20040813, 19:21  #1 
Jul 2004
Mid Calder, Scotland
5·37 Posts 
How long before you found your first composite number?
Hey Guys,
Hope this is the right thread! How long was it before your first composite number on any test? I have a number of tests running and I haven't found a single composite number yet (I've been on the search for 5 months)! I was wondering if I had hit a "rich vein" of exponents that might yield something nice or if this was an everyday occurence? Any comments?? Cheers, Mark 
20040813, 21:13  #2 
Sep 2002
2·331 Posts 
The first one, I don't know but in the past 11.5 months I've found 17 factors
doing TF (Trial Factoring) 24/7 so on average 1 every 20 (24h) days using two PC's so about 1 every 40 days for one PC. 1 Ghz PCs If you do LL (LucasLehmer first time tests) then very nearly every time you send in a result it is a composite, just don't know the factors, only the extremely rare ones are Mersenne primes. Last fiddled with by dsouza123 on 20040813 at 21:14 
20040814, 11:26  #3  
Banned
"Luigi"
Aug 2002
Team Italia
12F0_{16} Posts 
Quote:
Luigi 

20040814, 12:21  #4  
Oct 2003
Australia, Brisbane
2·5·47 Posts 
Bundu: I am a little confused by what you have said.
Quote:
1) You just finished your first LL test after 5 months or 2) You have been factoring for 5 months but have not yet found a factor. Therefore have been unable to prove that any of the numbers that you have been tested to be composite or prime. or I am completly off on the wrong track? I am assuming that you are working for GIMPS?? Am I right?? 

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