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Forum: And now for something completely different 2022-11-30, 16:27
Replies: 24
Views: 323
Posted By paulunderwood
Did you export LD_LIBRARY_PATH? See this...

Did you export LD_LIBRARY_PATH? See this (https://iq.opengenus.org/set-ld-library-path/).
Forum: And now for something completely different 2022-11-30, 15:52
Replies: 24
Views: 323
Posted By paulunderwood
You might have to sudo make uninstall firstly....

You might have to sudo make uninstall firstly. Let us know how you get on with a fresh machine.
Forum: And now for something completely different 2022-11-30, 15:35
Replies: 24
Views: 323
Posted By paulunderwood
Yes. Later versions produce a primo file,...

Yes. Later versions produce a primo file, although you have rename it with a ".out" extension and chage it to "n=$...." inside the primo file, to get factoDB to accept it. There are scripts using sed...
Forum: And now for something completely different 2022-11-30, 15:11
Replies: 24
Views: 323
Posted By paulunderwood
The next question is: are you you using the same...

The next question is: are you you using the same version of cm? Here is what I am using:

ecpp -v
CM: include 0.4.1dev, lib 0.4.1dev
GMP:...
Forum: And now for something completely different 2022-11-30, 14:12
Replies: 24
Views: 323
Posted By paulunderwood
It might seem like a silly question: Are you...

It might seem like a silly question: Are you using the file flag -f ?
Forum: And now for something completely different 2022-11-30, 06:28
Replies: 217
Views: 23,524
Posted By paulunderwood
I have code that gets the right answer for GWNUM...

I have code that gets the right answer for GWNUM powm, but get an error "malloc(): corrupted top size". I have hit a brick wall. I use M4423 as a test number. Perhaps someone can debug it,

...
Forum: And now for something completely different 2022-11-30, 05:41
Replies: 24
Views: 323
Posted By paulunderwood
@EdH, did you get mpc from...

@EdH, did you get mpc from https://www.multiprecision.org/mpc/download.html ?

I installed the headers only through apt


apt list mpc ...
Forum: And now for something completely different 2022-11-29, 14:25
Replies: 217
Views: 23,524
Posted By paulunderwood
This is not trivial. Can b be negative in...

This is not trivial. Can b be negative in gmp_powm(r,b,e,n)?

I am finding it difficult to debug. If someone else want to have a crack at it then please go ahead.
Forum: And now for something completely different 2022-11-28, 22:27
Replies: 195
Views: 43,853
Posted By paulunderwood
There was no animosity intended. I was merely...

There was no animosity intended. I was merely conveying how much I admire Robert's work that is corn.c, and agreeing with him that the error is most likely with GMP's mpn/mu_div_qr.c somewhere. That...
Forum: And now for something completely different 2022-11-28, 20:55
Replies: 195
Views: 43,853
Posted By paulunderwood
Of course I am using your corn.c. I'd be a fool...

Of course I am using your corn.c. I'd be a fool not to utilize the huge speed up.

I had R86453 fail with this error...
Forum: And now for something completely different 2022-11-28, 19:16
Replies: 195
Views: 43,853
Posted By paulunderwood
https://primes.utm.edu/top20/page.php?id=67 was...

https://primes.utm.edu/top20/page.php?id=67 was used as a source, not OEIS.
Forum: And now for something completely different 2022-11-28, 19:06
Replies: 195
Views: 43,853
Posted By paulunderwood
This is Enge's ecpp-mpi program.

This is Enge's ecpp-mpi program.
Forum: And now for something completely different 2022-11-28, 18:49
Replies: 195
Views: 43,853
Posted By paulunderwood
The same error has occurred at Size [2]. Where is...

The same error has occurred at Size [2]. Where is this bug?

Taking W127031.
Forum: And now for something completely different 2022-11-28, 08:03
Replies: 195
Views: 43,853
Posted By paulunderwood
This number failed at Size [8] 215618 bits with:...

This number failed at Size [8] 215618 bits with: mu_div_qr GNU MP assertion failed cy == 0.

