Mersenne: Rambus Memory
Intel benchmarks show little advantage to Rambus! A new series of benchmarks have emerged that show Rambus memory provides less oomph than cheaper, standard high-speed memory. And the odd part is that the tests come from Intel, the major proponent of Rambus. In benchmark tests conducted by Intel, computers equipped with standard high-speed memory and Intel's 815 chipset outperformed similarly configured PCs with Rambus memory and the corresponding 820 chipset from the company. Full story at: http://news.cnet.com/news/0-1003-200-2242968.html [EMAIL PROTECTED] wrote: Direct RDRAM HOLY WAREveryone knows (rather, should know) that RDRAM memory provides a minor speed boost compared to SDRAM, and the much higher cost of RDRAM is completely unjustified. I've heard that Dell is switching back to SDRAM in its computers now, which is a Good Thing(TM)./HOLY WAR _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Mersenne: And the winner is....
RE: Statistical Analysis of Prime Exponent Mersennes After much private debate, I'm providing the following I have inquired and received information about. Please, don't flame me or ask me to explain further, as I'm only the messenger and don't have all the answers myself... Q: Can all the data be posted to the list? A: HA! Not likely. The current size of 1.43TB of "raw" data which must be "interpreted" (taking 25+ times the space) is too large. I don't know about others, but I don't have the 20+ years to download the data over a 56K modem if posted to the list... Q: What algorithms are used? A: 'A variety of standard algorithms and methodologies used in traditional and non-traditional statistical analyses. Used in large number of complex, unique and even 'unusual' relations.' Q: Is the code and/or program available? A: 'No. Major chunks of code are proprietary, licensed, patented [or pending] or 'otherwise' restricted from distribution. Typical PC unable to run; Lack of memory or storage.' Q: Can you provide data on M727, M751, M#39, M#40, M*10M-digit? A: 'Here is info.' ACTUAL (REAL-LIFE INTERPRETED) DATA: M727 - 94.3716% probability - 2 factors M727 - 52.8693% probability - 3 factors M727 - 6.0014% probability - 4+ factors M727 - 91.1834% probability - 313-bit min. factor size M727 - 93.0447% probability - 428-bit max. factor size M727 - 21.7336% probability - highly composite factors M751 - 83.8467% probability - 2 factors M751 - 74.2974% probability - 3 factors M751 - 19.5801% probability - 4+ factors M751 - 87.2999% probability - 281-bit min. factor size M751 - 81.0003% probability - 526-bit max. factor size M751 - 30.1716% probability - highly composite factors M#39 - 53.7390% probability - range=10987349-11013853 M#39 - 64.0127% probability - range=10914203-11092621 M#39 - 81.6073% probability - range=10793527-11204183 M#39 - 97.3391% probability - range=10526447-11390453 M#40 - 61.4726% probability - range=13430227-13501387 M#40 - 77.3902% probability - range=13359163-13592549 M#40 - 86.0715% probability - range=13231913-13684399 M#40 - 96.5507% probability - range=13092361-13973117 M#43 - 58.3097% probability - range=41976841-42057331 M#43 - 71.6352% probability - range=41901683-42138559 M#43 - 79.7464% probability - range=41753977-42302809 M#43 - 93.4218% probability - range=41564021-42516373 NOTE: Highly composite means 6 or more factors of the factor - 1... Eric _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Mersenne: Better late then never?
