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Old 2003-08-23, 04:52   #23
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Default P13 factor of M(30240)

This P13 factor of M(30240) was found with Dario Alejandro Alpern's Java factoring program at http://www.alpertron.com.ar/ECM.HTM. The residual C2063 is in the ecm server at wblipp.dynu.com

M( 30240 )C: 1300861356481
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Old 2003-08-26, 21:55   #24
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Default P25 factor of M(19008) found with ecm

P25 factor of M(19008) found with ecm at B1=11000, distributed from the ecm server at wblipp.dynu.com

M( 19008 )C: 2311666976312533282088449

The remaining composite, C1700 is now being distributed by the ecm server along with the other composites from M(3326400)
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Old 2003-08-27, 01:58   #25
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Default P17 for M(12096) found with Java

This P17 for M(12096) was found with Dario Alejandro Alpern's Java factoring program on the web at http://www.alpertron.com.ar/ECM.HTM . It is the first known factor for the primitive part of M(12096). The remaining C1024 is in the ecm server at wblipp.dynu.com along with other composite factors of M(3326400).

M( 12096 )C: 31835833133182849
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Old 2003-09-03, 02:47   #26
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The following P15 factor of M(8640) was found with Dario Alpern's Java factoring program on curve 12. It is the first known factor of the primitive part of M(8640).

M( 8640 )C: 210925997723521

The remaining C680 is in the ecm server at wblipp.dynu.com

I've noticed several new names connecting to the server recently. Thanks and welcome!
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Old 2003-09-04, 13:19   #27
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Default P33 of M(1575) leave C149

The ecm server at wblipp.dynu.com now has a C149, the smallest composite in a long time. Last night I added the C182 from M(1575) to the server. Overnight the following P33 was found, leaving the C149.

This number is still pretty low in ecm work - it is about to transition from B1=25e4 to B1=1e6. Presently this number is receiving 100% of the assignments from the server - 20% because it is the smallest composite and 80% because it is the smallest according to the work*length^2 metric. Sometime today it will catch up to the other numbers in the second metric, and continue at the 20% level.

Between the low amount of ecm work and the smallness of the composite, we might complete the factorization of this number soon. If you want to participate, pick up the package from smh (see earlier posts) and run the ecmclient.

M( 1575 )C: 764384916291005220555242939647951
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Old 2003-09-08, 03:45   #28
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Default P29 factor of M(12096)

The ecm servers at mandlebrot.dynu.com and wblipp.dynu.com are networked together and can be used as alternates for each other. Both servers are handing out factors of M(3326400) and they keep each other updated using the buiiltin functions of the ecmserver program. If either server goes down while you are participating, you can edit the ecmclient.cfg file and continue working using the other one = both servers learn about all work reported to either server. Andi314 also has some nice statistics pages at www.ecmserver.de.vu . A special thank you to Andreas for his support of the project.

We've recently passed some milestones in the project. The ecm servers now have all the composite factors of M(665280) that are under 10,000 digits. Another milestone is that the currently smallest composite, the C149 from M(1575), is now testing at B1=3e6.

On Sunday we found the following P29 factor of M(12096) using ECM with B1=25e4. The remaining 996 digit composite has been released to the ECM servers.

M( 10296 )C: 13725885494537329238707696129
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Old 2003-09-12, 13:17   #29
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Default P11 for M(665280)

The following P11 was found using ecm.

M( 665280 )C: 28411447681

In a week or two I'll be organizing a short subproject that has a high probability of finding factors. I'll be emailing the people who have used the ecm servers to give them first crack at this - so please be sure the email address in the file ecmclient.cfg works. There is still time to get in on this project - smh has put together the package:

Quote:
Originally Posted by smh
I've put a zipfile (~800K) with the ecmclient and ecm.exe for various processors online here

Before you run ecmclient, put the right ecm.exe in the same folder and set the parameters in ecmclient.cfg
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Old 2003-09-16, 05:58   #30
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Factor found! 2_1760P.C386 / 87684230xxxxxxxxxxxxxxx. The other factor is a probable prime. I ran it though PRIMO and it came out as a prime. so i guess this number it completely factored ?
I also found another factor for another # with the co-factor being probable prime, but i guess its too big for primo to handle because primo gives me an internal error.
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Old 2003-09-16, 11:27   #31
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Did you try Primo 2.2.0 beta1?

"Larger discriminant table. Discriminants can now go down to -64,000,000 (instead of -8,000,000). The new table contains 230,000 discriminants (instead of 75,000)"

Luigi
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Old 2003-09-16, 12:22   #32
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Quote:
Originally posted by antiroach
Factor found! 2_1760P.C386 / 87684230xxxxxxxxxxxxxxx. The other factor is a probable prime. I ran it though PRIMO and it came out as a prime. so i guess this number it completely factored ?
I also found another factor for another # with the co-factor being probable prime, but i guess its too big for primo to handle because primo gives me an internal error.
Great work, antiroach!

Somebody with a fast computer reported this factor through the ecm server at wblipp.dynu.com over the weekend - was that you? I've been unsuccessful contacting him through the email in his ecmclient.cfg file.

I haven't seen a report of another factor with probable prime cofactor, so perhaps you aren't the same person. I'd like to get that second factor out of the server so that other people don't spend cycles trying to refactor it. If you'll let me know which number (post or PM or email) I'll mark it inactive while we sort out the details.
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Old 2003-09-16, 14:13   #33
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my email i used was peterzal at hotmail dot com. i guess that was me finding the factors. im running this on a xp2500 overclocked to a 3200 :). and yes i made a mistake about the 2nd probable prime cofactor. I was looking at the Type: field. What does the type field even tell us?

I have checked my hotmail account a few times, but its not really my primary one. I can PM you a different email address or you can just PM me with details about the side project. That is what you're trying to email me about isnt it?
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