Delivered-To: luke@ndatech.com X-Sender: rugeley@pop3.demon.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Sat, 15 Dec 2001 22:43:34 +0000 To: Luke Welsh From: mersenne-digest-invalid-reply-address@base.com (Mersenne Digest) (by way of Gordon Spence ) Subject: Mersenne Digest V1 #908 Mersenne Digest Wednesday, November 21 2001 Volume 01 : Number 908 ---------------------------------------------------------------------- Date: Mon, 19 Nov 2001 19:57:04 -0800 From: Spike Jones Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) > Spike Jones (hey, Spike!) wrote > > >Lets have a Bay Area GIMPS party! > >Same place as before? Ill have the prime rib. {8-] spike > > EWMAYER@aol.com wrote: I'm game (well-seasoned venison, in fact :), > ...little PrimeFest before the years' end? > > If not, Spike and I (and anyone else who cares to join us) > will have to party without you, and where's the fun in that? > > -Ernst There are others in neighborhood. As I recall last time was kind of an inconvenient time for a lot of em, dont recall the circumstances. Ernst my wife spoke at length about what a nice man you are. So now I sleep with one eye open. {8^D GIMPSers! Where are you? Lets party! spike _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 19 Nov 2001 21:48:08 -0800 From: Spike Jones Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) I have been wanting to do that number theory conference in Monterey. Perhaps invite the number theorists to join us? Alternate suggestion: have a small gathering of the locals at the Tied House in Mountain View some weekday evening the week after Thanksgiving, and do still get together at the Monterey math schmooze? spike John R Pierce wrote: > > The Western Number Theory Conference > > > > http://home.earthlink.net/~bartgoddard/mainpage.html > > > > meets in Monterey (acutally Asilomar) > > then it would follow we should meet in the Monterey area. Santa Cruz is a > 45 minute drive from Monterey, silicon valley 90 minutes or so. I'd be glad > to recommend a restaraunt for this, I've lived in the area since 1977.. One > of my favorite places down there is a superb Chinese restaraunt in Carmel, > but this would only be suitable for 8-12 people max. There are lots of > other good places down there, or if folks wanted to drive a *few* miles, we > could meet in Moss Landing at Phil's Fish Market for the best chowder and > choppino on the west coast (and all kinda other fresh local seafoods as well > as some pasta dishs for those who won't eat fish). Phil's is quite large, > and if we have a headcount, reserving the back area on a tuesday shouldn't > be too tough. I think this would work for 20-30 folks there. > > _________________________________________________________________________ > Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm > Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 00:17:34 -0600 From: handmade@soncom.com Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) I am not interested in parties, ratings for highest contributions, number assignments, or information on microprocesor speeds. I am writing a machine language program to find the next 'greater than 10,000,000 digits' mersenne prime. Anyone have any ideas for a algorithm, or approach that has not been discussed lately? Thanks Dan At 07:57 PM 11/19/2001 -0800, you wrote: >> Spike Jones (hey, Spike!) wrote >> >> >Lets have a Bay Area GIMPS party! >> >Same place as before? Ill have the prime rib. {8-] spike >> >> EWMAYER@aol.com wrote: I'm game (well-seasoned venison, in fact :), >> ...little PrimeFest before the years' end? >> >> If not, Spike and I (and anyone else who cares to join us) >> will have to party without you, and where's the fun in that? >> >> -Ernst > >There are others in neighborhood. As I recall last time >was kind of an inconvenient time for a lot of em, dont >recall the circumstances. Ernst my wife spoke at length >about what a nice man you are. So now I sleep with one >eye open. > >{8^D > >GIMPSers! Where are you? Lets party! spike > > >_________________________________________________________________________ >Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm >Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers > > _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 19 Nov 2001 23:55:48 -0800 From: Luke Welsh Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) We will be discussing *the* latest algorithms at the party. That's the best way to get particulars out of Ernst. - --Luke At 12:17 AM 11/20/01 -0600, handmade@soncom.com wrote: >I am not interested in parties, ratings for highest contributions, number >assignments, or information on microprocesor speeds. > >I am writing a machine language program to find the next 'greater than >10,000,000 digits' mersenne prime. > >Anyone have any ideas for a algorithm, or approach that has not been >discussed lately? > >Thanks >Dan _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 20:49:33 +0000 From: Gareth Randall Subject: Mersenne: Primenet communication details. Hi, Could someone just confirm to me the server or DNS name that is contacted by the mprime client in order to transfer information. I understand this uses the HTTP protocol on port 80. Is this correct? I plan to relocate my mprime to a more powerful system. However, this system won't be dialled up directly and it would be good if this system could request a dial-up when it requires it. Thus the following idea: Have an option that mprime can run a program of the user's choice when it wants to make a network connection for any reason, and perhaps another when it has finished. As both of these are noted in the "-d" output, this should be very simple to code in. Yours, ======= Gareth Randall ======= _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 23:46:06 +0100 From: "Martijn Kruithof" Subject: Re: Mersenne: Primenet communication details. Are you talking about a linux system?! Add a cron job executing: ifup ppp0 (or your distro's equivalent to get up the dail up link) sleep 10 mprime -c sleep 5 ifdown ppp0 Every week for instance (also configure mprime accordingly) Configure mprime to not contact priment automatically. Kind regards, Martijn - ----- Original Message ----- From: "Gareth Randall" To: Sent: Tuesday, November 20, 2001 9:49 PM Subject: Mersenne: Primenet communication details. > Hi, > > Could someone just confirm to me the server or DNS name that is contacted by the mprime client in order to transfer information. I understand this uses the HTTP protocol on port 80. Is this correct? > > I plan to relocate my mprime to a more powerful system. However, this system won't be dialled up directly and it would be good if this system could request a dial-up when it requires it. Thus the following idea: Have an option that mprime can run a program of the user's choice when it wants to make a network connection for any reason, and perhaps another when it has finished. As both of these are noted in the "-d" output, this should be very simple to code in. > > Yours, > > ======= Gareth Randall ======= > > > _________________________________________________________________________ > Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm > Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers > _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 19:54:16 -0500 From: A & T Schrum Subject: Mersenne: AMD XP 1600+ Hi Folks, I looked but hadn't found how an AMD XP 1600+ should identify itself within Prime95. It calls the processor a Cyrix 6x86 running at 144 MHz when it is running on a 1400 MHz motherboard. I set it to an Athlon at 1400 and it passed the torture tests and seems to work, but are the settings correct for an AMD XP 1600+? Also, will the Prime95 FFT be recoded to take advantage of the AMD SSE2 instructions like it was for the P4? Regards, - -Allan _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 21:11:56 -0500 From: George Woltman Subject: Re: Mersenne: AMD XP 1600+ At 07:54 PM 11/20/2001 -0500, A & T Schrum wrote: >I looked but hadn't found how an AMD XP 1600+ should identify itself >within Prime95. It calls the processor a Cyrix 6x86 running at 144 MHz >when it is running on a 1400 MHz motherboard. I set it to an Athlon at >1400, are the settings correct for an AMD XP 1600+? Yes. BTW, if someone wants to improve the code in prime95 to properly identify AMD chips, I'd be glad to include it in a new release. Contact me and I'll point you at the code that needs tweaking. >Also, will the Prime95 FFT be recoded to take advantage of the AMD SSE2 >instructions like it was for the P4? No AMD chips support SSE2 instructions. When AMD does release such a chip, the program will be able to use them (either by lying and calling your CPU a P4 or by using the CpuSupportsSSE2 option described in undoc.txt. _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 03:45:04 +0100 From: mohk Subject: Re: Mersenne: AMD XP 1600+ I think it is better to use the P4 setting (if you can) because you have the advantage of the SSE and the faster FPU 8) Greets, Mohk PS: It should be easy to hack the code to enable the P4 setting, just skip the CPU detection ;) At 01:54 11/21/2001, you wrote: >Hi Folks, > >I looked but hadn't found how an AMD XP 1600+ should