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Search took 0.04 seconds. Search: Posts Made By: jcrombie

Forum: EdH

2021-05-30, 18:45

Replies: 118

How I install YAFU onto my Ubuntu Machines

Views: 41,985

Posted By jcrombie

Just compiled the branches/wip in gcc 10.3. I've...

Just compiled the branches/wip in gcc 10.3. I've attach a patch file. (To patch, "cd branches/wip ; svn patch patchfile") Cheers.

Forum: Factoring

2018-09-14, 16:13

Replies: 485

Brent tables reservations

Views: 74,033

Posted By jcrombie

Thanks for your help Ricky!

Thanks for your help Ricky!

Forum: Math

2018-08-30, 17:35

Replies: 11

Why are numbers sum(2^(k*c)) smooth?

Views: 3,302

Posted By jcrombie

Sorry, try this link...

Sorry, try this link (http://myfactorcollection.mooo.com:8090/index.html#AlgebraicFactorsQuery).

Forum: Math

2018-08-30, 15:17

Replies: 11

Why are numbers sum(2^(k*c)) smooth?

Views: 3,302

Posted By jcrombie

This...

This (http://myfactors.mooo.com/#AlgebraicFactorsQuery) might be useful for playing around with.

Forum: YAFU

2018-04-27, 16:48

Replies: 18

"too few cycles, matrix probably cannot build"

Views: 5,276

Posted By jcrombie

That would be in top/driver.c Checking my...

That would be in top/driver.c

Checking my own code, I just commented out line 126:

Cheers.

Forum: YAFU

2018-04-27, 16:12

Replies: 18

"too few cycles, matrix probably cannot build"

Views: 5,276

Posted By jcrombie

If you're willing to mess with the code a bit,...

If you're willing to mess with the code a bit, this should work. (I noticed msieve is now at version 1019, but all the modified files seem to be untouched since ver 1015).

Forum: YAFU

2017-10-10, 04:56

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

Ooops, guess that wasn't clear. Yafu crashed...

Ooops, guess that wasn't clear. Yafu crashed after about 20 more batch entries. Only crashes on one machine so far.

Forum: YAFU

2017-10-09, 18:04

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

Ben, Found a problem and a fix. If your...

Ben,

Found a problem and a fix. If your snfs number has >2 prime factors, yafu may switch over to siqs after finding a single factor. This eventually caused stability issues on one of my...

Forum: Factoring

2017-10-09, 17:07

Replies: 485

Brent tables reservations

Views: 74,033

Posted By jcrombie

Hi Chris, The only info I've got on how much...

Hi Chris,

The only info I've got on how much ecm effort has been done is here (http://maths-people.anu.edu.au/~brent/pub/pub200.html). It states "We would be surprised if many factors of less...

Forum: FactorDB

2017-09-30, 22:11

Replies: 67

The "Hey YOU" Thread

Views: 14,611

Posted By jcrombie

If you follow the way it's done on paper with the...

If you follow the way it's done on paper with the Cunningham project, then you significantly reduce the amount of storage required. Just store factors of primitives and recalculate on the fly when...

Forum: YAFU

2017-09-30, 18:02

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

Hi Ed, Just tried my freshly compiled wip...

Hi Ed,

Just tried my freshly compiled wip version with your number,

09/30/17 11:46:56 v1.35-beta @ Octacore, System/Build Info:
Using GMP-ECM 7.0.4, Powered by GMP 6.1.2
detected AMD...

Forum: YAFU

2017-09-28, 20:52

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

Yep, using /trunk. Will definitely have to check...

Yep, using /trunk. Will definitely have to check out what goodies are in /wip.

Forum: YAFU

2017-09-28, 19:36

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

So doing some more poking around. (svn 366 in...

So doing some more poking around. (svn 366 in Ubuntu bash for windows). It does crash later on with the indup variable, but here is where it first does something bad.

(gdb) start...