Hi! All, I apologize if some of the following message are a little late, but I've been "out of commission" recently. At least they're better late than never Eric _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Re: Mersenne: Credit for factors found using P-1 tests
Terry S. Arnold wrote: I don't appear to have gotten credit for a factor found with P-1. What is the procedure for getting credit for a factor found during P-1 testing as part of Double checking? Currently, PrimeNet does not provide credit for P-1 factoring. As I recall, George has said v21 will support it, but there will have to be some modifications to the server to allow the crediting to occur... Eric _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Mersenne: P-1 Database
Wanted: Brave Souls Re: P-1 Testing small exponents Besides exponents in the 200,000 - 500,000 range that are available, new ranges in the 751 - 100,000 are now available! Note, however, the smallest exponents have been tested to some degree already. As a result, they will take a good degree of time to test. Some save files are available though! If you're interested in P-1 testing some small exponents, let me know. For exponents under 30,000, bounds of at least B1 = 1E8 (100M) and B2 = 4E12 (4B) are requested... Eric _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt
Mersenne Digest V1 #763
Mersenne Digest Sunday, July 30 2000 Volume 01 : Number 763 -- Date: Thu, 27 Jul 2000 00:04:38 -0400 From: Bruce A Metcalf [EMAIL PROTECTED] Subject: Re: Mersenne: Prime95 shutdown mystery. Several folks have responded privately about my problem with Prime95 crashing, much thanks. All recommended: In prime.ini, change/add the line: UseHTTP=1 Having made thsi change, the program now runs, but I can't get any response from PrimeNet other than: ERROR 2250: Server Unavailable. And a referral to a faq that recommends the same change. Any ideas about what I should try next? Bruce A. Metcalf mailto:[EMAIL PROTECTED] http://myweb.magicnet.net/bmetcalf _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt -- Date: Thu, 27 Jul 2000 13:32:19 - From: "Brian J. Beesley" [EMAIL PROTECTED] Subject: Re: Mersenne: Prime95 shutdown mystery. On 27 Jul 00, at 0:04, Bruce A Metcalf wrote: Having made thsi change, the program now runs, but I can't get any response from PrimeNet other than: ERROR 2250: Server Unavailable. And a referral to a faq that recommends the same change. Any ideas about what I should try next? Since it seems to be working OK for me, it's possible you have a name lookup problem. If you have an entry for entropia.com in your hosts file (somewhere under the Windows directory, or in /etc on a linux system) try removing it, then try again. If you don't have an entry for entropia.com in your hosts file, or the above fix doesn't work, try adding the following line to it: 216.120.70.80 entropia.com (Funnily enough the format is the same for both windoze linux!!) If it _still_ doesn't work, try tracing your route to 216.120.70.80 using the traceroute tool in linux, or a suitable Windows utility - I use reccomend the freeware utility "CyberKit" which can be freely downloaded from numerous places. The distribution file I'm using is just under 1MB in size, but I probably don't have the latest version. You may find that you are being blocked at a firewall, at least traceroute will identify if this is the cause of your problem and also the exact point where the problem lies. But my guess is that you have an incorrect DNS mapping for the PrimeNet server stuck in whatever name service you're depending on. In which case patching the hosts file will fix the problem - however, leaving you vulnerable to the same thing happening should the server change its address again :( Regards Brian Beesley _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt -- Date: Thu, 27 Jul 2000 15:48:35 +0200 From: "Steinar H. Gunderson" [EMAIL PROTECTED] Subject: Mersenne: Re: Prime95 shutdown mystery. On Thu, Jul 27, 2000 at 01:32:19PM -, Brian J. Beesley wrote: If it _still_ doesn't work, try tracing your route to 216.120.70.80 using the traceroute tool in linux, or a suitable Windows utility - I use reccomend the freeware utility "CyberKit" which can be freely downloaded from numerous places. There is a tracert.exe included with Win95 and Win98, at least. /* Steinar */ - -- Homepage: http://members.xoom.com/sneeze/ _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.exu.ilstu.edu/mersenne/faq-mers.txt -- Date: Thu, 27 Jul 2000 12:54:32 -0400 From: Bruce A Metcalf [EMAIL PROTECTED] Subject: Re: Mersenne: Prime95 shutdown mystery. At 01:32 PM 7/27/00 -, Brian J. Beesley wrote: On 27 Jul 00, at 0:04, Bruce A Metcalf wrote: Having made thsi change, the program now runs, but I can't get any response from PrimeNet other than: ERROR 2250: Server Unavailable. Since it seems to be working OK for me, it's possible you have a name lookup problem. If you don't have an entry for entropia.com in your hosts file ... try adding the following line to it: 216.120.70.80 entropia.com Tried -- no change. If it _still_ doesn't work, try tracing your route to 216.120.70.80 using the traceroute tool in linux, or a suitable Windows utility Windows [tracert] found 216.120.70.80 without problem. Thanks to all for the efforts to date. Please continue, as I'm sure this is something we can overcome. Bruce A. Metcalf mailto:[EMAIL PROTECTED] http://myweb.magicnet.net/bmetcalf _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ --
