20090123, 06:09  #1 
"William"
May 2003
New Haven
23·103 Posts 
Verser's Sixth
Rocke Verser continues to work the "soft side" of ElevenSmooth and has found another factor, this time a P37 from M(100800). This is the second known factor of this primitive, both found by ElevenSmooth. The composite cofactor has been reduced from C6925 to C6889. I've been slow to update the site; Rocke found this factor on Nov 15.
The "soft side" of ElevenSmooth has the factors of 2^{1663200}+1. Most of these primitives are not yet in the ECM Server. They received effort as part of the "Special Project" that used Prime95 on the entire 2^{3326400}1. Rocke is the lastest of several searchers that have looked at this side in personal searches. Thanks, Rocke. 
20090128, 22:01  #2 
Dec 2004
453_{8} Posts 
William,
I remember you use to have a page that listed each of the composites where one could download the numbmer and perform ... then report. Is that page still availabe? I'm at the old email address tlc4tvm. 
20090129, 00:58  #3 
"William"
May 2003
New Haven
23×103 Posts 
The composites that are in the ecm server are also in this text file:
http://elevensmooth.com/composites.txt I don't have a list for the "soft side" composites that are not in the ecm server. These were previously worked indirectly by using prime95 on the entire 2^{3326400}1. As the B1 level rose, these curves were taking more time than people were willing to spend. We considered reducing the work time by working on some of the big factors. It's effectiveness was limited by the overlap of smaller primitives, and the coordination effort increased as lowM information was needed for each of the big factors. Between these drawbacks and the further work on many of the individual numbers, I don't think additional "prime95 in total" work is worth the trouble. I've been thinking about organizing the rest of the composites and adding them to the ecm server. 
20090129, 13:54  #4 
Dec 2004
13·23 Posts 
William,
Just by looking at the last 6 numbers 4 of them can be factored by ... 2 LOL seriously I think the file was cropped or something. I know people have offline machine such as myself. If a list were readily availabe for say ecm50+ work etc you might find a few more takers. 
20090129, 16:23  #5  
"William"
May 2003
New Haven
23×103 Posts 
Quote:
FYI the final digits are 2_30240P.C4157 21601 2_36960P.C4605 90241 2_33264P.C5159 29121 2_41580P.C5202 38401 2_47520P.C6909 67841 2_55440P.C6936 15201 You can tell where more effort is useful on the Progress page If all goes well, the numbers larger than 3000 digits will become laggards because yoyo@home will work on the numbers below 3000 digits. These numbers all need more work at the 35 digit level (B1=1M). If tasks of this size are suitable, these would be my recommendations for offnet work. But any work on any number is appreciated. 

20090130, 04:29  #6 
Dec 2004
12B_{16} Posts 
William,
Your absolutely correct, I had to save the link to desktop, my browser was truncating. Thanks It's been a while does prime95 have a method for using P1 or ECM on number inputs like ecm6 did? n=####...### 
20090130, 04:58  #7 
"William"
May 2003
New Haven
2369_{10} Posts 
Ohhh  you want to use prime95? Are you planning on running the whole elevensmooth exponent (3326400), or that divided by some small number? Five years ago we did a lot of prime95 ecm on the full exponent with B1 up to 50K. At the next level the curves took longer than people's patience.
If this is what you want to do, I know you will need the lowm file to filter out previously discovered factors. I'll need to refresh it a bit  perhaps a lot depending on the exponent you want to run. Prime95 has changed some since then, so we will also need somebody to help us get the setting right. You won't need the information in the composites.txt file. I thought you were going to run ecm on one of the composite numbers. Let me know what you want to do and I'll get the stuff together for you. William 
20090130, 17:26  #8  
A Sunny Moo
Aug 2007
USA (GMT5)
1869_{16} Posts 
Quote:


20090131, 03:21  #9 
"William"
May 2003
New Haven
23×103 Posts 
I hope the lowm.txt is still supported. M(3326400) has a lot of algebraic factors, so lots of factors are already known.

20090131, 14:59  #10 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
2^{6}·3·31 Posts 

20090131, 16:02  #11 
Nov 2008
2322_{10} Posts 

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