Forum: YAFU

2017-09-25, 17:37

Replies: 506

yafu bugs

Views: 91,773

Posted By jcrombie

It's a buffer overflow. Buffer size is 1024...

It's a buffer overflow. Buffer size is 1024 which means 1023 is the max number of digits for your input number n.

driver.c L109

indup = (char *)malloc(GSTR_MAXSIZE*sizeof(char));

...

Forum: Factoring

2017-04-06, 16:12

Replies: 485

Brent tables reservations

Views: 74,033

Posted By jcrombie

Yikes! I'll see if I can get an alternate url...

Yikes! I'll see if I can get an alternate url working. (Thanks for mentioning that Chris!)

Forum: Factoring

2016-10-24, 01:49

Replies: 485

Brent tables reservations

Views: 74,033

Posted By jcrombie

Yep, just the joys of not having a static ip. ...

Yep, just the joys of not having a static ip. Should be working shortly.

Forum: CADO-NFS

2016-04-24, 02:52

Replies: 22

Playing with CADO's individual polyselect binaries

Views: 7,796

Posted By jcrombie

Sure, deg 5 polys have 6 coefficients. (I'm sure...

Sure, deg 5 polys have 6 coefficients. (I'm sure you'll be kicking yourself for that :smile:)

Forum: Cunningham Tables

2014-08-26, 08:07

Replies: 379

Sticky: 2- table

Views: 90,860

Posted By jcrombie

check out this...

check out this (https://eprint.iacr.org/2014/397).

(from a simple google "arjen miele gpu" and it was working 4 days ago.:smile:)

Forum: Factoring

2014-07-22, 06:05

Replies: 84

Factoring EM47

Views: 12,904

Posted By jcrombie

No new curves past the Sept 26, 2012 post. (And...

No new curves past the Sept 26, 2012 post. (And I've got a lot on my plate right now, so nothing planned for the near future.) Thanks for the update though and the work:tu:

Forum: Cunningham Tables

2014-05-25, 06:13

Replies: 379

Sticky: 2- table

Views: 90,860

Posted By jcrombie

mea culpa this time. I was just entering...

mea culpa this time. I was just entering 96^127-1, and I noticed no one had entered these new Cunningham factors. They came straight from Wagstaff's page.

How about a little patience guys? ...

Forum: Factoring

2014-05-23, 09:05

Replies: 485

Brent tables reservations

Views: 74,033

Posted By jcrombie

(If I didn't say thanks for the poly for the last...

(If I didn't say thanks for the poly for the last reservation, then I'll say it now. Thanks Chris!!!)

Reserving the next one down:

95^118+1 c176

Forum: Msieve

2014-05-10, 17:58

Replies: 2,208

Polynomial Request Thread

Views: 215,285

Posted By jcrombie

Thanks Jason for straightening out my muddled...

Thanks Jason for straightening out my muddled thinking there.:davieddy:

(FWIW, I probably heard the order of magnitude ref in regards to how much time the GPU version takes for an equivalent...

Forum: Msieve

2014-05-10, 15:32

Replies: 2,208

Polynomial Request Thread

Views: 215,285

Posted By jcrombie

pol51 holds its own

Top 3 Candidates:

skew: 1195653.98
# norm 5.84e+22
c5: 22302000
c4: -464777566858860
c3: -99436795485673648928
c2: 578297457968152336612278175
c1: 48812371410286624110411117747644
c0:...

Forum: Msieve

2014-05-08, 02:57

Replies: 2,208

Polynomial Request Thread

Views: 215,285

Posted By jcrombie

Thanks Chris, I've started 6 CPU cores on...

Thanks Chris,

I've started 6 CPU cores on the old pol51 binaries for something to compare with. They should be done in a couple of days.

Forum: Msieve

2014-05-06, 20:56

Replies: 2,208

Polynomial Request Thread

Views: 215,285

Posted By jcrombie

Greetings, I've got a c161 from 96^127-1. ...

Greetings,

I've got a c161 from 96^127-1. (ecm pre-tested to t55)
...

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