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Search: Posts Made By: D. B. Staple
Forum: Computer Science & Computational Number Theory 2015-11-25, 13:40
Replies: 50
Views: 26,524
Posted By D. B. Staple
Nice work, David! I'm glad to hear it.

Nice work, David! I'm glad to hear it.
Forum: Factoring 2015-09-10, 19:30
Replies: 149
Views: 22,605
Posted By D. B. Staple
Yes, I was aware of that possibility when I was...

Yes, I was aware of that possibility when I was running the calculations, but decided to just use GNFS, as I was mostly interested in learning about GNFS, how to use CADO effectively, etc. However,...
Forum: Factoring 2015-09-10, 14:12
Replies: 149
Views: 22,605
Posted By D. B. Staple
These factorizations may be of interest to you: ...

These factorizations may be of interest to you:

8269^64 + 1 = 2 * 918268289 * 1044636673 * 27246569091713 * 330833653243776747964260771073 * 561890619505467417673578437249 *...
Forum: Computer Science & Computational Number Theory 2015-09-08, 12:27
Replies: 34
Views: 28,526
Posted By D. B. Staple
Nice work, Kim!

Nice work, Kim!
Forum: Computer Science & Computational Number Theory 2015-03-10, 19:10
Replies: 50
Views: 26,524
Posted By D. B. Staple
Thanks! Good catch. Yes, you are both right, I...

Thanks! Good catch. Yes, you are both right, I am colloquial to the point of incorrect in those two places.
Forum: Computer Science & Computational Number Theory 2015-03-09, 13:29
Replies: 50
Views: 26,524
Posted By D. B. Staple
Thanks -- I'll fix each of these points in the...

Thanks -- I'll fix each of these points in the next version. (Yes, a node is a shared-memory computer. Multiple nodes together make a cluster. I typically use 16-core nodes with 64 or 128 GB of...
Forum: Computer Science & Computational Number Theory 2015-03-09, 02:17
Replies: 50
Views: 26,524
Posted By D. B. Staple
It's true! Thank you for noticing. I actually...

It's true! Thank you for noticing. I actually just got the notice myself, so you are exceptionally fast. If anyone finds any typos, omissions, or errors, please let me know. Again, I am really...
Forum: Computer Science & Computational Number Theory 2014-12-29, 06:00
Replies: 50
Views: 26,524
Posted By D. B. Staple
Yes, I will definitely post back here when I have...

Yes, I will definitely post back here when I have more to share.
Forum: Computer Science & Computational Number Theory 2014-12-29, 02:23
Replies: 50
Views: 26,524
Posted By D. B. Staple
The double-check for π(286) completed; the result...

The double-check for π(286) completed; the result was consistent with the value I posted on Dec. 17.

Regarding timing and resource usage, I am going to release that information when I write up...
Forum: Computer Science & Computational Number Theory 2014-12-18, 01:14
Replies: 50
Views: 26,524
Posted By D. B. Staple
I have calculated one more power of two: π(286)...

I have calculated one more power of two:
π(286) = 1320486952377516565496055

The double checks for π(283) and π(285) have now finished and agree with my previously reported values. The...
Forum: Msieve 2014-12-12, 01:52
Replies: 24
Views: 9,393
Posted By D. B. Staple
This is probably not necessary. I selected that...

This is probably not necessary. I selected that because I was following as closely as possible to the instructions on your website, when I was trying to isolate the issue.


No, thanks. I...
Forum: Computer Science & Computational Number Theory 2014-12-11, 13:36
Replies: 50
Views: 26,524
Posted By D. B. Staple
Honestly, I remember learning that it is...

Honestly, I remember learning that it is relatively easy to check the parity of π(x), however, I somehow didn't think of this recently. I first worked on π(x) calculations in 2007, then gave up on...
Forum: Msieve 2014-12-11, 02:49
Replies: 24
Views: 9,393
Posted By D. B. Staple
For reference, here are build instructions. ...

For reference, here are build instructions. Starting from a fresh install of Ubuntu Server 14.04.1 LTS 64-bit, the following will get you up and running with GGNFS (GitHub commit 3490572ca8, Apr....
Forum: Msieve 2014-12-11, 01:12
Replies: 24
Views: 9,393
Posted By D. B. Staple
OK, the issue was with GGNFS. The version that...

