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Forum: Software 2020-06-04, 03:15
Replies: 344
Views: 22,398
Posted By Citrix
gcwsievecl.exe -p 3770000000000 -P 4000000000000...

gcwsievecl.exe -p 3770000000000 -P 4000000000000 -b 2 -n 825 -N 1000 -s +



Same error. Crashes after printing banner. Though the gcwsievecl.exe from latest release does work as I mentioned...
Forum: Software 2020-06-04, 01:26
Replies: 344
Views: 22,398
Posted By Citrix
I was able to give this a try by replacing the...

I was able to give this a try by replacing the CullenWoodallWorker class. No improvement. Still crashes.

In the latest build the gcwsievecl does work on my computer.

Would this have to do with...
Forum: Software 2020-05-30, 20:07
Replies: 344
Views: 22,398
Posted By Citrix
Clean build. No luck. still crashes. It does...

Clean build. No luck. still crashes.
It does not work with the original cw_kernel.cl file either.
I am on Windows 10 if that makes a difference.
Forum: Software 2020-05-30, 17:54
Replies: 344
Views: 22,398
Posted By Citrix
You need to add gcwsievecl to ...

You need to add gcwsievecl to

GPU_PROGS=afsievecl mfsievecl gfndsievecl pixsievecl xyyxsievecl

Compiles for me and at least I get
"gcwsievecl.exe -p 3770000000000 -P 4000000000000 -b 2 -n 825...
Forum: Software 2020-05-30, 16:57
Replies: 344
Views: 22,398
Posted By Citrix
Where do you get the new makefile from?

Where do you get the new makefile from?
Forum: Software 2020-05-30, 16:38
Replies: 344
Views: 22,398
Posted By Citrix
Did not compile - "too many paths"

Did not compile - "too many paths"
Forum: Software 2020-05-30, 15:15
Replies: 344
Views: 22,398
Posted By Citrix
It did not work for me. :confused2:

It did not work for me. :confused2:
Forum: Software 2020-05-30, 01:19
Replies: 344
Views: 22,398
Posted By Citrix
Looking at the code more closely - In the...

Looking at the code more closely -

In the make file for linking the *cl files the $(GPUCPPFLAGS) and $(*_GPU_OBJS) is missing so the compiler does not even build the GPU.o files.

I now have

...
Forum: Software 2020-05-29, 23:10
Replies: 344
Views: 22,398
Posted By Citrix
No message, It does crash before the start banner...

No message, It does crash before the start banner is printed. Possibly I am not using the input line correctly.

I am using :- Should I be using something else? Both programs crash for me.


...
Forum: Software 2020-05-29, 02:36
Replies: 344
Views: 22,398
Posted By Citrix
I was finally able to modify the GPU code. I had...

I was finally able to modify the GPU code. I had to do the Perl portion manually. The script did not work for me. It goes into an infinite while loop. The code did compile.

Though I cannot get the...
Forum: Software 2020-05-28, 21:53
Replies: 29
Views: 884
Posted By Citrix
I am posting a simpler explanation of the...

I am posting a simpler explanation of the algorithm here - in case some can come up with a faster implementation



Take all the remaining candidates in a range Nmin to Nmax
Let b be the base...
Forum: Software 2020-05-28, 20:41
Replies: 29
Views: 884
Posted By Citrix
I did try implementing the algorithm. There...

I did try implementing the algorithm. There possibly is some small bug as it is not producing all the factors. I can't find it right now. I do not have a debugger for GCC to help me.

For base 2
I...
Forum: Software 2020-05-28, 05:25
Replies: 29
Views: 884
Posted By Citrix
I am not sure if you understood the algorithm...

I am not sure if you understood the algorithm correctly.
Here is the pseudocode


Given a base b, nmin, nmax, prime p to sieve.

