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Forum: Factoring 2021-10-19, 00:05
Replies: 60
Views: 4,998
Posted By VBCurtis
I reckon deg 6 and 5 will be competitive around...

I reckon deg 6 and 5 will be competitive around 2^700. That is, from something like 2^680 to 2^720 which one is faster depends on the individual polynomials.

On ggnfs, I found 15e faster than 14e...
Forum: Factoring 2021-07-11, 19:02
Replies: 60
Views: 4,998
Posted By VBCurtis
As you get into jobs that take days rather than...

As you get into jobs that take days rather than hours, you'll want to test-sieve parameters yourself. There aren't solid rules-of-thumb for SNFS jobs like there are for GNFS, because optimal...
Forum: Factoring 2021-06-03, 13:45
Replies: 60
Views: 4,998
Posted By VBCurtis
For GNFS, Q-max to Q-min ratio around 8 is best-...

For GNFS, Q-max to Q-min ratio around 8 is best- after Charybdis did his testing on a large job, I repeated the tests for C110-C140 and confirmed his findings. I now use Qmin = 150k for the C120...
Forum: Factoring 2021-06-02, 14:41
Replies: 60
Views: 4,998
Posted By VBCurtis
It's advisable to experiment a lot, as you are...

It's advisable to experiment a lot, as you are doing. That's how we all learned!
SNFS jobs have fewer "do it this way" guidelines, more job-specific settings.
I'm surprised there is a factor-of-2...
Forum: Factoring 2021-06-01, 19:09
Replies: 60
Views: 4,998
Posted By VBCurtis
When the norms of the two sides are quite...

When the norms of the two sides are quite different in size, CADO is more efficient when making the side with the larger norm also have a larger lim.
Since your job has anorm and rnorm very similar...
Forum: Factoring 2021-06-01, 17:47
Replies: 60
Views: 4,998
Posted By VBCurtis
I think you'll fly through all the composites...

I think you'll fly through all the composites under 2^600 for your chosen k-value rather quickly now. :)

I'd try making lim0 and lim1 the same (use the larger of the two from my C120 file)....
Forum: Factoring 2021-05-31, 21:43
Replies: 60
Views: 4,998
Posted By VBCurtis
Does CADO compute skew automagically, or does Bur...

Does CADO compute skew automagically, or does Bur need to supply it?

If you need it, I suggest you use myfactors.mooo.com, "calculators" link at the top of the page. Enter your poly, and the...
Forum: Factoring 2021-05-31, 03:09
Replies: 60
Views: 4,998
Posted By VBCurtis
I tried this: I tried OP's 1281979*2^n+1, with n...

I tried this: I tried OP's 1281979*2^n+1, with n = 647. Multiplying by 8 to make a poly ending in +8 and Y0 = 2^130 had score 6.444e-12, while factoring out a 4 and making a poly ending in +1 with...
Forum: Factoring 2021-05-30, 14:47
Replies: 60
Views: 4,998
Posted By VBCurtis
For your proth searches, you want to write your...

For your proth searches, you want to write your input number as a * (x^5) + c.
Then c5 = a, c0 = c, y1 = 1, y0 = x (I forget if it's positive or negative).

5th degree polys are best for roughly...
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