I am now attempting to certify the cofactor of M221509 (prp66673).
Forum: And now for something completely different 2022-11-27, 19:51
Replies: 217
Views: 23,524
Posted By paulunderwood
Thanks Robert. The only thing I had to do...

Thanks Robert. The only thing I had to do differently to your instructions was to use

#include "/home/paul/Downloads/gmp-6.2.1/gmp-impl.h"

I am looking forward to seeing a nice speed up in...
Forum: Miscellaneous Math 2022-11-27, 16:47
Replies: 22
Views: 1,456
Posted By paulunderwood
As with "-12" (GCD-less probably because the...

As with "-12" (GCD-less probably because the discriminant of at r=znorder(Mod(-12,n)) is 1+48, a square) compared to "12", and comparing "-3" to "3" -- the latter needing GCD depending on whether n...
Forum: Miscellaneous Math 2022-11-27, 01:04
Replies: 22
Views: 1,456
Posted By paulunderwood
Hah, I made a complete blunder. The conclusion is...

Hah, I made a complete blunder. The conclusion is 1=1. I have marked it with a red X.
Forum: Miscellaneous Math 2022-11-26, 17:05
Replies: 22
Views: 1,456
Posted By paulunderwood
Partial proof

For a basis we know prime \(p\) that \(x^{p+1} \equiv -3 \pmod{n, x^2-3^rx-3}\) where the Jacobi symbol of the discriminant is \(-1\).

Now suppose \(n=pq\) where \(q>1\) not necessarily prime.
...
Forum: Miscellaneous Math 2022-11-26, 10:17
Replies: 22
Views: 1,456
Posted By paulunderwood
partial results

The GCD-less test for "-12" was verrified using Par/GP my forumite mart_t and me up to 1.2*10^12.

The test for "-3" has now reached 10^12 using GMP+primesieve. It will take a couple of Celeron CPU...
Forum: And now for something completely different 2022-11-25, 20:45
Replies: 217
Views: 23,524
Posted By paulunderwood
Looking at the source for lib/nt.c I see: ...

Looking at the source for lib/nt.c I see:

unsigned long int cm_nt_next_prime (const unsigned long int n)
/* returns the prime following n */

{
static bool init = true;
#ifdef WITH_MPI...
Forum: And now for something completely different 2022-11-25, 05:06
Replies: 195
Views: 43,853
Posted By paulunderwood
Done: Certified and registered at The Prime Pages...

Done: Certified and registered at The Prime Pages (https://primes.utm.edu/primes/page.php?id=134576) and factorDB.

Reserving the M216317 cofactor (https://www.mersenne.ca/exponent/216317)...
Forum: Data 2022-11-25, 04:57
Replies: 592
Views: 129,746
Posted By paulunderwood
I have just made a submission to The Prime Pages...

I have just made a submission to The Prime Pages and uploaded the certificate do factorDB for the M174533 cofactor (https://primes.utm.edu/primes/page.php?id=134576). :flex:
Forum: And now for something completely different 2022-11-24, 00:42
Replies: 217
Views: 23,524
Posted By paulunderwood
I have had a dreaded "*** No suitable curve...

I have had a dreaded "*** No suitable curve found!" at about 20k digits of a 52k digit number. Re-running after reboot to see if it happens again. What can I do to remedy it?

Interestingly instead...
Forum: Lounge 2022-11-23, 17:12
Replies: 2,017
RIP
Views: 264,144
Posted By paulunderwood
Wilko Johnson

https://www.theguardian.com/music/2022/nov/23/wilko-johnson-obituary

A great punk era inspiring guitarist!

Yp2DvPKh118
Forum: mersenne.ca 2022-11-23, 14:09
Replies: 973
Sticky: mersenne.ca
Views: 138,200
Posted By paulunderwood
Thanks for testing. Rebooting my router seems to...

Thanks for testing. Rebooting my router seems to hve fixed the issue. :tu:
Showing results 1 to 25 of 1000

 
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