20080806, 21:13  #56 
Sep 2004
2×5×283 Posts 
I advise all to share the primes found so that we all can take them out from our current files reducing the testing time. Thanks.
michaf, you can take the 7 I found so far from your range. It will eliminate 147 candidates, 5880 seconds of work taken using a 2.96GHz machine. Last fiddled with by em99010pepe on 20080806 at 21:19 
20080806, 22:51  #57  
Jan 2005
479 Posts 
Quote:
But thanks for warning anyway 

20080807, 06:40  #58 
Sep 2004
2×5×283 Posts 
6859514 51502
40316644 51786 24925372 51893 14994106 57376 Last fiddled with by em99010pepe on 20080807 at 07:39 
20080807, 11:15  #59 
May 2007
Kansas; USA
2·5^{2}·7·29 Posts 
I have removed the 11 k's with primes found from the remaining posted files.

20080807, 22:45  #60 
Sep 2004
2·5·283 Posts 

20080808, 05:46  #61 
Jan 2005
737_{8} Posts 
Please stop finding primes until I'm done now :) It's starting to disencourage ;)
I'm at 75% of my range and still have found not a single prime... Does anyone know the expected number of primes in the say 60k / 70k region? 
20080808, 06:26  #62 
Sep 2004
2×5×283 Posts 

20080808, 07:29  #63 
Sep 2004
2×5×283 Posts 

20080808, 07:35  #64  
May 2007
Kansas; USA
2×5^{2}×7×29 Posts 
Quote:
In your n=1K range, there are approximately 2140 canditates for k's that didn't currently have a prime before Carlos's most recent single prime. The chance of a prime on a sieve to P=150G for this base and nrange are 1 in ~1500. Therefore, you should expect, on average, 1.4 primes in your range. At the beginning of the range, you had a 76% chance of finding a prime. So it's not particularly unusual that you wouldn't find a prime. Here is what is truly remarkable: Carlos's n=53K56K range contained NO primes for MORE k's! If it were for the same # of k's, he would expect 4.3 primes with a 98.6% chance of finding at least one prime. But it was actually higher for both stats since he had more k's than the calculations that I am using. Primes are very strange! Gary 

20080808, 17:20  #65 
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Taking 63K64K, will start on it when the NPLB rally is over.

20080808, 20:07  #66 
Jan 2005
479 Posts 

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