20091021, 10:49  #573 
Feb 2007
211 Posts 
2769*2^4982091 Another one Woot !!!! woot!!!
http://primes.utm.edu/primes/page.php?id=90553 
20091022, 07:17  #574 
Jan 2005
Sydney, Australia
5·67 Posts 
2781*2^4987781 is prime

20091022, 08:58  #575 
May 2007
Kansas; USA
3^{4}·5^{3} Posts 
With this prime, we've now found 66 primes for n=480K500K compared with 65 primes for n=460K480K and 60 primes for n=440K460K on this drive. There's also one more new one yet to be reported plus an already known one yet to go so there will be at least 68 primes for n=480K500K.
I think we've got it all wrong. The primes get more numerous as you search higher! 
20091022, 23:58  #576  
Feb 2007
11010011_{2} Posts 
Quote:
2253*2^4984431 http://primes.utm.edu/primes/page.php?id=90577 

20091024, 08:12  #577 
May 2007
Kansas; USA
10011110001101_{2} Posts 
2373*2^4995481 is prime

20091024, 17:39  #578 
Feb 2007
211 Posts 
2753*2^4993861 is prime.
http://primes.utm.edu/primes/page.php?id=90603 
20091025, 17:09  #579 
May 2007
Kansas; USA
10011110001101_{2} Posts 
2089*2^4999511 is confirmed prime

20091025, 18:49  #580  
Just call me Henry
"David"
Sep 2007
Cambridge (GMT)
1011000011100_{2} Posts 
Quote:
edit: There were 41 primes for the range n=425K440K in this drive. This is 3/4 of the size of the higher ranges. Based on that there should be about 54.67 primes in n=420K440K which is again lower than higher ranges. I reckon when we test n=420K425K we will find less than 13.67 primes. Last fiddled with by henryzz on 20091025 at 19:01 

20091026, 07:44  #581 
May 2007
Kansas; USA
10125_{10} Posts 
Yes, the total was 70 primes for n=480K500K. Very remarkable. Of course there is no predicatibility for n=420K425K but it's fun to think that we can based on this inverse pattern of increasing primes. In the mean time, here's the 1st prime for k=20003000/n>500K:
2949*2^5004811 is confirmed prime 
20091026, 09:16  #582 
Jan 2005
Sydney, Australia
5·67 Posts 
2967*2^5005301 is prime

20091030, 12:15  #583 
May 2007
Kansas; USA
3^{4}·5^{3} Posts 
2495*2^5016361 is prime
2657*2^5021901 is prime 2465*2^5028321 is prime 2077*2^5029771 is prime Last fiddled with by gd_barnes on 20091104 at 03:40 Reason: add primes 
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