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Forum: Prime Gap Searches 2021-05-04, 06:32
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
Cool!

Cool!
Forum: Prime Gap Searches 2021-03-19, 08:47
Replies: 45
Views: 16,440
Posted By robert44444uk
Nice gap! It is really tough to find records...

Nice gap! It is really tough to find records <3000
Forum: Software 2021-03-15, 18:13
Replies: 13
Views: 1,035
Posted By robert44444uk
No one k was taken up as far as n=1e6, about 850k...

No one k was taken up as far as n=1e6, about 850k from memory was the highest. That k has more than 200 primes, and is the only known k with >200 primes.

Checking is quite slow for these k,...
Forum: Software 2021-03-13, 08:30
Replies: 13
Views: 1,035
Posted By robert44444uk
The search was discontinued because many of the...

The search was discontinued because many of the goals it set out to achieve were reached.

Yes it will rediscover K that provide very prime series. To get new results you need to scan a different...
Forum: Prime Gap Searches 2021-03-10, 11:58
Replies: 11
Views: 768
Posted By robert44444uk
You might want to work out what your speed of...

You might want to work out what your speed of checking is. How many billions of prime gaps per second is a reasonable measure.

At 1e9 prime gaps per second, you would move from 2^64 (=1.84467e19)...
Forum: Software 2021-03-04, 14:32
Replies: 13
Views: 1,035
Posted By robert44444uk
Nostalgia indeed! Here is (I think) a table...

Nostalgia indeed!

Here is (I think) a table of the most recent Riesel records at each level. First column is the cumulative number of primes, and the other columns represent the smallest n value...
Forum: Software 2021-03-04, 10:37
Replies: 13
Views: 1,035
Posted By robert44444uk
Hi masser, the software finds k that provide very...

Hi masser, the software finds k that provide very prime density. It does more than calculate Nash. It incorporates pfgw and produces output that looks like:


R 267710937687553 52 100/8531...
Forum: Software 2021-03-03, 18:28
Replies: 13
Views: 1,035
Posted By robert44444uk
Thank you for clarifying Dr S. Very prime...

Thank you for clarifying Dr S.

Very prime sequences arise from "very prime numbers" also been referred to on this site as a VPN. All VPNs are a multiple of k (an integer) and M(p) where M(p) is...
Forum: Software 2021-03-03, 13:59
Replies: 13
Views: 1,035
Posted By robert44444uk
Multithreading existing code

I am wondering if there are c programmers out there who could take a great piece of prime finding software and make it multi thread.

The software helps to find constant k such that the power...
Forum: Prime Gap Searches 2021-02-20, 14:21
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
No more 115694! (115694, '16313 *...

No more 115694!

(115694, '16313 * 7547#/46410 -104270', 'Verified! (61.3s)')
Forum: Prime Gap Searches 2021-02-09, 14:38
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
Cool, that is a beaut!

Cool, that is a beaut!
Forum: Prime Gap Searches 2021-02-07, 06:38
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
"No known gap larger with smaller start" ...

"No known gap larger with smaller start"

https://primegap-list-project.github.io/lists/prime-gaps-high-watermarks/

I'm not sure this list is correct - how can we have the middle of these -...
Forum: Prime Gap Searches 2021-02-07, 06:30
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
Nice!

Nice!
Forum: Prime Gap Searches 2021-02-04, 12:17
Replies: 46
Views: 5,166
Posted By robert44444uk
Hi Seth, a couple of questions Do the...

Hi Seth, a couple of questions


Do the --prp-top-percent and --min-merit handles still work?
Will the program pick up automatically after either ctrl c is pressed, or the power outage, or...
Forum: Prime Gap Searches 2021-02-03, 16:59
Replies: 45
Views: 16,440
Posted By robert44444uk
Here is a useful gap! 213240, C?P, 32.2418,...

Here is a useful gap!

213240, C?P, 32.2418, RobSmith, 2021-02-03, 2873, 586399*6703#/46410-131770
Forum: Prime Gap Searches 2020-12-15, 17:19
Replies: 46
Views: 5,166
Posted By robert44444uk
Hi Seth Hmm, something went wrong today - I...

Hi Seth

Hmm, something went wrong today - I seem to have lost a key file. Can you tell me what I must do to repair or start afresh?

gap stats went well, as did the combined sieve

...
Forum: Prime Gap Searches 2020-12-13, 23:06
Replies: 46
Views: 5,166
Posted By robert44444uk
OpenPFGW has a stop on success capability, I seem...

OpenPFGW has a stop on success capability, I seem to remember

https://sourceforge.net/projects/openpfgw/

What command do I do to get openPFGW for Linux into my Ubuntu library?
Forum: Prime Gap Searches 2020-12-13, 12:34
Replies: 46
Views: 5,166
Posted By robert44444uk
Thanks Seth Installed on my big machine -...

Thanks Seth

Installed on my big machine - effortless this time.
The last few questions for today question:



$ ./gap_test.py --unknown-filename 907_53970_1_10000_s15000_l1000M.txt...
Forum: Prime Gap Searches 2020-12-13, 11:38
Replies: 46
Views: 5,166
Posted By robert44444uk
Trying to understand the input variables. In post...

Trying to understand the input variables. In post #1 you write



sieve to sieve m * P#/d for m from a to a+b up to limit

./combined_sieve --save-unknowns -p <P> -d <d> --mstart <a> --minc <b>...
Forum: Prime Gap Searches 2020-12-13, 10:57
Replies: 46
Views: 5,166
Posted By robert44444uk
Thanks Seth - I had actually figured that out in...

Thanks Seth - I had actually figured that out in the end. There were several more issues on the way after that but it was a question that I was running everything from scratch and I needed to run...
Forum: Prime Gap Searches 2020-12-11, 08:57
Replies: 46
Views: 5,166
Posted By robert44444uk
Well, that looks promising. So I can think if...

Well, that looks promising. So I can think if there is a Linux methodology to use Seth's program, then it should be possible to me to join in the fun.
Forum: Prime Gap Searches 2020-12-10, 18:06
Replies: 46
Views: 5,166
Posted By robert44444uk
Great f you can, Seth!

Great f you can, Seth!
Forum: Prime Gap Searches 2020-12-10, 11:59
Replies: 127
Views: 25,054
Posted By robert44444uk
Hi henryzz I think you are right, over the...

Hi henryzz

I think you are right, over the long run, deficient primorial offsets are not as efficient as defiicent primorials around the centre point, but they still provide a pretty sparse set of...
Forum: Prime Gap Searches 2020-12-10, 09:47
Replies: 46
Views: 5,166
Posted By robert44444uk
Hi Seth I don't know what software one needs...

Hi Seth

I don't know what software one needs to have, but searchers like me work in a Windows environment, or have the ability to emulate some other environments through a Windows shell.

Any...
Forum: Prime Gap Searches 2020-12-05, 10:24
Replies: 244
Sticky: Prime Gap News
Views: 50,412
Posted By robert44444uk
Love it :cool:

Love it :cool:
Showing results 1 to 25 of 1000

 
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