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Forum: Programming 2022-01-17, 14:11
Replies: 8
Views: 135
Posted By henryzz
My concern is that one assignment is overwriting...

My concern is that one assignment is overwriting four array elements. Could assign (char) 0 or (char) 1 or '\0' or '\1' to assign one element without complicating things by using the ASCII values of...
Forum: Programming 2022-01-17, 10:52
Replies: 8
Views: 135
Posted By henryzz
Seems odd to me that you needed to do that. Is...

Seems odd to me that you needed to do that. Is this just masking another issue by making the memory allocation bigger?

edit: Could assigning ints to elements of a char array be causing issues? I...
Forum: Forum Feedback 2022-01-13, 20:46
Replies: 11
Views: 286
Posted By henryzz
Does this mean you could make attached pdfs open...

Does this mean you could make attached pdfs open in the browser?
Forum: Msieve 2022-01-04, 08:58
Replies: 4
Views: 212
Posted By henryzz
Msieve should do that itself pretty reliably.

Msieve should do that itself pretty reliably.
Forum: Astronomy 2022-01-04, 08:54
Replies: 83
Views: 5,947
Posted By henryzz
They probably suspected this already but couldn't...

They probably suspected this already but couldn't commit.
Forum: Msieve 2022-01-03, 17:46
Replies: 15
Views: 418
Posted By henryzz
On linux ctrl-z would have been a decent way of...

On linux ctrl-z would have been a decent way of pausing it. fg resumes it.
Forum: Factoring 2021-12-23, 11:05
Replies: 1,000
Views: 122,728
Posted By henryzz
Many of these numbers will have had further ecm...

Many of these numbers will have had further ecm as part of https://mersenneforum.org/showpost.php?p=579659&postcount=958
Also gpu ecm is no longer limited to a max of 2^1018.
Forum: NFS@Home 2021-12-16, 23:16
Replies: 1,898
Views: 167,487
Posted By henryzz
Unfortunately ryanp didn't specify how much ecm...

Unfortunately ryanp didn't specify how much ecm he did but some of the remaining numbers in https://mersenneforum.org/showpost.php?p=579659&postcount=958 are small enough. Judging by some of the...
Forum: Prime Gap Searches 2021-12-14, 12:50
Replies: 59
Views: 24,055
Posted By henryzz
Just submitted a gap I found a while back and...

Just submitted a gap I found a while back and never got around to submitting. This is by far my best gap. I think my first record 30 merit as I generally search for larger gaps with lower merit....
Forum: Factoring 2021-12-13, 12:31
Replies: 1
Views: 358
Posted By henryzz
This is explained in the end game section of...

This is explained in the end game section of http://www.lirmm.fr/~ochem/opn/ and also in https://maths-people.anu.edu.au/~brent/pd/rpb116.pdf


Some of the larger numbers are included because it...
Forum: Msieve 2021-12-10, 12:03
Replies: 2
Views: 4,989
Posted By henryzz
I have attached a version that should work. It...

I have attached a version that should work. It works on my new(to me) 1650 Super.
Forum: Factoring 2021-12-09, 07:46
Replies: 1,000
Views: 122,728
Posted By henryzz
Factored...

Factored 27395631932423126416280468114484772969719691^5-1 =...
Forum: Software 2021-12-07, 14:03
Replies: 174
Sticky: Prime95 30.7
Views: 18,142
Posted By henryzz
Prime95 doesn't output at every step. It runs...

Prime95 doesn't output at every step. It runs 100s of iterations per update. When you paused it will have written a save file wherever it was up to. This will be the point it resumed from. There is...
Forum: carpetpool 2021-12-06, 22:42
Replies: 1
Views: 274
Posted By henryzz
The reason k and b are kept small is that it...

The reason k and b are kept small is that it allows much smaller and faster FFTs.
Forum: Hardware 2021-12-02, 21:46
Replies: 175
Views: 37,564
Posted By henryzz
Can't help feeling that there is a lot of old...

Can't help feeling that there is a lot of old tech in there.
A53 (2012)
DDR3 (2007)
802.11g wifi (2003)
Bluetooth 4.0 (2010)
Forum: Factoring 2021-11-28, 04:43
Replies: 101
Views: 9,103
Posted By henryzz
May have discovered the issue. I think I need to...

May have discovered the issue. I think I need to update CGBN
edit: confirmed
Forum: Factoring 2021-11-27, 22:05
Replies: 101
Views: 9,103
Posted By henryzz
Just tried to upgrade my version of this as I was...

Just tried to upgrade my version of this as I was on a fairly old version and certain numbers were crashing.

Compiling has failed with the following error:

/bin/bash ./libtool --tag=CC...
Forum: Cunningham Tables 2021-11-23, 11:38
Replies: 323
Views: 48,496
Posted By henryzz
Is the plan to do this matrix on a CPU or to pass...

Is the plan to do this matrix on a CPU or to pass it off to a GPU? I get the impression frin https://mersenneforum.org/showthread.php?t=27042 that a GPU would do it far faster although it would need...
Forum: Hardware 2021-11-23, 11:35
Replies: 8
Views: 506
Posted By henryzz
Even with a form of AVX512 are 1st gen Phi cards...

Even with a form of AVX512 are 1st gen Phi cards worth worrying about now? Wouldn't a single modern cpu (Zen 3?) match it in efficiency?
Forum: Information & Answers 2021-11-15, 08:46
Replies: 19
Views: 2,185
Posted By henryzz
Didn't you have a form that could be proved for...

Didn't you have a form that could be proved for all of -1/+1/+5 that could be sieved using polysieve?
Forum: CADO-NFS 2021-11-12, 07:36
Replies: 23
Views: 1,505
Posted By henryzz
Do you have a spare power supply?

Do you have a spare power supply?
Forum: Cunningham Tables 2021-11-09, 23:33
Replies: 323
Views: 48,496
Posted By henryzz
That's weird. My system takes 185s with 3e7 and...

That's weird. My system takes 185s with 3e7 and 322s without bkthresh1

./las -poly 3_748plus.poly -q0 100000000 -A 30 -nq 20 -lim0 500000000 -lim1 300000000 -lpb0 33 -lpb1 34 -mfb0 66 -mfb1 98...
Forum: Cunningham Tables 2021-11-09, 14:52
Replies: 323
Views: 48,496
Posted By henryzz
Too high -bkthresh certainly will slow it down. I...

Too high -bkthresh certainly will slow it down. I think you want a fairly equal amount of work before and after the threshold. What values have you tried? Finding a good value may be difficult with...
Forum: Cunningham Tables 2021-11-09, 09:00
Replies: 323
Views: 48,496
Posted By henryzz
My experience is that you can save a fair bit of...

My experience is that you can save a fair bit of memory using -bkthresh1 without affecting speed significantly. I think I even saw a very small speedup with the right value.



Found my post...
Forum: Software 2021-11-01, 07:41
Replies: 32
Views: 2,013
Posted By henryzz
Yes Linux on a modern machine. Wine emulates a...

Yes Linux on a modern machine. Wine emulates a Windows environment for progrmas on Linux. While they do update it for modern programs it runs old programs very well as that is when it was developed....
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