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Search: Posts Made By: paulunderwood
Forum: GPU Computing 2020-07-15, 03:09
Replies: 292
Views: 17,136
Posted By paulunderwood
I would remove one or two of the original 3 and...

I would remove one or two of the original 3 and try the latest ones for stability and then get a Corsair HX 1200 :devil:

Mind, it is a big PSU dimensionally, but should have the connectors to run...
Forum: Forum Feedback 2020-07-15, 02:42
Replies: 4
Views: 72
Posted By paulunderwood
I banned eric1999, some say excessively, for ever...

I banned eric1999, some say excessively, for ever for what seemed to me a politically motivated racial slur. I guess if he promises to behave he is welcome back!
Forum: PrimeNet 2020-07-14, 19:49
Replies: 34
Views: 2,883
Posted By paulunderwood
What supporting evidence do you have to this...

What supporting evidence do you have to this conjecture?

Why do you believe MM127 is not prime?

In the sea of infinity what is there to stop a bigger double Mersenne prime existing?
Forum: Linux 2020-07-14, 06:32
Replies: 28
Views: 972
Posted By paulunderwood
Yes. I am loving rsync. It only backs up again...

Yes. I am loving rsync. It only backs up again the files that have changed (based on size and timestamp unless otherwise stated). And it deletes files from the backup set that have been deleted on...
Forum: PARI/GP 2020-07-12, 13:49
Replies: 3
Views: 85
Posted By paulunderwood
? a=eval("(2^10443557-1)/37289325994807"); ?...

? a=eval("(2^10443557-1)/37289325994807");
? print(a)


HTH, depending on the context in which it is being used.

or simply:
? a=(2^10443557-1)/37289325994807;
? print(a)
Forum: Miscellaneous Math 2020-07-12, 01:56
Replies: 35
Views: 1,402
Posted By paulunderwood
"ABstruct" again :crank: How do you feel...

"ABstruct" again :crank:

How do you feel today?
Forum: Software 2020-07-11, 22:33
Replies: 430
Views: 25,942
Posted By paulunderwood
Since mtsieve is open source, you can have...

Since mtsieve is open source, you can have whatever headers you like. Alter and compile.

If that is impossible a simple Perl script to do the conversion is easy to write.
Forum: Twin Prime Search 2020-07-11, 06:23
Replies: 6
Views: 225
Posted By paulunderwood
Alles gut :smile: Your twin is now 9th...

Alles gut :smile: Your twin is now 9th (https://primes.utm.edu/top20/page.php?id=1).
Forum: Data 2020-07-09, 20:33
Replies: 519
Views: 44,582
Posted By paulunderwood
time ./pfgw64 -f0 -od...

time ./pfgw64 -f0 -od -q"(2^10443557-1)/37289325994807" | ../../coding/gwnum/lucasPRP - 1 2 10443557 -1
PFGW Version 4.0.0.64BIT.20190528.x86_Dev [GWNUM 29.8]

No factoring at all, not even...
Forum: Data 2020-07-09, 12:13
Replies: 519
Views: 44,582
Posted By paulunderwood
Will do...

Will do...
Forum: Data 2020-07-09, 06:59
Replies: 519
Views: 44,582
Posted By paulunderwood
Congrats! I'll leave it to ATH to do a Lucas test.

Congrats! I'll leave it to ATH to do a Lucas test.
Forum: Prime Gap Searches 2020-07-08, 21:27
Replies: 51
Views: 6,245
Posted By paulunderwood
James while John had had had had had had had had...

James while John had had had had had had had had had had had a better effect on the teacher...
Forum: Miscellaneous Math 2020-07-08, 16:04
Replies: 14
Views: 271
Posted By paulunderwood
For n > 1, N = 2^n +1 has to be a generalized...

For n > 1, N = 2^n +1 has to be a generalized Fermat prime (https://primes.utm.edu/top20/page.php?id=12) with b=2 i.e 2^(2^a)+1, but 2^a+1 can never be a power of 2 :smile:
Forum: Miscellaneous Math 2020-07-08, 15:42
Replies: 14
Views: 271
Posted By paulunderwood
n=0.

n=0.
Forum: Miscellaneous Math 2020-07-08, 06:56
Replies: 62
Views: 5,000
Posted By paulunderwood
Q=-1 and a 35/45 selfridge test?

Based on the solutions to x^2-a*x-1=0, the following test seems to have, where they exist, 6 solutions for n==1 mod 4, or 8 solutions for n==3 mod 4. (a<=(n-1)/2). I have only tested semiprimes! Are...
Forum: Software 2020-07-07, 20:33
Replies: 430
Views: 25,942
Posted By paulunderwood
It is not intuitive. WIBNI there was some kind of...

It is not intuitive. WIBNI there was some kind of drop-down selector for the types?

Unless Chris Caldwell spots the error or someone notifies him of it, your entry will not be right and it will...
Forum: Software 2020-07-07, 18:45
Replies: 430
Views: 25,942
Posted By paulunderwood
The comment to your twin primes should be "Twin...

The comment to your twin primes should be "Twin (p)" and "Twin (p+2)" -- you need to submit both. The UTM parser is very finickety.

Congrats!
Forum: Information & Answers 2020-07-06, 15:33
Replies: 2
Views: 165
Posted By paulunderwood
Ron was wrong, Whit is right...

Ron was wrong, Whit is right (https://eprint.iacr.org/2012/064.pdf)
Forum: And now for something completely different 2020-07-05, 19:25
Replies: 11
Views: 2,292
Posted By paulunderwood
2-3 weeks, maybe a month.

2-3 weeks, maybe a month.
Forum: Software 2020-07-05, 19:20
Replies: 430
Views: 25,942
Posted By paulunderwood
I think it is this one:...

I think it is this one: https://primes.utm.edu/bios/page.php?id=449
Forum: Software 2020-07-04, 20:01
Replies: 14
Views: 554
Posted By paulunderwood
Thanks Jean. It seems a little slower for...

Thanks Jean. It seems a little slower for 69*2^n-1 at ~7 million bits, but it should be more robust! :tu:
Forum: Information & Answers 2020-07-04, 10:38
Replies: 2
Views: 185
Posted By paulunderwood
I believe Primo can work on Windows through the...

I believe Primo can work on Windows through the Linux subsystem: WSL2 (https://docs.microsoft.com/en-us/windows/wsl/install-win10)
Forum: Computer Games 2020-07-04, 09:06
Replies: 39
Views: 5,463
Posted By paulunderwood
Ah yes, xbill...

Ah yes, xbill (https://en.wikipedia.org/wiki/XBill), play until you have index finger damage.
Forum: Computer Games 2020-07-04, 08:57
Replies: 39
Views: 5,463
Posted By paulunderwood
Abuse...

Abuse (https://en.wikipedia.org/wiki/Abuse_(video_game)) is good in that you can alter the Lisp source code to do things like make the monsters jump higher.
Forum: Computer Games 2020-07-04, 07:21
Replies: 39
Views: 5,463
Posted By paulunderwood
ASCII Star Trek which is part of the package...

ASCII Star Trek which is part of the package "bsdgames", and of course "wargames" are amongst my favourite old games
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