Doublecheck drive #1: k=3-1001 n=100K-260K

[gd_barnes]

k=27, 29, & 31 complete. No problems found. With 2 heavy-weights, even the zipped results and primes files totaled 330 KB so not attachable here. I'll Email them.

I verified the primes against Karsten's k<300 page but of course can't check Primesearch. The ranges for all 3 k's are n>260K at the Prothsearch site so nothing to report there.

In a few hours, sieving will be complete and I will begin the run of k=31 for n=260K-500K due to the problems on that k. ETA on one core is a little over 2 weeks. Then we can get rid of the question marks on the k<300 page. lol After that, it'll be back to the regular n=100K-260K double-checks here.


Gary

[gd_barnes]

k=31 double-check is now at n=370K...still going to n=500K. 4 primes confirmed since n=260K:

31*2^274115-1
31*2^306751-1
31*2^311389-1
31*2^315523-1


Karsten, you can reflect k=31 at n=370K now. All k<300 were double-checked to n=100K several years ago and we have now double-checked k=31 for n=100K-370K. Once I'm done, there will no longer be a gap.


Gary

[gd_barnes]

Originally Posted by gd_barnes

Chris,

I don't know if you are aware of this but you'll need to report your range completed to Wilfred Keller's page per post 48 in this thread.

It just so happens that the page only has k=33 as reported to n=250K. Since you searched it to n=260K, then it needs to be reported there.

There should be enough detailed instructions in post 48 for you to take care of it and it shouldn't take more than 5-10 mins. Let us know if there are any questions.

For my 3 k's, they are all already reported there past n=260K so I won't have to report any of them when I'm done.

Status: k=31 is nearing completion now and k=29 will start shortly. No problems found yet. For the next several months except during rallies, I'm going to keep one core running constantly on this effort.


Gary

Chris,

Have you taken care of this yet?


Thanks,
Gary

[Flatlander]

Originally Posted by gd_barnes

Chris,

Have you taken care of this yet?


Thanks,
Gary

Sorry yes, ages ago. And I had a nice thank you from him.

[gd_barnes]

Originally Posted by Flatlander

Sorry yes, ages ago. And I had a nice thank you from him.

Speaking of reporting ranges at Prothsearch for k<300, 3 days ago, I reported all k's and ranges k<300 that I had done in the past year to Mr. Keller. It was a multitude of them. I haven't checked to see if Mr. Keller has updated the site for them.

When I get all the results pulled together on a few more efforts here, I'll report some of our team efforts there, namely the 4th drive.

In an unusual move, I'll likely reserve k=181 next here for double-checking n=100K-260K. It's the only Riesel k at ProthSearch that has a range for n<200K not reported complete yet so I may as fill it in.

I'll keep 1 core on this effort 24x7 except during rallies for the foreseeable future.


Gary

[gd_barnes]

k=31 double-check is now at n=450K. Still going to n=500K non-stop on 1 core.

No problems found. The 2 primes in the low n>400K's were confirmed:

31*2^406105-1
31*2^421129-1


Gary

[Harvey563]

I have been rechecking my old range regarding 27 and 31 at Dr. Keller's request. For 27 I have checked from 175000 to 336000, and found 175852 and 282700, which was missed previously as far as I can tell.
For 31, I have checked from 300000 to 417000, and have confirmed the previously known 306751, 311389, 315523 and 406105.

I will be happy to continue with either or quit, since it appears my efforts are being at least somewhat duplicated.


Yours,

Steven Harvey

[gd_barnes]

Originally Posted by Harvey563

I have been rechecking my old range regarding 27 and 31 at Dr. Keller's request. For 27 I have checked from 175000 to 336000, and found 175852 and 282700, which was missed previously as far as I can tell.
For 31, I have checked from 300000 to 417000, and have confirmed the previously known 306751, 311389, 315523 and 406105.

I will be happy to continue with either or quit, since it appears my efforts are being at least somewhat duplicated.


Yours,

Steven Harvey

Steve,

Thank you very much for checking these out. Here is what we have done:

All k <= 33 for n=100K-260K. No missing primes were found!

Somebody already found n=175852 for k=27 per a top-5000 entry in 2003 here so that one is not missing.

We did not check beyond n=260K on any k so we did not find the prime at for k=27 at n=282700. It is our intent once all k<=1001 is double-checked to n=260K to conduct double-checks for n=260K to a limit to be determined at that time.

In addition to n=100K-260K for k=31, I will complete a double-check of it up to n=500K on Tuesday. I am currently at n=490K but have paused 2 days to run our rally. For n=260K-490K, we have confirmed that n=274115, 306751, 311389, 315523, 406105, and 421129 are prime.

I will let Wilfred Keller know when I have completed k=31 to n=500K so that he can remove the "?" mark from the officially searched range.

On k=27, we're not going higher with that one because we weren't aware of any missing primes on it. Please continue higher with it if you want to.

On k=31, you can feel free to continue but it would be what amounts to a triple-check to n=500K.

Karsten, please add a prime for k=27 at n=282700 to rieselprime.org.


Thanks!


Gary

[Harvey563]

I am taking k= 35



Steven Harvey

[gd_barnes]

Originally Posted by Harvey563

I am taking k= 35



Steven Harvey

Excellent! Good to have the help here Steve. Welcome to the effort.


Gary

[Flatlander]

Taking k=37.