identify itself >within Prime95. It calls the processor a Cyrix 6x86 running at 144 MHz >when it is running on a 1400 MHz motherboard. I set it to an Athlon at >1400 and it passed the torture tests and seems to work, but are the >settings correct for an AMD XP 1600+? > >Also, will the Prime95 FFT be recoded to take advantage of the AMD SSE2 >instructions like it was for the P4? > >Regards, > >-Allan > >_________________________________________________________________________ >Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm >Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 11:21:37 +0100 From: Johan Winge Subject: Re: Mersenne: celebrate [OT] At 21:09 2001-11-18 +0100, Steinar H. Gunderson wrote: >On Sun, Nov 18, 2001 at 01:09:18PM -0500, Jud McCranie wrote: >>I should have suggested this yesterday, but let's have a meteor shower to >>celebrate the probable discovery of a new Mersenne prime! > >Big, big disappointment here in Norway -- I was outside for about an hour >during the "maximum", _nothing_ to be seen. No clouds at all, perfectly >clear, but not a single meteor. :-( Oh, so _that_ was it! I was outside the whole night Sunday to Monday, (standing in line for tickets to The Lord of the Rings,) and I noticed that it was unusually many stars falling... So it had a natural explanation after all! :-) And I got excellent tickets to the first screening, by the way! :-D - -- Johan Winge _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Tue, 20 Nov 2001 18:30:17 -0800 From: Todd Sauke Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) GIMPSers, I'm up for joining a get-together in the San Jose/Mountain View area depending on specific timing. Wasn't there a previous at the Tied House in Mountain View? That would be great for me. Todd Sauke (Faithful list reader and one-machine cruncher, but infrequent poster.) >> Spike Jones (hey, Spike!) wrote >> >> >Lets have a Bay Area GIMPS party! >> >Same place as before? Ill have the prime rib. {8-] spike >> >> EWMAYER@aol.com wrote: I'm game (well-seasoned venison, in fact :), >> ...little PrimeFest before the years' end? >> >> If not, Spike and I (and anyone else who cares to join us) >> will have to party without you, and where's the fun in that? >> >> -Ernst > >There are others in neighborhood. As I recall last time >was kind of an inconvenient time for a lot of em, dont >recall the circumstances. Ernst my wife spoke at length >about what a nice man you are. So now I sleep with one >eye open. > >{8^D > >GIMPSers! Where are you? Lets party! spike > > >_________________________________________________________________________ >Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm >Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 18:08:20 -0000 From: bjb@bbhvig.uklinux.net Subject: Re: Mersenne: AMD XP 1600+ On 20 Nov 2001, at 21:11, George Woltman wrote: > At 07:54 PM 11/20/2001 -0500, A & T Schrum wrote: > >I looked but hadn't found how an AMD XP 1600+ should identify > >itself within Prime95. It calls the processor a Cyrix 6x86 running > >at 144 MHz when it is running on a 1400 MHz motherboard. I set it > >to an Athlon at 1400, are the settings correct for an AMD XP 1600+? > > Yes. BTW, if someone wants to improve the code in prime95 to > properly identify AMD chips, I'd be glad to include it in a new > release. Contact me and I'll point you at the code that needs > tweaking. I changed the CPU in one of my systems (running mprime) from Athlon 1200/266 to Athlon XP 1700+. I did nothing except change the CPU speed in the menu. The speed improved - by about 17%, which is about what is expected - and it's running 7C cooler, but that almost certainly has more to do with the fact that I also changed the cheap "AMD approved to 1.3GHz" CoolerMaster heatsink/fan for a Thermaltake unit (with the 26 cu ft/min YS fan, not the 38 cu ft/min Delta fan, which might do a better job of cooling but is _very_ noisy!) Is there an issue here in that Prime95 (& presumably NTPrime) detects the processor at startup but mprime doesn't? Or does the program only "guess" the CPU type & speed when the program is installed? BTW Athlon XP all run at 266 FSB. It looks as though the "speed rating" relates to the actual core speed as follows: Take "speed rating" (1600 in the case of an Athlon XP 1600+) Add 500 (2100) Divide by 1.5 (1400) Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 18:08:20 -0000 From: bjb@bbhvig.uklinux.net Subject: Re: Mersenne: Primenet communication details. On 20 Nov 2001, at 23:46, Martijn Kruithof wrote: > Are you talking about a linux system?! > > Add a cron job executing: > > ifup ppp0 (or your