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Old 2006-09-05, 16:51   #23
StarQwest
 
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www.mersenne.org is now up and running. It still says M44 has probably been found! Does anyone know if it is 10M digits or not???

P.S. If anyone is interested in joining team StarQwest and searching for M45, post a reply to this messege.
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Old 2006-09-05, 16:53   #24
Andi47
 
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Quote:
Originally Posted by markr View Post
The 18:00 UTC report does list it, but the 17:00 report does not. (The archive at http://tuatara.sdsu.edu/primenet/ is a wonderful resource. Thank you, delta_t!) The cleared file for 18:00 has 14 new exponents, four with 10 million digits, four in double-check territory, and six in between.
Thanks - *bookmarking the linked site*

Quote:
Originally Posted by jinydu View Post
So can we form that list of candidates?
Here it is - exponents cleared yesterday between 17:00 UTC and 18:00 UTC (I inserted an L for first time Lucas Lehmer testing):

Code:
14976869 66 L 0x7AB64A4C5E7107__ 04-Sep-06 17:56 shaneamy Jason
17433547 66 D 0x310749641415DB__ 04-Sep-06 17:58 ebravick ursjail00b.1
17787467 66 D 0x5F4D90B6DF8B55__ 04-Sep-06 17:36 TempleU-CAS FL-SLE
17793667 66 D 0x60A331ED249105__ 04-Sep-06 17:03 phillipkwood pwoodlaptop
28222451 69 L 0x60B3F790BFDBE0__ 04-Sep-06 17:22 philnelson pm26
28551353 69 L 0x15F76D65869BB1__ 04-Sep-06 17:24 S373561 CD88C8DB9
29225803 69 L 0xB6C80136DB7FED__ 04-Sep-06 17:40 mcobb a2-170.0
31170443 69 L 0x03817977DEC42A__ 04-Sep-06 17:29 S405624 ipt_lab
31618063 68 L 0x98AE571681AD70__ 04-Sep-06 17:10 whjelsma mbj
32582657 68 L 0x663C8660956654__ 04-Sep-06 17:33 curtisc wd-102--04l
34569637 69 L 0xDC7FAE962B7DF7__ 04-Sep-06 17:36 sitbon C015A9015
35500939 68 L 0xCE86BDB434FE70__ 04-Sep-06 17:41 rc 1
35533969 68 L 0x1B56C4AA4C5716__ 04-Sep-06 17:10 tangseng weak
35607629 68 L 0xC9C6D29A7C6B35__ 04-Sep-06 17:42 computist LINIST
Edit: removed expos cleared with a factor.

Edit2: What's the story with 14976869? Was this a first time LL or a doublecheck?

Last fiddled with by Andi47 on 2006-09-05 at 16:56
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Old 2006-09-05, 17:23   #25
Jeff Gilchrist
 
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Quote:
Originally Posted by gbvalor View Post
Very good new, precisely the day I'm back to work after a nice summer vacaction !!!
Yes good timing, I just returned from vacation myself.
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Old 2006-09-05, 17:37   #26
wpolly
 
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My encrypted guess: 690116611
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Old 2006-09-05, 17:46   #27
victor
 
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"32582657 68 L 0x663C8660956654__ 04-Sep-06 17:33 curtisc wd-102--04l"
Well, I hope it won't be this 'team' again
One mersenne in one life is enough
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Old 2006-09-05, 19:31   #28
Uncwilly
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Maybe the mods can split out the M44 stuff into a new thread.....

Thanks!

Last fiddled with by Uncwilly on 2006-09-05 at 19:43 Reason: Done. (By akruppa). Thanks (uncwilly)
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Old 2006-09-05, 20:00   #30
Jeff Gilchrist
 
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Just to let everyone know, I started a verification run yesterday on an Itanium2 system using 16 CPUs with Guillermo's glucas software. I was having a few problems using OpenMP but the pthreads version seems to be running stable now. So far I have completed just 2.5%.

It is a shared system so the speed is fluctuating slightly depending on the load but the verification should be complete between 9 to 11 days from now.

An interesting observation, I also have it running on an Opteron 275 (2.2 GHz) dual dual-core system using 4 CPUs to verify that I got it working properly on the Itanium. The Opteron system is running about half the speed of the 16 Itanium2 1.6 GHz processors which is a great show of how good the hyper-transport bus of the Opteron is.
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Old 2006-09-05, 20:29   #31
Mystwalker
 
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Quote:
Originally Posted by Jeff Gilchrist View Post
the verification should be complete between 9 to 11 days from now.
So it seems to be smaller than the last found prime.
There, it took you 12-13 days, plus there was probably more free CPU time around christmas (but now, we have holiday season)...
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Old 2006-09-05, 21:41   #32
T.Rex
 
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Hello Jeff,
Quote:
Originally Posted by Jeff Gilchrist View Post
An interesting observation, I also have it running on an Opteron 275 (2.2 GHz) dual dual-core system using 4 CPUs to verify that I got it working properly on the Itanium. The Opteron system is running about half the speed of the 16 Itanium2 1.6 GHz processors which is a great show of how good the hyper-transport bus of the Opteron is.
Hum. Remember that GLucas is not NUMA-aware. With a benchmark like SPECjbb2005, which can be run in a way NUMA is perfectly managed, large Itanium2 machines show perfectly scalable. Though Opteron-made machines are not. Due to the design of its memory bus, Intel's WoodCrest also is not scalable (I've experimented with prime95 benchmark).
About verifying M44, I was at Hospital all day today for helping my wife. So, I missed the early emails ... I've discovered the story less than 2 hours ago. Tomorrow, I'll ask Bull managers if they are interested in verifying M44. If yes, and if a machine is available, that should take only 6 days, I guess. But, for the first time out of 4, a big Mersenne prime is not discovered during French vacations, so probably all machines are already used for very important projects. I'll let you know.
Regards,
Tony
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Old 2006-09-05, 21:51   #33
patrik
 
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I guessed the number and had a look in the status files from Aug 25 about the history of the computer that reported the new prime. If I am correct, it has had one confirmed test and 17 tests awaiting double-check. The error codes have always been zero (no errors).
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