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Forum: Miscellaneous Math 2020-05-30, 20:21
Replies: 3
Views: 38
Posted By kar_bon
Why? Because... N = n2 - 4n - 5 =...

Why? Because...


N = n2 - 4n - 5 = (n-5)*(n+1), so your N/(n+1) = n-5.

So your composite/prime generator f(n) = n-5.
Forum: And now for something completely different 2020-05-30, 17:36
Replies: 248
Views: 20,873
Posted By kar_bon
see here: All data are shown here...

see here:




All data are shown here ('https://www.rieselprime.de/ziki/Carol-Kynea_prime'), the current data table is here ('https://www.rieselprime.de/ziki/Carol-Kynea_table').



Not...
Forum: And now for something completely different 2020-05-29, 12:12
Replies: 248
Views: 20,873
Posted By kar_bon
Status

CK290 at n=157k
CK362 still at n=139k
and cointinuing.

Make it official, reserving bases with no primes on Carol side:
CK688 at n=64k
CK968 at n=69k
CK1286 at n=59k
CK1346 at n=57k
Forum: Prime Wiki 2020-05-29, 10:34
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
I've included templates for Proth prime base b...

I've included templates for Proth prime base b ('https://www.rieselprime.de/ziki/Template:Gen_Proth_prime') (example here ('https://www.rieselprime.de/ziki/Gen_Proth_prime_5_6436'), smallest open...
Forum: Wagstaff PRP Search 2020-05-27, 00:52
Replies: 370
Views: 28,765
Posted By kar_bon
Or like this: p k 167747 4302619329240 ...

Or like this:

p k
167747 4302619329240

with factor = 2kp+1 of exponent p.
Forum: Prime Wiki 2020-05-25, 21:25
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
Again the sieve file: I've changed the...

Again the sieve file:
I've changed the handling, when creating a new k-value

- new k-value for Riesel prime created (not saved yet, only "Show preview") with RSieve set (like "RSieve=y")
- there...
Forum: Prime Wiki 2020-05-25, 20:07
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
RCount will become the value which will be taken...

RCount will become the value which will be taken when a k-value is shown in any overview table. The automated counting is only done in the template of the k-value page to be sure taking the correct...
Forum: Conjectures 'R Us 2020-05-25, 11:30
Replies: 107
Views: 11,418
Posted By kar_bon
4*303^198357-1...

4*303^198357-1 ('https://primes.utm.edu/primes/page.php?id=130922') is prime, 492,213 digits
Forum: Prime Wiki 2020-05-24, 21:06
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
I'm currently working on trying to speed up the...

I'm currently working on trying to speed up the generating of the prime tables for Riesel primes.

So I decided to extend a new parameter "RCount" to the Riesel prime template...
Forum: No Prime Left Behind 2020-05-19, 15:53
Replies: 249
Sticky: News
Views: 37,553
Posted By kar_bon
The range 600<k<800 is in the Wiki now. Data...

The range 600<k<800 is in the Wiki now.

Data like the other ranges.

Next: 800<k<1002
Forum: And now for something completely different 2020-05-17, 10:11
Replies: 18
Views: 373
Posted By kar_bon
srfile "-w" option sorts by n! When running...

srfile "-w" option sorts by n!
When running pfgw also use an expression like "{number_primes,$a,1}" in the header, see the documentation there.
Forum: Conjectures 'R Us 2020-05-17, 10:00
Replies: 4
Views: 158
Posted By kar_bon
other conjectures

For the problem 49 there's also an overview here ('https://www.rieselprime.de/Related/RieselTwinSG.htm').
I've updated up to k=500 but this should be done later in the Wiki, because the current...
Forum: Prime Wiki 2020-05-15, 07:54
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
The 'problem' with RPS Drive 9 &10 is they...

The 'problem' with RPS Drive 9 &10 is they started searching for n>400k, so the given max n-value is not correct in the Wiki for all those k-values yet.

In the bgeinning I decided not to include a...
Forum: Prime Wiki 2020-05-14, 08:00
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
No, it was Riesel k=25...