Choose a value C where C<=nmax-nmin && (nmax-nmin+1)%C==0; need...
Forum: Software 2020-05-27, 16:54
Replies: 29
Views: 884
Posted By Citrix
I am suggesting using a few more primes, other...

I am suggesting using a few more primes, other than 2, like 3,5,7,13 etc (Covering sets)
The code below is from mtsieve for prime 2.



// If the base is odd, then all n must be even and thus...
Forum: Software 2020-05-27, 04:26
Replies: 29
Views: 884
Posted By Citrix
gcwsieve enhancements

// We're trying to determine if n*b^n (mod p) = +1/-1. This requires an two
// operations, an exponentiation (b^n) and a multiplication (n). We can make a
// change to eliminate one of those...
Forum: Software 2020-05-27, 03:37
Replies: 344
Views: 22,398
Posted By Citrix
Just multiplying the (Double) floating point...

Just multiplying the (Double) floating point number with 1/2 (mod p).

I looked into the code further. I was wrong before on get and set giving the error. This portion of the code gives the error....
Forum: Software 2020-05-26, 23:13
Replies: 344
Views: 22,398
Posted By Citrix
I will see if I can post an example in which...

I will see if I can post an example in which factors are missed.


void TestPrimesAVX(void)
{
double __attribute__((aligned(32))) powinvs[AVX_ARRAY_SIZE];

double...
Forum: Software 2020-05-26, 21:14
Replies: 344
Views: 22,398
Posted By Citrix
I was able to modify the AVX - substantially...

I was able to modify the AVX - substantially faster. Getting 1.2Mp/sec on 4 cores.
Though limited to 2^52.



Is there a faster way of doing this

avx_set_16a(tempinvs);...
Forum: Software 2020-05-26, 08:16
Replies: 344
Views: 22,398
Posted By Citrix
I was able to compile the code. Needed to do some...

I was able to compile the code. Needed to do some debugging.

I would recommend you include https://github.com/GPUOpen-LibrariesAndSDKs/OCL-SDK/releases &...
Forum: Software 2020-05-25, 05:49
Replies: 344
Views: 22,398
Posted By Citrix
I tried to write the code my self. I have...

I tried to write the code my self. I have attached it.

The program mainly writes the factors to factor file which need to be processed by srfile. There is no input or output file.

I only...
Forum: Software 2020-05-24, 04:55
Replies: 344
Views: 22,398
Posted By Citrix
Thanks. I am working on kmin=2 kmax=n ...

Thanks.

I am working on
kmin=2
kmax=n
b=2
N=n*n
c=+1 and -1

Currently I am using fbncsieve (now twinsieve) for each N value separately using a script.
Forum: Software 2020-05-21, 00:53
Replies: 273
Views: 26,051
Posted By Citrix
static double expected_factors(uint32_t n,...

static double expected_factors(uint32_t n, uint64_t p0, uint64_t p1)
{
/* TODO: Use a more accurate formula. This one is only reasonable when
p0/p1 is close to 1.
*/

return...
Forum: Software 2020-05-15, 18:28
Replies: 344
Views: 22,398
Posted By Citrix
If using fbncsieve.exe can you sieve sequence...

If using fbncsieve.exe can you sieve sequence k*2^n+1 and k*2^n-1 at the same time (for a range of k)? What command line arguments should one use to do this?

Also if you have multiple n and...
Forum: Lounge 2020-05-15, 04:37
Replies: 39
Views: 949
Posted By Citrix
The data collection can be turned off. ...

The data collection can be turned off.

https://blogs.systweak.com/how-to-disable-telemetry-and-data-collection-in-windows-10/
Forum: Software 2020-04-26, 19:26
Replies: 29
Views: 884
Posted By Citrix
Question for you:- For the low weight...

Question for you:-
For the low weight sequences-
Assuming BSGS requires 64 steps each for a range of 4096
Would the following simpler algorithm be faster on CPU or GPU than BSGS for a 4096 range?...
Showing results 1 to 25 of 1000

 
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