distro's equivalent to get up the dail up link) > sleep 10 ; mprime -c ; sleep 5 ; ifdown ppp0 > > Every week for instance (also configure mprime accordingly) > Configure mprime to not contact priment automatically. ... but isn't there an option for autodial - in linux as well as windoze? Personally I don't use it because I've had trouble with autodialled connections not dropping - and I'm on a pay-by-time connection :( BTW if you use the above script you should set your "days between sending new end dates" to _6_ rather than 7. The reason is that mprime -c will do nothing unless prime.spl exists, and prime.spl will not be created until the next multiple of 65536 iterations following N days since the last PrimeNet checkin. Gareth, the server used is 216.120.70.80. Yes, the destination port used is (TCP) port 80. Unless you have the network protocol set to RPC, which is deprecated. Unfortunately the source port is "random" but if you configure your firewall to allow outbound connections to TCP port 80 to 216.120.70.80 and inbound packets from any host on any TCP port provided the connection is open you will be OK. If you want to be _truly_ paranoid, allow inbound packets for open TCP connections on source port 80, any destination port from 216.120.70.80 only, but don't be surprised if your web browser has difficulty reaching other hosts! Less paranoid configuration to allow web browsing & PrimeNet comms on port 80, but block attempts to activate stealth trojans (which of course you shouldn't have): permit inbound, open TCP connections, source port 80, any host block inbound, open TCP connections, any other source port, any host You can add extra "permit inbound" for other services as needed, but ftp is a problem - you either allow inbound connections on port 20, or use passive ftp & accept incoming packets on open TCP connections on random ports. Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 21:08:41 +0100 From: Guillermo Ballester Valor Subject: Re: Mersenne: SF Bay GIMPS party Hi all, Most of GMIPSers are far away from S. Francisco Bay Area. Far enough to have not any chance to be in the party, like me :( It would be nice that some of you make some nice pictures of the party and put together in a page with some funny history of the event. So, the envious guys like me could see and imagine how the party was :). In addition, we could watch some picture of people we have mailing for some years. Regards from Spain, Europe. Greetings to US people. Guillermo. EWMAYER@aol.com wrote: > > Spike Jones (hey, Spike!) wrote > > >Lets have a Bay Area GIMPS party! > >Same place as before? Ill have the prime rib. {8-] spike > - -- Guillermo Ballester Valor gbv@oxixares.com Granada (Spain) _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 19:58:21 -0500 From: George Woltman Subject: Mersenne: M#39 update Hi all, My unofficial verification is on track to complete Saturday afternoon. The official independent, different machine, different program verification will complete about Dec 6th. Happy Thanksgiving, George _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 19:23:48 -0700 From: "Matt Goodrich" Subject: Mersenne: Restarting several LL.DC checks I have a question for the group. What would be the best way to restart 6 assignments I was working on. I just rebuilt all 6 of these PC's and had everything including the Prime files saved on a separate HD on a Server. That HD failed before I got the information off of it. It is unrecoverable. Lost over 3 GB's of data. :( Should I just install Prime again, set it up with the same name (on each PC) etc. and add the proper exponent to the worktodo file, or is there a better way to do this. I don't want to get the server confused over what I am doing. Thanks Matt _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Wed, 21 Nov 2001 21:09:19 -0800 From: Spike Jones Subject: Re: Mersenne: Re: SF Bay GIMPS party (was Mersenne #39) Todd Sauke wrote: > I'm up for joining a get-together in the San Jose/Mountain View area > depending on specific timing. Wasn't there a previous at the Tied House in > Mountain View? That would be great for me. Todd Sauke OK. Lot of us are going to Gramma's for Thanksgiving. Lets shoot for about the first week of December? Whats the second Tuesday after Thanksgiving? Tied House again? Alternatives? The Tied House is good food but its kinda loud. On the other hand we went last time on a Friday night, so midweek might be quiet enough to talk about math and confusers. spike _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ End of Mersenne Digest V1 #908 ******************************