Mark,
I mailed Dr Keller using your real name as I found/knew it from before. What I wanted to say is that from [URL=http://www.15k.org/riesellist.htm]our stats page[/URL] it's not easy to find them, specially if there are no reported primes, just a range completed, like k=63 and k=65 now.

I just added some of the names of people working on the project.
Since some are doing the sieving and some are doing part of the testing, it's not an easy job to keep track of who found what! And now we have LLRnet...
I don't think the top5000 list keeps in file old numbers and names. I'll give you credit for whatever work you do in the projet and let the top5000 list give you credits for finding large primes. I couldn't find some of the real names.
Kosmaj, Citrix, SB2, Justinsane, Cyrix. If you coud...


Joss

Here is a new prime for the top 5000
57*2^173585-1 is prime!

Joss

k=253 reserved
Im planning to take it little higher.

Citrix
:cool: :cool: :cool:

Results for k=193.
 

Hi all,

I have finished testing k=193 to n=200000:

k=193: n=3, 15, 27, 63, 87, 135, 543, 1383, 1455, 7767, 18543, 22143, 40967, 198719

regards,
masser

Just wondering, why did we choose k_max as 300 and not 512 or 128 or some other number. What is so special about 300.

Also some of the larger k's are not good at producing primes. I think we should finish all the k's upto 200,000 and then look at the k's under 128 only after that.

What do you all think?

Citrix
:cool: :cool: :cool:

It was chosen arbitrarily, because it was continuing a previous search.
I thought that project was still active recently.
I agree that the range should be centered on function, or speed.

The creation of the "15k search" was based upon that earlier search.
The definition was carried over too, so that all k were included in the search.
Besides any k, can be divided by 15!

Gloom!
 

Ouch. Spent a few days doing 261 only to find that only listable prime had already been discovered, and only three weeks ago, by Gary Chaffey.

Anyway the whole list is:

261: 34, 43, 49, 114, 115, 178, 322, 411, 438, 454, 589, 598, 754, 801,
1173, 1546, 1699, 2155, 2994, 4038, 5439, 6442, 10699, 12274, 13314,
13911, 19309, 28675, 29658, 31173, 33606, 65763, 90861, 116706, 185823.

Regards

Robert Smith

[QUOTE=robert44444uk]Ouch. Spent a few days doing 261 only to find that only listable prime had already been discovered, and only three weeks ago, by Gary Chaffey.
[/QUOTE]

Don't worry, this happens all the time! But now, thanks to you, we know that all primes below 200,000 have been found.

Joss

K=253 complete upto 210K with no primes and I am stopping there.

Citrix
:cool: :cool: :cool:

k=77
 

k=77 done up to n=250000. New primes for n = 39016, 47972, 72008, 217956, 223512.

k=53 in progress, up to n=120000 no new primes.

Working also on k=7 (currently at n=675000) and k=13 (at n=450000).