20060926, 06:16  #1 
Apprentice Crank
Mar 2006
2·227 Posts 
100 primes
Congrats to pacionet, who has found the 100th prime!
572393475*2^1950001 
20060926, 12:35  #2 
Oct 2005
Italy
339_{10} Posts 
I am happy
let's go on this way ! 
20061211, 18:43  #3 
Apprentice Crank
Mar 2006
111000110_{2} Posts 
We're at 200 primes now
Last fiddled with by MooooMoo on 20061211 at 18:44 
20061211, 20:48  #4 
Quasi Admin Thing
May 2005
1701_{8} Posts 
Yeah! ! ! More than 7 bit primes, I'm just wondering if we shouldn't be capeable of hitting the 8th bit of primes, and maybe even more.... sighhh but if we have to find 4000 primes before hitting a twin, or even more, we will definently still have a long way to walk But we can do it of course we can, maybe even within next summer :) And what the ("beeeep") it gives our project plenty of time to sieve the new n to a huge depth
Regards! 
20061212, 11:24  #5 
Mar 2004
3·127 Posts 
At 50 Bit sieving depth (1126T) one can expect one twin every 2184 primes, at 52 Bit every 2100 prime.
Let's hope that we a re not too unlucky. 
20061212, 12:25  #6 
Nov 2004
UK
2·19 Posts 

20061212, 15:16  #7  
Quasi Admin Thing
May 2005
1111000001_{2} Posts 
Quote:
Regards! 

20061212, 16:03  #8  
"Sander"
Oct 2002
52.345322,5.52471
29×41 Posts 
Quote:
The sieving is looking for composites of both the +1 and 1 side. If a factor is found for either one, the number is removed from the list. So, the 1 number might well be prime, but that number isn't tested because the +1 number had a small factor. 

20061212, 17:10  #9  
Quasi Admin Thing
May 2005
961_{10} Posts 
Quote:


20061212, 17:20  #10 
Mar 2004
3·127 Posts 
Yes.
You are sieving for twins, therefore the number of twins remains constant, but not the number of normal primes. Example: When you sieve up to Sqrt(candidate), every remaining prime is also a twin. 
20061229, 22:05  #11 
Apprentice Crank
Mar 2006
1C6_{16} Posts 
300 primes now
Time to find the first 100 primes: more than 5 months Time to find the second 100 primes: about 2 and a half months Time to find the third 100 primes: less than 3 weeks :surprised 
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