No, it was Riesel k=25 ('https://www.rieselprime.de/ziki/Riesel_prime_25') (see here ('https://www.mersenneforum.org/showpost.php?p=537956&postcount=1932')).
Borys found his first prime of this...
Forum: Prime Wiki 2020-05-13, 20:28
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
Riesel type primes are not listed separately in...

Riesel type primes are not listed separately in the Top20, but Proth primes do.

To get into the Top5000 with a Riesel prime, the n-value has currently be >~1.5 M (a higher k-value makes only small...
Forum: Prime Wiki 2020-05-12, 23:48
Replies: 163
Sticky: Prime-Wiki
Views: 11,086
Posted By kar_bon
So where do you see a problem here? Sure...

So where do you see a problem here?

Sure every logged in user can edit any page, but as admin I have to mark as checked every edit, so any 'spam' will be spotted.

Any edit can be watched in the...
Forum: No Prime Left Behind 2020-05-07, 18:09
Replies: 249
Sticky: News
Views: 37,553
Posted By kar_bon
The range 400<k<600 is online, too. The link to...

The range 400<k<600 is online, too. The link to the table is the same.

Included data like last time: Top5000, Drive 13, posts "Report top-5000 primes for all k<=1001" for this k-range

Next...
Forum: Conjectures 'R Us 2020-05-05, 07:14
Replies: 107
Views: 11,418
Posted By kar_bon
8*97^192335-1 is prime (382127 digits) 8*97^n-1...

8*97^192335-1 is prime (382127 digits)
8*97^n-1 tested for 100000<n<200000
Forum: Sierpinski/Riesel Base 5 2020-05-04, 21:45
Replies: 20
Views: 12,933
Posted By kar_bon
Seems this was not reported here yet: ...

Seems this was not reported here yet:

118568 * 5^3112069+1 ('https://primes.utm.edu/primes/page.php?id=130869') is prime, found on 2020-05-01
Forum: No Prime Left Behind 2020-05-02, 19:12
Replies: 249
Sticky: News
Views: 37,553
Posted By kar_bon
I've inserted many history data for all 300<k<400...

I've inserted many history data for all 300<k<400 in the Wiki. The overview table ('https://www.rieselprime.de/ziki/Riesel_k%3D300-2000') shows all current primes found and reservations with n-ranges...
Forum: Conjectures 'R Us 2020-04-27, 15:18
Replies: 3,668
Views: 212,288
Posted By kar_bon
9*990^23031-1 was found by Gary on 2019-06-07,...

9*990^23031-1 was found by Gary on 2019-06-07, see here ('https://www.mersenneforum.org/showpost.php?p=518762&postcount=93').
k*b^n-1 was tested there for k<=12, b<=1030 and n<=25k for a different...
Forum: Riesel Prime Search 2020-04-25, 02:35
Replies: 543
Views: 37,775
Posted By kar_bon
If needed I've made the 1000 files for every 1000...

If needed I've made the 1000 files for every 1000 n-range from n=2M to 3M with 1008910 candidates all over in standard LLR format (header, sorted by n-value with all 21 k-values) from the latest...
Forum: No Prime Left Behind 2020-04-24, 07:31
Replies: 688
Views: 42,146
Posted By kar_bon
I've reanimated my k=1471 search at n=1.71M and...

I've reanimated my k=1471 search at n=1.71M and found this for now:

1471*2^1772755-1 ('https://primes.utm.edu/primes/page.php?id=130853') is prime! (533656 decimal digits)
Continuing.
Forum: Prime Wiki 2020-04-24, 07:27
Replies: 3
Views: 355
Posted By kar_bon
The link is under the distributed computing...

The link is under the distributed computing projects (version of old MersenneWiki) as "http://www.myjavaserver.com/~primesearch/" but there is only the start page, no data like here...
Forum: Prime Wiki 2020-04-23, 12:18
Replies: 3
Views: 355
Posted By kar_bon
Riesel primes for 300<k<1000

This thread is for all Riesel primes k*2^n-1 with k-values from 300 to 1000.

The old PrimeSearch page maintained by Michael Hartley was the project before NPLB proceeded this range of the search...
Showing results 1 to 25 of 1000

 
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