mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 398
Search took 0.06 seconds.
Search: Posts Made By: bur
Forum: Proth Prime Search 2021-10-11, 07:14
Replies: 5
Views: 476
Posted By bur
Interesting, I didn't know about Pierpont primes....

Interesting, I didn't know about Pierpont primes. Did you check for ((x)G))F divisibility? The chances are slim, but you never know...
Forum: Msieve 2021-10-08, 15:46
Replies: 185
Views: 52,658
Posted By bur
This c163 poly is close to the record-holder with...

This c163 poly is close to the record-holder with cownoise score of 1.081e-12 vs. 1.096e-12. Maybe it can be spun towards a new record? I tried EdH's spin script but it changed nothing.


n:...
Forum: CADO-NFS 2021-10-07, 16:52
Replies: 70
Views: 13,162
Posted By bur
Total - Uniques - Duplicates - Ratio 10-100M...

Total - Uniques - Duplicates - Ratio

10-100M
214,512,998 - 153,030,781 - 61,482,217 - 71,34%

11-105M
219,448,738 - 158,516,513 - 60,932,225 - 72,23%

12-110M
224,369,197 - 163,859,554 -...
Forum: Aliquot Sequences 2021-10-06, 06:26
Replies: 133
Views: 45,376
Posted By bur
I think it would be a very interesting number...

I think it would be a very interesting number since 276 is both the smallest open-ended aliquot-sequence which also makes it part of the Lehmer 5. But since I don't have any means to sieve this it...
Forum: Aliquot Sequences 2021-10-02, 16:42
Replies: 3,136
Views: 255,392
Posted By bur
Nice, let's hope the 7 will vanish....

Nice, let's hope the 7 will vanish....
Forum: CADO-NFS 2021-09-23, 18:19
Replies: 70
Views: 13,162
Posted By bur
I did the matrix building to see how many uniques...

I did the matrix building to see how many uniques were required, but yes, it's faster to just do that once and otherwise only use remdups. So I'll do just that? Or is there some merit in using msieve...
Forum: CADO-NFS 2021-09-23, 16:00
Replies: 70
Views: 13,162
Posted By bur
I did some tests on a C167 to see the differences...

I did some tests on a C167 to see the differences between various q-min values.

I sieved in the region q0=10M to q1=108M with the parameters from curtis' file. The I concatenated the sieve files...
Forum: And now for something completely different 2021-09-22, 19:06
Replies: 13
Views: 603
Posted By bur
The length has been corrected, now I can sleep...

The length has been corrected, now I can sleep peacefully.


Thanks for the explanations about the necessity of an odd number of digits. It's always fascinating how much can be deduced about...
Forum: Aliquot Sequences 2021-09-21, 17:27
Replies: 3,136
Views: 255,392
Posted By bur
Interesting, is it valid for most sizes of...

Interesting, is it valid for most sizes of numbers? That'd be quite helpful.
Forum: Aliquot Sequences 2021-09-20, 09:43
Replies: 3,136
Views: 255,392
Posted By bur
Good to know. Why is the duplicate...

Good to know.

Why is the duplicate percentage so low, is that after an inital removal already?
Forum: CADO-NFS 2021-09-20, 09:04
Replies: 70
Views: 13,162
Posted By bur
Thanks, that's very helpful. I also found that...

Thanks, that's very helpful. I also found that the commandline is saved to the sieving file.
Forum: CADO-NFS 2021-09-19, 16:08
Replies: 70
Views: 13,162
Posted By bur
I'm currently at mksol for the c167 (took 197M...

I'm currently at mksol for the c167 (took 197M relations). I started sieving at q = 17M. Since you mentioned earlier that a value of 17M was likely too large and the unique percentage is high (76%) I...
Forum: And now for something completely different 2021-09-17, 17:06
Replies: 13
Views: 603
Posted By bur
Palindrome prime number of digits is always odd (except 11, and this is true in any base)

This newly discovered largest known Palindrome prime was reported by Propper & Batalov:

10^1234567 - 20342924302 · 10^617278 - 1 (https://primes.utm.edu/primes/page.php?id=132715)

It's shown as...
Forum: Aliquot Sequences 2021-09-16, 15:56
Replies: 3,136
Views: 255,392
Posted By bur
You're right, even with a summary. I must have...

You're right, even with a summary. I must have been blind. Thanks again and sorry for the off-topic.
Forum: Aliquot Sequences 2021-09-16, 14:42
Replies: 3,136
Views: 255,392
Posted By bur
Thanks, to find the number of uniques I just did...

Thanks, to find the number of uniques I just did a wc -l on the lines not starting with #, does that yield the correct result? Is there a faster way, does remdup output the number somewhere?
Forum: Aliquot Sequences 2021-09-14, 16:56
Replies: 3,136
Views: 255,392
Posted By bur
How can the percentage of uniques be found during...

How can the percentage of uniques be found during sieving? By doing a manual filtering step on the relations?


Impressive progress anyway, about the same timeframe I need for a C167...
Forum: YAFU 2021-09-14, 12:31
Replies: 291
Views: 20,266
Posted By bur
Thanks!

Thanks!
Forum: YAFU 2021-09-13, 13:06
Replies: 291
Views: 20,266
Posted By bur
edit: I saw this was reported earlier and should...

edit: I saw this was reported earlier and should be fixed?

I pulled the newest version and did a make clean and make NFS=1 USE_SSE41=1 USE_AVX2=1 and building quits with the following error:


...
Forum: CADO-NFS 2021-09-08, 06:04
Replies: 70
Views: 13,162
Posted By bur
In an older post I saw why that initial c163...

In an older post I saw why that initial c163 sieved so fast:

skew 8385289.96, size 8.965e-16, alpha -7.745, combined = 1.077e-12 rroots = 5
The record is 1.096e-12.
Forum: CADO-NFS 2021-09-07, 12:06
Replies: 70
Views: 13,162
Posted By bur
Ok, good to know. Does it apply to sieving as...

Ok, good to know. Does it apply to sieving as well? I never observed non-utilized cores during sieving.


I started sieving a c167 from 1992:1644 on Sunday using a polynomial I searched previously...
Forum: Aliquot Sequences 2021-09-04, 04:57
Replies: 524
Views: 65,202
Posted By bur
Nothing interesting found: 10e6-11e6,...

Nothing interesting found:



10e6-11e6, incr=420, P=5M, nq=5^6
Best poly: 3.380e-15
Took 590000 thread-s
Forum: Aliquot Sequences 2021-09-03, 17:39
Replies: 524
Views: 65,202
Posted By bur
Thanks, that's very helpful again. So we are not...

Thanks, that's very helpful again. So we are not looking directly at the prime factors of a and b to create the squares but at the ideals?
Forum: Aliquot Sequences 2021-09-02, 18:18
Replies: 524
Views: 65,202
Posted By bur
Slightly off-topic, but I'll take the chance to...

Slightly off-topic, but I'll take the chance to ask: what are singletons and ideals?


In another thread you explained it as "...ideals are essentially the variables that our equations are in." Is...
Forum: Aliquot Sequences 2021-09-02, 17:54
Replies: 524
Views: 65,202
Posted By bur
Then I'll use P=5M as well, seems like a good...

Then I'll use P=5M as well, seems like a good middleground between 3M(c195) and 10M(c220). CADO documentation says a large P generally results in better polys, but fewer. Ambiguous as most parameters...
Forum: CADO-NFS 2021-09-02, 17:30
Replies: 70
Views: 13,162
Posted By bur
I didn't know that. For a 10 core should I use 5...

I didn't know that. For a 10 core should I use 5 clients à 4 threads or 10 à 2? And does sieving also benefit from hyperthreading? I didn't notice that problem during sieving.
Showing results 1 to 25 of 398

 
All times are UTC. The time now is 22:12.


Sun Oct 17 22:12:34 UTC 2021 up 86 days, 16:41, 0 users, load averages: 2.33, 2.66, 2.65

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.