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 2004-07-12, 22:57 #12 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 788910 Posts No one has claimed any of $10,000 available for algorithmic breakthroughs. The up to$20,000 for future awards clause was written before 39th, 40th, and 41st Mersennes were found. If you read the prize rules later on, this is down to $10,000. There is no accounting for this money or GIMPS because GIMPS, Inc does not yet officially exist and there is no money coming in or out. When it does exist, I guess tax records become public record for a non-profit corp. The$25,000 to charity can't be a tax write-off for me because first I'd have to declare $25,000 of income. Much easier to let GIMPS pay the charity directly. TTn's search for big non-Mersenne primes using the GIMPS source code and claiming the entire$100,000 award is perfectly legit. The source code clearly states the GIMPS prize rules only apply to Mersenne primes.
 2004-07-15, 20:29 #13 TTn   214408 Posts RMA Just to clarify, they are not nessesarily non-Mersenne primes, actually it is somewhat the contrary, as they are all included by default. But there are many more gM, than Mn so the likelyhood of finding an Mp(prime) is near zero, comparitively. Also, the area we are sieving now is 10,000,000 digits to 10,000,007 digits.(Riesel) So those Mp have already been tested. Last fiddled with by TTn on 2004-07-15 at 20:31
 2004-08-09, 20:05 #14 TTn   31×71 Posts 2005 C++ CD I got my copies of all the 2005 VS.Net softwares. I am unable to burn a copy for backup. The appearance of written data on the CD is somewhat oval in shape, rather than circular. Has anyone seen an oval-like pattern on any CD? Well it was a first for me anyway. Last fiddled with by TTn on 2004-08-09 at 20:05
 2004-08-09, 21:44 #15 Axel Fox     May 2003 25·3 Posts Since I seriously doubt that this kind of pattern would be caused by a software copy protection of some kind and since you make it seem like a very regular pattern (an oval), I would think that there is something wrong with your CD-Writer, making it unable to write in certain areas of the CD for some reason.
 2004-08-10, 02:08 #16 TTn   1B0A16 Posts oval Ofcourse I tested my burner on other CD's, and then switched back to try again. I doubt it too, but that is why I am asking if anyone has seen this kind of CD. It could be a way to verify the copy specifically, if it cross referenced the files systems. The ovalish pattern, does look like it has data swirling wavily, but not like a DVD. I never saw anything like it. A burner, to my knowledge usually burns linearly, which is not what I am looking at here, unless the burner could skip some areas, which in that area leaves behind a narrow strip of data towards the center of the disc. It then could skip to a wider area and continue burning. Just curious.
2004-08-15, 15:20   #17
patrik

"Patrik Johansson"
Aug 2002
Uppsala, Sweden

52·17 Posts

Quote:
 Originally Posted by TTn Has anyone seen an oval-like pattern on any CD?
My (musical) CD Hair, the musical, 1993 original London cast recording, has some kind of oval defect on it. It sometimes jumps when I play it in my old (1988) CD-player, but I have no problems in my computers or my car.

I didn't quite get it, is the pattern on the CD you are copying or on the one you are writing?

 2004-08-15, 22:31 #18 TTn   5·401 Posts lumpy oval The lumpy oval pattern, is on the c++2005 express CD. The data does not seem to be written in a typical spiral fassion. I dont think this is a defect though. "My (musical) CD Hair, the musical, 1993 original London cast recording, has some kind of oval defect on it. It sometimes jumps when I play it in my old (1988) CD-player, but I have no problems in my computers or my car. I didn't quite get it, is the pattern on the CD you are copying or on the one you are writing?"

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