Mersenne Digest Monday, July 2 2001 Volume 01 : Number 866 ---------------------------------------------------------------------- Date: Sun, 1 Jul 2001 01:07:02 +0200 From: "Hoogendoorn, Sander" <[EMAIL PROTECTED]> Subject: RE: Mersenne: 33mio exponents Guido Lorenzini wrote: > 1st observation: > the "beerman's" computer named SKA4 seems to work simultaneously on 4 > 33mio exponents, since each exponent is getting iterations: how it > come? If any Cpu is best working on just one copy of prime95, even a > dual cpu PC should have 2 computer ID...You may see the same situation > with DEJEFLATERIC of netconx, but, once again, these are just examples. It is possible to use the same computer ID for several computers. This can happen if you copy the prime95 directory to other computers. For example when installing prime95 over a network, or when cloning a disk to another pc. > 2nd: > Sometimes it happens that an exp. is assigned to an unspecified computer > ID (for example, the account "kpgcfd", has some). Is it possible? Yes, you can leave the computer ID blank. If you leave your account ID blank the primenet server asigns you one. _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Sun, 1 Jul 2001 09:05:12 -0000 From: "Brian J. Beesley" <[EMAIL PROTECTED]> Subject: Re: Mersenne: 33mio exponents On 30 Jun 2001, at 20:16, Guido Lorenzini wrote: > 1st observation: the "beerman's" computer named > SKA4 seems to work simultaneously on 4 33mio exponents, since each > exponent is getting iterations: how it come? If any Cpu is best > working on just one copy of prime95, even a dual cpu PC should have 2 > computer ID...You may see the same situation with DEJEFLATERIC of > netconx, but, once again, these are just examples. This looks odd, but in fact I can set up as many systems as I like with the same computer id, making many systems appear to be one. I can also confuse the issue by changing the computer id on a single system, making one system appear to be many. > 2nd: Sometimes it > happens that an exp. is assigned to an unspecified computer ID (for > example, the account "kpgcfd", has some). Is it possible? Yes. When I joined the project more than three years ago, blank computer IDs were very common. The server software has been changed to automatically assign computer IDs to new systems being set up when the user has not set the computer ID himself, but there are still a number of systems running with blank IDs which have been active since before this change was made. > 3rd: Net_Force seems to have some wonderful machines, called > (properly!)10MIL-X: they are able to test (or factoring) dozen of > 33mio exponents in 2 months time or more! Any information about the > processor of these machines? Or is it relevant the fact bits? (60 or I don't know what's going on here. The fact bits just means that when the assignment was given out, that's the factoring depth that was done. For exponents of this size, you're supposed to complete factoring to 68 bits before starting the LL test. > 4th: netconx > reserved 2,325 33mio exps on its computer ID DEJECHRISTIA, most of > them with 60 fact bits or less. It started getting 'em on June 20th at > 4:59 AM, one each two minutes, till June 23th at 12:07 PM. Now it may > be too long to explain but this mass of 33mio exps. seems to be > bounced like a ball from an account to another (e.g. from kpgcfd, ID > mac_233, on May to netconcx by now); then these exponents, assigned in > June to netconx to computer ID DEJECHRISTIA, were assigned to the same > account netconx, but to a machine called BART, in April 7th. I really > do not understand what's going on... Is there anybody who may give me > do not understand what's going on... Me neither. I reckon that big block of exponents expired & got picked up again. The only thing that seems to make any sense is that someone is running in a Beowulf cluster that happens to have no net connection (maybe because it's running in a highly secure environment), so they're using one system to collect work & then farm it out locally. Anyway it's doing no harm, so long as they leave a few assignments for other people to pick up! It will be interesting to see what happens in a few months, when (if my guess is true) there may be a big block of results coming in more or less at the same time. Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 3 Jul 2001 09:20:22 +0200 From: "Lars Lindley" <[EMAIL PROTECTED]> Subject: Mersenne: Solaris 8 This is a multi-part message in MIME format. - ------=_NextPart_000_0032_01C103A1.628CB0D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi everyone. Have any of you been running mprime under Solaris 8? I'm thinking of installing that but I want to be sure that mprime works = flawlessly.. Happy hunting! /Lars - ------=_NextPart_000_0032_01C103A1.628CB0D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 5.50.4616.200" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hi everyone.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Have any of you been running mprime = under Solaris=20 8?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I'm thinking of installing that but I = want to be=20 sure that mprime works flawlessly..</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Happy hunting!</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>/Lars</FONT></DIV></BODY></HTML> - ------=_NextPart_000_0032_01C103A1.628CB0D0-- _________________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ End of Mersenne Digest V1 #866 ******************************