OK, the issue was with GGNFS. The version that you pointed to on GitHub (https://github.com/radii/ggnfs) contains bug fixes and updates that are not in the trunk release on SourceForge...
Forum: Msieve 2014-12-10, 22:41
Replies: 24
Views: 9,393
Posted By D. B. Staple
Thank you very much. I am trying to reproduce...

Thank you very much. I am trying to reproduce your work now. I'll also try to isolate the issue with my original instructions. Two questions: Firstly, what version of Python are you using? Secondly,...
Forum: Computer Science & Computational Number Theory 2014-12-10, 14:59
Replies: 50
Views: 26,524
Posted By D. B. Staple
Also, ldesnogu, you were right on the money: I...

Also, ldesnogu, you were right on the money: I was happy to have π(281) on hand and the others in the works, in case releasing π(1026) started some kind of arms race with one or multiple of Franke,...
Forum: Computer Science & Computational Number Theory 2014-12-10, 14:33
Replies: 50
Views: 26,524
Posted By D. B. Staple
Several people have commented on the small...

Several people have commented on the small stature of 281 as compared to 1026.

The reason I hadn't calculated larger powers of two was priority. If I wanted to simultaneously release π(1026),...
Forum: Msieve 2014-12-09, 16:32
Replies: 24
Views: 9,393
Posted By D. B. Staple
That doesn't look useless at all. In fact, it...

That doesn't look useless at all. In fact, it looks very similar to what I've been doing. Can I ask which versions of GGNFS, Msieve, and factmseive.py you tested this with?
Forum: Msieve 2014-12-08, 22:15
Replies: 24
Views: 9,393
Posted By D. B. Staple
As far as I can tell, yes. Without that package,...

As far as I can tell, yes. Without that package, Msieve will not compile, and GCC will complain that gmp.h is missing. Once that package is installed, Msieve compiles. I can also say that...
Forum: Msieve 2014-12-08, 19:33
Replies: 24
Views: 9,393
Posted By D. B. Staple
Build Instructions for Ubuntu 14.04

I'm trying to write a script that will take an empty directory on Ubuntu 14.04 and perform all the steps needed to get GGNFS + Msieve + factmsieve.py playing nicely together. Here is what I have:
...
Forum: Computer Science & Computational Number Theory 2014-12-06, 00:07
Replies: 50
Views: 26,524
Posted By D. B. Staple
I am happy to announce an additional power of...

I am happy to announce an additional power of two:
pi(2^82) = 86631124695994360074872
Forum: Computer Science & Computational Number Theory 2014-12-04, 02:13
Replies: 50
Views: 26,524
Posted By D. B. Staple
Yes, I calculated pi(2^m) for all m<=81, and...

Yes, I calculated pi(2^m) for all m<=81, and pi(10^n) for all n<=26. For pi(2^78), pi(2^79) and pi(2^80), I found the same values as were previously calculated by J. Franke, T. Kleinjung, J. Büthe...
Forum: Computer Science & Computational Number Theory 2014-12-03, 14:18
Replies: 50
Views: 26,524
Posted By D. B. Staple
Thank you! I will eventually release technical...

Thank you! I will eventually release technical details, including a scaling analysis. For the moment, though, I am going to sit on that information, lest my competitors *ahem*...
Forum: Computer Science & Computational Number Theory 2014-12-02, 20:12
Replies: 50
Views: 26,524
Posted By D. B. Staple
Prime counting function records

I am pleased to announce the following computations of the prime counting function:
pi(10^26) = 1699246750872437141327603
pi(2^81) = 43860397052947409356492

These values were computed using an...
Forum: Factoring 2011-06-22, 18:32
Replies: 24
Views: 3,843
Posted By D. B. Staple
I guess the fact of the matter is that the...

I guess the fact of the matter is that the software is using a combination of interpolation and guessing. So it would be better to improve that combination. I've factored 36 numbers in the 110-130...
Showing results 1 to 25 of 56

 
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