has no factor, it is prime!"  wildrabbitt  Miscellaneous Math  11  20150306 08:17 
"factoring" vs "factorizing"  ixfd64  Factoring  4  20121016 04:07 
Specifing TF factor depth in "Manual Assignments"?  kracker  PrimeNet  2  20120722 17:49 
"On factors of Mersenne numbers"  Seiji Tomita  cheesehead  Math  6  20091215 17:45 
trial factoring of "small" mersenne numbers  antiroach  Lone Mersenne Hunters  6  20030716 23:35 