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Search: Posts Made By: charybdis
Forum: CADO-NFS 2022-01-23, 22:14
Replies: 12
Views: 260
Posted By charybdis
No problem! It's always a pleasure :tu:

No problem! It's always a pleasure :tu:
Forum: CADO-NFS 2022-01-23, 21:49
Replies: 12
Views: 260
Posted By charybdis
Great, hope everything goes smoothly from here....

Great, hope everything goes smoothly from here. :smile:
Forum: CADO-NFS 2022-01-23, 20:30
Replies: 12
Views: 260
Posted By charybdis
Aha, I think I might know what's happened. With...

Aha, I think I might know what's happened. With the latest CADO, you're getting errors like
## Check for krylov: missing check vector Cv0-64.1040
and so it goes back to the start of...
Forum: CADO-NFS 2022-01-23, 19:46
Replies: 12
Views: 260
Posted By charybdis
Do you still have the bwc directory backed up...

Do you still have the bwc directory backed up from before you restarted? If not, then your krylov work is probably wasted and you're better off using msieve instead, as it's so much faster - at...
Forum: CADO-NFS 2022-01-23, 11:27
Replies: 12
Views: 260
Posted By charybdis
What revision of CADO are you running? This looks...

What revision of CADO are you running? This looks like this bug (https://gitlab.inria.fr/cado-nfs/cado-nfs/-/issues/30022), which has now been fixed. Try updating to the latest CADO and resuming.
Forum: Factoring 2022-01-22, 19:09
Replies: 28
Views: 962
Posted By charybdis
You'll never have any RAM issues with 128GB.

You'll never have any RAM issues with 128GB.
Forum: Lounge 2022-01-22, 19:06
Replies: 45
Views: 1,030
Posted By charybdis
Agreed on Abel. Mentioning Hendrik Lenstra...

Agreed on Abel.

Mentioning Hendrik Lenstra feels like a bit of mersenneforum bias creeping in? Many would place his LLL coauthor László Lovász above him.
Forum: Lounge 2022-01-22, 13:42
Replies: 45
Views: 1,030
Posted By charybdis
Joseph-Louis Lagrange, Emmy Noether and John von...

Joseph-Louis Lagrange, Emmy Noether and John von Neumann are notable omissions so far.

I'm not sure what Hypatia has done to deserve her place on this list. I hope she wasn't added solely for...
Forum: Factoring 2022-01-22, 13:33
Replies: 28
Views: 962
Posted By charybdis
Factorization speed does not depend on RAM, but...

Factorization speed does not depend on RAM, but for large numbers the postprocessing phase is RAM-intensive and this puts an upper limit on the size of numbers that can be run on a given machine....
Forum: Factoring 2022-01-19, 18:56
Replies: 3
Views: 184
Posted By charybdis
As I understand it, a major issue with running...

As I understand it, a major issue with running lattice sieving on GPUs is that they have poor memory latency compared to CPUs. Every time the sieve hits a lattice entry, that entry must be modified....
Forum: CADO-NFS 2022-01-12, 23:46
Replies: 88
Views: 15,758
Posted By charybdis
In this case filtering would have failed whatever...

In this case filtering would have failed whatever target_density was used, because there were more ideals than relations. Once you have more relations than ideals and the excess is greater than the...
Forum: CADO-NFS 2022-01-12, 12:26
Replies: 88
Views: 15,758
Posted By charybdis
The effect isn't exactly the same, though both...

The effect isn't exactly the same, though both can be used to ensure that the matrix you get isn't way too big. required_excess tells filtering not to try building a matrix if the excess is too...
Forum: Msieve 2022-01-12, 12:14
Replies: 2
Views: 100
Posted By charybdis
Remdups will need to go through the whole set of...

Remdups will need to go through the whole set of relations again, but it only needs the unique relations from the previous run. You can add the new relations to the previously de-duplicated relations...
Forum: CADO-NFS 2022-01-05, 19:33
Replies: 88
Views: 15,758
Posted By charybdis
This is normal, it's a consequence of the varying...

This is normal, it's a consequence of the varying number of special-q within ranges of size 5000. The number of relations per special-q varies much less.

Incidentally, the number of special-q per...
Forum: YAFU 2021-12-31, 13:49
Replies: 11
Views: 500
Posted By charybdis
I find it more convenient to add "v=1" to...

I find it more convenient to add "v=1" to yafu.ini; this way, -v is automatically set without you having to remember to add it to the command line each time.
Forum: Msieve 2021-12-30, 20:28
Replies: 15
Views: 459
Posted By charybdis
OK, maybe I should get round to deleting my ~75GB...

OK, maybe I should get round to deleting my ~75GB of accumulated CADO relation files from now-finished SNFS jobs. Should be fine as long as I don't mix them up with unfinished jobs... :whistle:
Forum: Msieve 2021-12-30, 19:35
Replies: 15
Views: 459
Posted By charybdis
Isn't accidentally deleting all the relations and...

Isn't accidentally deleting all the relations and having to restart from scratch an important character-building experience? :lol:

In all seriousness, if you're worried about things going wrong...
Forum: NFS@Home 2021-12-29, 23:05
Replies: 1,899
Views: 168,305
Posted By charybdis
Haven't test-sieved this but I agree that the...

Haven't test-sieved this but I agree that the octic should be looked at too. From a small amount of test-sieving on 7,395+/- (diff. 268, the smallest remaining Cunningham quartics before the base-2...
Forum: Cunningham Tables 2021-12-29, 15:27
Replies: 323
Views: 49,016
Posted By charybdis
Congratulations! Always a relief to see that the...

Congratulations! Always a relief to see that the factors are out of ECM range. :smile:

Don't forget to inform Sam Wagstaff if you haven't already.
Forum: mersenne.ca 2021-12-29, 15:21
Replies: 13
Views: 424
Posted By charybdis
The incorrect figure of 1421.79 bits almost...

The incorrect figure of 1421.79 bits almost certainly comes from taking the number of digits in the factor, 428, and multiplying it by log2(10). The same can be seen with M1723...
Forum: YAFU 2021-12-29, 02:18
Replies: 2
Views: 136
Posted By charybdis
Read the code...

Read the code (https://github.com/bbuhrow/yafu/blob/master/factor/autofactor.c), and ye shall find...

// initialize max allowed work fields (note: maybe this structure should
// be visible to...
Forum: Miscellaneous Math 2021-12-25, 17:33
Replies: 24
Views: 632
Posted By charybdis
If this number was prime, the mathematical...

If this number was prime, the mathematical community would immediately understand that this was a complete coincidence and totally unrelated to the fact that the exponent looks like the base-10...
Forum: NFS@Home 2021-12-23, 13:44
Replies: 131
Views: 13,054
Posted By charybdis
Don't forget to reserve this with Sam Wagstaff.

Don't forget to reserve this with Sam Wagstaff.
Forum: CADO-NFS 2021-12-22, 14:11
Replies: 63
Views: 18,474
Posted By charybdis
No, I'm not suggesting that msieve will require...

No, I'm not suggesting that msieve will require 40M more relations than CADO to build a matrix, nor am I suggesting that you actually keep sieving until reaching 250M relations.

The issue is that...
Forum: CADO-NFS 2021-12-20, 23:33
Replies: 63
Views: 18,474
Posted By charybdis
Are these crashes in postprocessing caused by the...

Are these crashes in postprocessing caused by the known composite-factor bug? If so, the solution for bur would be to set rels_wanted higher than the target - maybe 250M - so that an msieve filtering...
Showing results 1 to 25 of 593

 
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