20110726, 15:05  #276 
Jul 2011
3^{2}·13 Posts 
And what is the difference between the 258 and 257?
I'd like to reserve k=2889081195 which has a very high Nash weight (7000+) but it has not been worked on for ages and seems to be available. If so, I'll start sieving on it when I get the approval. 
20110726, 16:20  #277 
"Dave"
Sep 2005
UK
2·19·73 Posts 
We can't really give any sort of formal approval. However, this k has clearly not been worked on for a long time so go ahead and reserve it.

20110726, 17:29  #278 
Jul 2011
3^{2}·13 Posts 
OK. Well I will start sieving on it later tonight when I have a core freed up, no harm in doing that at least. I ordered a new computer which should be delivered one day next week. By then this k will be sieved pretty good and I'll give it to my new computer if there has been no further objections by then.

20110726, 17:47  #279 
Mar 2006
Germany
2,767 Posts 
See the file 'newpgenformats.txt' given with NewPGen.exe:
Code:
// Here are the NewPGen format's <sieve limit>:<mode character>:<chain len>:<base>:<mode bitmap as a decimal> Mode character: 'P' +1 'M' 1 (...) BitMap: 0x0001 k*2^n+1 k*n#+1 0x0002 k*2^n1 k*n#1 0x0004 k*b^(n+1)+1 2k*n#+1 0x0008 k*b^(n+1)1 2k*n#1 0x0010 k*b^(n1)+1 .5k*n#+1 0x0020 k*b^(n1)1 .5k*n#1 0x0040 Primorial 0x0080 3tuple and 4tuple (PLUS5  used in the triplet sieve.) 0x0100 Mode 'k' sieve (variable k's) 257 (dez) is 101 (hex) > "Mode 'k' sieve (variable k's)" for "k*2^n+1". 
20110730, 19:18  #280 
Jul 2011
1110101_{2} Posts 
My new computer arrived this morning, ahead of schedule, what a nice surprise.
An even better surprise: In less than 6 hours of use, it has found a top 5000 prime! I am happy to report my first top5000 prime should come in around #2209: (11235813 * (2^775082))  1 is prime! 
20110730, 19:28  #281 
"Curtis"
Feb 2005
Riverside, CA
2×2,003 Posts 
SaneMur
Congratulations! Way to break in your new machine. A little beginner's luck mixed with a lot of enthusiasm it's fun to see someone find their first. Note we have a thread specifically dedicated to reporting primes now that you're finding top5000 primes, you should use that thread too. The threads are helpfully named; this current thread for reservations and occasional status updates, the prime reporting thread for just that. Curtis 
20110730, 19:33  #282  
Jul 2011
3^{2}·13 Posts 
Quote:
I'd also like to credit my 5.4 gigahertz computer! This thing is loud, heavy, and fun to watch (from the next room). This thread is called "Choose your own K and work on finding a top5000 prime!" so did I not post this in the correct place? I surely chose my own K and made it to the top 5000. 

20110917, 23:44  #283 
Jul 2011
3^{2}×13 Posts 
Well Hurricane Irene was not too kind to us. No real serious damage from falling trees or anything, but lots and lots of water. Fire company had to come and pump out the basement. One of my two computers is done for (fortunately not the new one).
Just restarted doing some primes so nothing to post in terms of updates. 
20141010, 15:55  #285 
Jun 2014
2^{3}×3×5 Posts 
would like to reserve k=314159

20150405, 19:29  #286 
"Curtis"
Feb 2005
Riverside, CA
2·2,003 Posts 
It has been quite a long time since I updated the k's I work on above 300:
k = 405 complete to 1.41M k = 443 complete to 2.31M k = 2115 complete to 1.33M k = 2145 complete to 1.36M k = 2175 complete to 1.27M 405 and 443 ran on ancient P4celerons until recently, so progress was very slow. 405 is now on a new i3 laptop, 443 on i7 desktop. The 2000's are in cooperation with sjtjung (Steven) and chaos13 (Kristine). 
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