mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.35 seconds.
Search: Posts Made By: henryzz
Forum: Cunningham Tables 2021-01-16, 00:17
Replies: 227
Views: 38,119
Posted By henryzz
You could fiddle with some values for -bkthresh1....

You could fiddle with some values for -bkthresh1. I have seen this reduce memory usage a lot in large memory cases. Reducing the memory too much can slow it down.
Forum: Msieve 2021-01-15, 17:12
Replies: 178
Views: 33,041
Posted By henryzz
I get a very good regression fit for the deg 5...

I get a very good regression fit for the deg 5 polys with:
[$]y = 0.0261e^{-0.146x}[/$]
R² = 0.9989
Forum: Factoring 2021-01-15, 12:24
Replies: 896
Views: 71,819
Posted By henryzz
Would jasonp be able to give any advice on how...

Would jasonp be able to give any advice on how to get past this blockage in the merge stage? I don't know whether he is reading this thread.
Forum: And now for something completely different 2021-01-12, 09:21
Replies: 2
Views: 192
Posted By henryzz
UTM Prime pages

Is anyone else getting certificate errors currently when accessing primes.utm.edu?
Forum: Software 2021-01-07, 22:21
Replies: 107
Views: 12,828
Posted By henryzz
What is holding srsieve2 back from reaching...

What is holding srsieve2 back from reaching sr2sieve's speed? How come the sieving % was only 23%? How does srsieve2cl compare when running on the cpu? I assume sr1sieve is still much faster than...
Forum: Prime Gap Searches 2021-01-07, 10:40
Replies: 124
Views: 17,579
Posted By henryzz
To some extent I think it makes sense to try and...

To some extent I think it makes sense to try and find one of the end points as that allows for an early skip(as that is done 90% of the time now). I wonder whether skips could be done faster/more...
Forum: Prime Gap Searches 2021-01-06, 20:47
Replies: 124
Views: 17,579
Posted By henryzz
What is the logic behind searching one side...

What is the logic behind searching one side before the other? Wouldn't it be better to test the denser central region first(assuming a primorial divisor) as it will probably be needed for a record?
Forum: Software 2021-01-04, 11:34
Replies: 508
Views: 52,740
Posted By henryzz
A compiler upgrade means that XP is no longer...

A compiler upgrade means that XP is no longer supported.
Forum: Prime Gap Searches 2021-01-02, 13:20
Replies: 214
Sticky: Prime Gap News
Views: 35,388
Posted By henryzz
What does that change? It is still worth...

What does that change? It is still worth double-checking the gaps to some extent. At least the endpoints. Why do some of the commits have failed checks? I assume these have been sorted,

I added a...
Forum: Prime Wiki 2021-01-02, 00:42
Replies: 199
Sticky: Prime-Wiki
Views: 32,293
Posted By henryzz
Brilliant that has fixed it for me. Thank...

Brilliant that has fixed it for me. Thank you:smile:
Forum: Prime Wiki 2021-01-01, 19:30
Replies: 199
Sticky: Prime-Wiki
Views: 32,293
Posted By henryzz
Ctrl-F5 didn't do anything for me. I have...

Ctrl-F5 didn't do anything for me.

I have attached an image of the errors/warnings I am getting.
Forum: Prime Wiki 2021-01-01, 00:34
Replies: 199
Sticky: Prime-Wiki
Views: 32,293
Posted By henryzz
Sorry, I should have done that before. I have...

Sorry, I should have done that before. I have seen this on multiple pcs so I assumed it was everyone. I have just tried other browsers and it works. The issue seems to be Chrome(both on windows and...
Forum: Prime Wiki 2020-12-31, 16:43
Replies: 199
Sticky: Prime-Wiki
Views: 32,293
Posted By henryzz
There are still many pages on the wiki that have...

There are still many pages on the wiki that have issues with tex formatting. Does this require each page to be edited or do the math tags just not work currently?

