20200209, 23:07  #320  
Random Account
Aug 2009
Not U. + S.A.
2^{2}·11·53 Posts 
k = 10009. Some lightweight results from the start:
Quote:


20200210, 03:51  #321 
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Aug 2009
Not U. + S.A.
2^{2}×11×53 Posts 
k = 10009, n = 192999
Hardware issue forced a stop. 
20200210, 07:22  #322 
May 2004
FRANCE
3·199 Posts 
k=138847

20200210, 07:34  #323 
"Curtis"
Feb 2005
Riverside, CA
5,479 Posts 

20200210, 16:43  #324  
Random Account
Aug 2009
Not U. + S.A.
2^{2}·11·53 Posts 
Another project running on my HP
6001*2^1147751 is prime! (34555 decimal digits) Quote:


20200210, 18:14  #325 
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Aug 2009
Not U. + S.A.
2^{2}·11·53 Posts 
6001*2^1404491 is prime! (42284 decimal digits)
6001*2^1565551 is prime! (47132 decimal digits) 
20200210, 23:55  #326 
Sep 2002
Database er0rr
2^{2}×3^{2}×7×17 Posts 
Given k, there is a threshold for which the k*2^n1 numbers left in a sieve is below, given that one has sieved up to some maximum value. Less in the sieve means it is "lighter" and as a result one expects fewer primes. An extreme of weight is a Riesel number which has no weight at all. Sometimes Nash weight is used for weight. Heavy means lots of numbers are left in the sieve and consequently one can expect more primes below a maximum n,
There is a program somewhere on this subforum which calculates weights, 
20200211, 14:13  #327  
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Aug 2009
Not U. + S.A.
91C_{16} Posts 
Quote:
I sieved a range of 50,000 possibilities on my HP overnight to 1e12. There were 1,100 remaining this morning. 6001*2^3155291 is prime! (94988 decimal digits) I hope someone is recording what folks are turning in here! 

20200211, 15:08  #328 
"Curtis"
Feb 2005
Riverside, CA
5,479 Posts 
You've chosen a k value (10009) from a range that nobody is tracking, noted that nobody is tracking it, and posted a bunch of primes of a size that aren't tracked by the top 5000.
If you expect a project to record your work, maybe pick a k value from a range that project cares about? The forum you're posting in, RPS, focuses on k < 300. For historical reasons, it also cares about multiples of 15 even if they're larger than 300 (the project was once called 15k). No Prime Left Behind focuses on 300 < k < 2000 (I think?). It should be obvious that you have an unlimited list of k values to choose from, but that doesn't mean someone cares about every possible k. I imagine the prime pages listings might include 6001, but you haven't reached a size that's all that interesting a day or three of work isn't exactly a massive effort. Last fiddled with by VBCurtis on 20200211 at 15:11 
20200211, 15:38  #329  
Random Account
Aug 2009
Not U. + S.A.
91C_{16} Posts 
Quote:
6001 on my HP did not seem to have much effort put into it, so I picked it up. It also does not appear in the top 5000 list. Make a suggestion and I will give it a go... 

20200212, 05:09  #330  
"Alexander"
Nov 2008
The Alamo City
2×419 Posts 
Quote:
I'll add that all k's between 10k and 100k have been fully tested below n~=1k, and k's between 10k and 15k have been tested to n=20k. The results from those can be found at https://www.rieselprime.de/Data/10e04a.txt. (After reading the next few posts after a page cutoff...) The old Riesel database is gradually being replaced with https://www.rieselprime.de/ziki/Riesel_prime_table, which is in a wiki format. https://www.mersenneforum.org/forumdisplay.php?f=89 would be a more appropriate place to post lowpriority data, or you could apply for a wiki account at https://www.mersenneforum.org/showthread.php?t=24141 to enter the data yourself. If you're looking for useful work, you may consider filling in gaps in the data for unreserved k's already in the old or new Riesel DB. Check with https://github.com/happy5214/rps/ to make sure you don't overlap with my work in that area. I also am working on the RPS 9th and 10th Drive k's below n=400k, all Woodall and near Woodall k's > 10k, and all k's between 10k and 15k with missing data, all on local PRPNet servers. Edit: https://www.mersenneforum.org/showthread.php?t=7213 has the Nash weight calculators alluded to by Paul. Last fiddled with by Happy5214 on 20200212 at 05:20 

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