[quote=ET_;218522]Thank you, so Issue 2 is cleared :smile:

As for k*2^n+/-1, they are quite the numbers I'm sieving as possible Fermat factors...

Luigi[/quote]
Could you post one or more of the headers from the ABCD file here? (They're the lines that start with "ABCD".) It's possible that FermFact uses a nonstandard format as compared to the ones generally used by srsieve (which, as I understand it, is what ppsieve is designed to read--though I will disclaim that I have never used ppsieve myself).

[QUOTE=mdettweiler;218525]Could you post one or more of the headers from the ABCD file here? (They're the lines that start with "ABCD".) It's possible that FermFact uses a nonstandard format as compared to the ones generally used by srsieve (which, as I understand it, is what ppsieve is designed to read--though I will disclaim that I have never used ppsieve myself).[/QUOTE]

Here they are:

ABC file:
[code]
ABC $a*2^$b+1
1201 100016
1201 100076
1201 100148
1201 100168
1201 100268
1201 100360
1201 100388
1201 100416
[/code]

ABCD file:
[code]
ABCD $a*2^100000+1 [1255]
18
20
52
8
4
120
44
34
18
62
10
30
42
[/code]

Thanks :smile:

Luigi

[quote=ET_;218530]Here they are:

ABC file:
[code]
ABC $a*2^$b+1
1201 100016
1201 100076
1201 100148
1201 100168
1201 100268
1201 100360
1201 100388
1201 100416
[/code]

ABCD file:
[code]
ABCD $a*2^100000+1 [1255]
18
20
52
8
4
120
44
34
18
62
10
30
42
[/code]

Thanks :smile:

Luigi[/quote]
Aha, I think I see what the problem is. Your first ABC file should be fine, but the ABCD file is for a fixed-n format--ppsieve is designed for fixed-k sieves, so it won't understand that kind of notation. If you can convert it to an $a*2^$b+1 or k*2^$b+1 format, it will likely work.

[QUOTE=mdettweiler;218541]Aha, I think I see what the problem is. Your first ABC file should be fine, but the ABCD file is for a fixed-n format--ppsieve is designed for fixed-k sieves, so it won't understand that kind of notation. If you can convert it to an $a*2^$b+1 or k*2^$b+1 format, it will likely work.[/QUOTE]

I'm afraid not... I tested the ABC file, and it is not correctly parsed either. :-(

Luigi

[quote=ET_;218569]I'm afraid not... I tested the ABC file, and it is not correctly parsed either. :-(

Luigi[/quote]
Huh, that's strange. Since it's designed for k*2^n+1 numbers, I would think that it would surely work fine with them.

Here, I've got another idea. Try replacing the "ABC $a*2^$b+1" in the first file with "0:P:0:2:257"--essentially changing the file to NewPGen format. Then, run it through the srfile program (included with the previously-linked srsieve) as:
[I]srfile -a filename[/I]
where filename is the name of your now-NewPGen format sieve file. srfile should then convert the file to an "ABCD k*2^$a+1" format file--which ppsieve surely should take.

Hi, :smile:
[QUOTE]M( 70022021 )C, 0x8fc5e5f795149ff8, n = 4194304, MacLucasFFTW v8.1 Ballester[/QUOTE]

How long did it take?

Nice, there are only 12 exponents above that available for double-checking, the highest of which is in 150M range. What is the upper limit of 8M fft?

Hi, lycorn
[QUOTE=lycorn;220346]How long did it take?[/QUOTE]
18 days.:smile:

Hi, wavelet3000
[QUOTE=wavelet3000;220358]Nice, there are only 12 exponents above that available for double-checking, the highest of which is in 150M range. What is the upper limit of 8M fft?[/QUOTE]
This program is memory eater.:down:
I think GTX480 can support 16M fft.

[QUOTE=msft;220368]I think GTX480 can support 16M fft.[/QUOTE]
Nope. On the GTX 480, the 8M FFT runs at 18.53 ms/iteration, but the 16M FFT gives cufftSafeCall() CUFFT error in the cufftPlan1d() call.