20060501, 21:21  #100 
Nov 2004
California
2^{3}×3×71 Posts 
I've worked on k=144337 and finished it up to 1M (it's not currently listed
on the lowweight page but if you can add it, that would be great). The only primes found were: 144337 129 144337 237 144337 609 144337 1077 A sieve to 173G leaves 4.23 n's/1000. 
20060510, 06:51  #101 
Mar 2006
Germany
2×1,433 Posts 
status overview
i've reserved per email k=20141 and 27253 for me but not posted here.
i'm working on these and k=31511 too. k=20141 up to n=716000 > no prime found yet k=27253 up to n=660000 > n=272347 refound (Ballinger, 1998) and a new prime at n=370867 (L150, Nov.2005), mailed and listed on status page. k=31511 up to n=335000 > no prime found yet 
20060510, 12:47  #102 
May 2005
2×809 Posts 
I would like to reserve k=864316301 (it's not listed on 15k.org page).
There are only two primes for n<20000: 864316301*2^301 864316301*2^4021 Right now I am sieving this k for 20000<n<1000000, and at p=13.3*10^9 there are ~11400 candidates left. I plan to take it till p=100*10^9. 
20060510, 18:03  #103 
"Dave"
Sep 2005
UK
2·19·73 Posts 
When the page is next updated can you record that I am working on the following low weight k's.
k=48703 [at n=840000] Confirmed prime at n=109415 (Wilfred Keller, May 1998). k=49151 [at n=600000] Prime at n=97058. k=50171 [at n=1500000] Prime at n=138. Last fiddled with by amphoria on 20060510 at 18:04 
20060511, 20:04  #104  
"Curtis"
Feb 2005
Riverside, CA
11011_{8} Posts 
Quote:
To save yourself time, consider LLRing n=20,000 to n=300,000 after sieving to 100B, then sieving the rest to 1 trillion before LLRing the rest. You'll find the sieve removes candidates faster than LLR would for a number around 600,000. Curtis 

20060512, 10:54  #105 
May 2005
2·809 Posts 
VBCurtis  thanks for advice, I have used LLR till n~125000 and switched to NewPGen from p~66*10^9 till... today afternoon

20060620, 16:27  #106 
Feb 2003
1,907 Posts 
k=59493015971
k=59493015971 has reached n=4M now!
Taking a break... 
20060621, 07:56  #107 
Nov 2003
2×1,811 Posts 
n=4M !!!
Sounds like clucking bell! I know you are aiming high, but I had no idea it's that high. With a prime form such heights we could certainly move further up by score Can you give us some numbers, for example how many tests in the 34M range, and FFT lengths & exe times in the vicinity of 4M. Thanks! 
20060621, 08:58  #108 
Feb 2003
1,907 Posts 
Okay, here is some information:
The following FFT lengths had been in use so far: Code:
fftlen nmax  327680 3259650 393216 3884481 458752 4522811 On average there are "only" 88 LLR tests to be done per 1 million n range. The tests were done on a 1.7GHz P4, and in the vicinity of n=4M each test lasts about 110,000 secs (= 30.5 hours). 
20060712, 06:43  #109 
Mar 2006
Germany
2·1,433 Posts 
status
k n
20141 760.000 27253 757.000 31511 466.000 no new primes 
20060712, 08:52  #110 
Jun 2004
152_{8} Posts 
I reserved k=411793, it is tested until n=260k with 5000 tests left until 2M.
Found primes are: 411793 35 411793 683 411793 9419 411793 233819 
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