Two examples:...
Forum: Prime Gap Searches 2020-12-30, 20:55
Replies: 40
Views: 1,468
Posted By henryzz
I am having a few issues with predictions not...

I am having a few issues with predictions not matching reality.

Why is sum(prob_minmerit) being overestimated so much in this case? I am searching m * 9973#/208110 +- x. min_merit has been set...
Forum: Forum Feedback 2020-12-25, 01:10
Replies: 24
Views: 487
Posted By henryzz
You probably want to use IMAP rather than POP3....

You probably want to use IMAP rather than POP3. It leaves the emails on the server.
Forum: Factoring 2020-12-23, 11:29
Replies: 896
Views: 71,819
Posted By henryzz
If you look at the J that is used it often barely...

If you look at the J that is used it often barely increases for even A and sieve-adjust 0(I=65536; J=40287 seems to be one example). Sieve-adjust can help with that.

We could always do the smaller...
Forum: Factoring 2020-12-22, 20:23
Replies: 896
Views: 71,819
Posted By henryzz
There are a couple of options for las that may be...

There are a couple of options for las that may be useful to help yield:

-bkthresh1 1e8 turns on two-level bucket sieving which reduces memory usage a lot. There seems to be a speed/memory...
Forum: Hardware 2020-12-22, 16:58
Replies: 2
Views: 239
Posted By henryzz
Ampere Altra

This looks like a very impressive Arm CPU. 80 N1 cores at 3.3 GHz. Shame about the $4050 price tag. Maybe 32 cores at 1.7 GHz for $800 is better value.
...
Forum: Factoring 2020-12-19, 09:46
Replies: 896
Views: 71,819
Posted By henryzz
Would your max sieve size be I=16/A=31 or do your...

Would your max sieve size be I=16/A=31 or do your machines have the memory for more?
Forum: Factoring 2020-12-19, 01:01
Replies: 896
Views: 71,819
Posted By henryzz
Octics shouldn't be anywhere near as bad at 300...

Octics shouldn't be anywhere near as bad at 300 digits as 225. If your estimate is that 225 acts as 255 then I would imagine that 300 could act as low as 310. Test sieving is probably the way to...
Forum: Factoring 2020-12-19, 00:37
Replies: 896
Views: 71,819
Posted By henryzz
Unless I have made a mistake: ...

Unless I have made a mistake:

f(x)=x^8+x^7-7x^6-6x^5+15x^4+10x^3-10x^2-4x+1
g(x)=6115909044841454629x-6115909044841454629^2-1


What size have the previous reciprocal octics been?
Forum: Factoring 2020-12-18, 23:52
Replies: 896
Views: 71,819
Posted By henryzz
I would suggest checking that I am correct about...

I would suggest checking that I am correct about the octic before going too crazy on it. Maybe checking whether it would be sane to do as well. While it is large I am fairly sure octic is suboptimal....
Forum: Factoring 2020-12-18, 23:18
Replies: 896
Views: 71,819
Posted By henryzz
(103^173-1)/102...

(103^173-1)/102 (http://factordb.com/index.php?query=%28103%5E173-1%29%2F102) is 347 digits
(2666986681^37-1)/2666986680 (http://factordb.com/index.php?query=%282666986681%5E37-1%29%2F2666986680) is...
Forum: Prime Gap Searches 2020-12-16, 23:10
Replies: 40
Views: 1,468
Posted By henryzz
This code optimizes finding large gaps rather...

This code optimizes finding large gaps rather than aiming for continuous searching.
Forum: Prime Gap Searches 2020-12-16, 00:30
Replies: 40
Views: 1,468
Posted By henryzz
I will have a go at this over the Christmas...

I will have a go at this over the Christmas break(starts Friday for me) I have some git experience so I should be able to work that out. Part of my issue will be lack of python knowledge although...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 13:49.

Fri Jan 22 13:49:57 UTC 2021 up 50 days, 10:01, 0 users, load averages: 3.06, 2.95, 2.82

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.