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Old 2003-10-28, 04:58   #1
dsouza123
 
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Default Estimate of sieve duration for 2^811 - 1

I read the news at nfsnet.org mentioning that 2^811 could take as long as year.

http://www.nfsnet.org/status.html

I did some calculations, using the current rate of production the sieving would finish in July 2004.

There are roughly 70 machines ( 35 users ) active each day.

If you aren't currently working on nfsnet, consider joining in.
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Old 2003-10-28, 06:55   #2
Wacky
 
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Thanks for encouraging others to join. We NEED a lot more help.

First the good news. Paul has his cluster busy on the post-processing of M757 and other things. We should be able to get some time from it before we finish this sieving for M811.

But for the bad news. I'm not sure what method you used to make your estimate. If you are extrapolating relations per day, you must recognize that we are presently sieving at relatively low line numbers. The number of relations per line will drop as we get further into the work, but the effort will remain the same.

I seriously doubt that we will meet your projection unless there is a massive increase in participation.

But we WILL get there........


eventually.

Richard
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Old 2003-10-28, 21:13   #3
dsouza123
 
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I didn't realize that the number of relations per line sieved would vary substantially, it is about 2.25 relations per line now, so could it get as low as 1 for 1 or even lower ?

If it requires alot of work to figure it out please don't spend your time on it.

I hope more people will join in.
At least having this spot in the mersenneforum gives very good exposure.

Thanks to all who make it possible.

I would never have known about it otherwise.


Dan
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Old 2003-10-28, 22:48   #4
Wacky
 
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2.25 is the number that I hae for lines around 4M. The MSRC server jumped back to fill in 2M and is getting about 3.4 there.
Up at 10M, the LoneStar folks are getting about 1.63.

Above 50M, I don't have good numbers yet, but I am estimating that we will be below 0.75. Depending on how things fill in, we may have to go even higher and get only 0.65.

As we go along, I'll be able to improve my estimates. But, in any case, it's a lot of sieving. Bring your friends. There is plenty of work to spread around.

Richard
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Old 2004-01-23, 02:27   #5
junky
 
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hi, im new into that forum. Im running distributed contest for a couple of years now (RC5-64, SETI@home, ECCp-109, ECC2-109 (in progress) and im testing NSF now :)
i dont know if ya were expecting these numbers:
but we have:
40.69% complete (32553.3 of 80000 workunits)

later
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Old 2004-02-27, 01:03   #6
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hhehe, now the % is over 85%, pretty cool and we're still in February.

and for today, we reached a new record of lines ( http://www.nfsnet.org/stats2/statsre...gesize=&page=0 ) . so its really cool.

btw, i've a question for Richard, ya said: "2.25 is the number that I hae for lines around 4M. The MSRC server jumped back to fill in 2M and is getting about 3.4 there.
Up at 10M, the LoneStar folks are getting about 1.63."

whats the MSRC server and LoneStar is the name of a pool right ?

thanks.

Last fiddled with by junky on 2004-02-27 at 01:07
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Old 2004-02-27, 01:11   #7
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MSRC = Microsoft Research Cambridge
Lonestar is the Texas server run/maintained by Wacky ( Richard ).
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Old 2004-02-27, 01:31   #8
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Thanks for clarification :)

can i know who's is maintening the Fenland, and Longhorn server ?
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Old 2004-02-27, 01:54   #9
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Quote:
Originally Posted by junky
and for today, we reached a new record of lines ( http://www.nfsnet.org/stats2/statsre...gesize=&page=0 ) . so its really cool.
Actually the stats are a little funky right now. The total number of relations has dropped since yesterday. But I'm sure all will be back to normal in short order. Move along. Nothing to see here.

Greg
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Old 2004-02-27, 02:03   #10
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Longhorn is the new name for Lonestar, so it is maintained by Richard.

As for Fenland, I don't know for sure, but Fenland is near Cambridge so it probably is Paul.
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Old 2004-02-27, 02:14   #11
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thanks dan, sorry greg

hhehee
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