mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 169
Search took 0.03 seconds.
Search: Posts Made By: charybdis
Forum: Cunningham Tables 2021-01-20, 13:12
Replies: 229
Views: 38,562
Posted By charybdis
That looks a lot more than 30M relations short to...

That looks a lot more than 30M relations short to me. To get a good matrix I'd want the initial number of relations to be a bit bigger than the number of ideals, so you probably want 100M more raw...
Forum: Factoring 2021-01-19, 15:47
Replies: 896
Views: 72,132
Posted By charybdis
grep -v ",[8-9a-f]........$" should remove all...

grep -v ",[8-9a-f]........$" should remove all lines ending with a 36-bit prime, which is what we need.
Forum: Factoring 2021-01-18, 22:49
Replies: 896
Views: 72,132
Posted By charybdis
How's CPU usage looking? Is msieve actually doing...

How's CPU usage looking? Is msieve actually doing anything or is it just hanging? And while we're at it, how's memory usage?
Forum: Cunningham Tables 2021-01-18, 21:23
Replies: 229
Views: 38,562
Posted By charybdis
Just thrown in 45 more cores to help speed things...

Just thrown in 45 more cores to help speed things along to the finish line.
Forum: Cunningham Tables 2021-01-14, 14:50
Replies: 229
Views: 38,562
Posted By charybdis
My machines are up and running. ...

My machines are up and running.



Adjust-strategy 2 does use a bit more memory than the default, but each process should still fit within 4GB.
Forum: Factoring 2021-01-12, 21:13
Replies: 896
Views: 72,132
Posted By charybdis
Another suggestion: if the huge volume of...

Another suggestion: if the huge volume of relations is posing problems for msieve, then you could try turning this into a 33/35 job by removing all the relations with 36-bit algebraic factors using...
Forum: Cunningham Tables 2021-01-12, 17:20
Replies: 229
Views: 38,562
Posted By charybdis
The best from my run, by some margin, is n:...

The best from my run, by some margin, is
n:...
Forum: NFS@Home 2021-01-12, 17:15
Replies: 93
Views: 6,557
Posted By charybdis
It's natural log. PNT says the probability that n...

It's natural log. PNT says the probability that n is prime is ~1/log(n), so C/log(Q) is indeed the expected number of primes in the range.
Forum: Factoring 2021-01-11, 23:07
Replies: 896
Views: 72,132
Posted By charybdis
According to jasonp the CADO filtering format has...

According to jasonp the CADO filtering format has changed (https://mersenneforum.org/showthread.php?t=22624) since that code was written. An old version of CADO could work but I don't know whether it...
Forum: Cunningham Tables 2021-01-11, 20:19
Replies: 229
Views: 38,562
Posted By charybdis
Got the go-ahead from Sam. :smile: I'll do...

Got the go-ahead from Sam. :smile:

I'll do P=5M, admax=10M, incr=420.
Forum: Cunningham Tables 2021-01-11, 19:42
Replies: 229
Views: 38,562
Posted By charybdis
Done. I suppose it's possible he's already...

Done. I suppose it's possible he's already started working on it himself and just hasn't got round to updating the reservation page, so I'll keep everyone updated.

What parameters are you using...
Forum: Cunningham Tables 2021-01-11, 19:17
Replies: 229
Views: 38,562
Posted By charybdis
Sam Wagstaff just knocked 2,2390M down to c191...

Sam Wagstaff just knocked 2,2390M down to c191 with ECM.
No-one has reserved it yet - could this be a target for a short forum team sieve?
Forum: Factoring 2021-01-11, 17:58
Replies: 896
Views: 72,132
Posted By charybdis
Seems worrying that it's stuck at 2-way merge...

Seems worrying that it's stuck at 2-way merge rather than full merge. A bug in msieve, perhaps?

Also I'm thinking "well over 100M" may be an understatement...
Forum: NFS@Home 2021-01-10, 21:53
Replies: 93
Views: 6,557
Posted By charybdis
This is to be expected in general. The noise in...

This is to be expected in general. The noise in the yield comes from the number of special-q in a range deviating from the expectation. The number of special-q for a given prime is the number of...
Forum: NFS@Home 2021-01-10, 03:26
Replies: 93
Views: 6,557
Posted By charybdis
I'm very surprised if -r side is faster. Are you...

I'm very surprised if -r side is faster. Are you sure you didn't make an error when testing?
Forum: Factoring 2021-01-09, 22:14
Replies: 896
Views: 72,132
Posted By charybdis
That looks promising; still can't rule out msieve...

That looks promising; still can't rule out msieve getting stuck in merge for an age before spitting out "too few cycles, matrix probably cannot build", but if that happens then a lower TD or more...
Forum: Aliquot Sequences 2021-01-07, 13:06
Replies: 2,934
Views: 184,135
Posted By charybdis
Very nice! I won't be doing any more searching.

Very nice!
I won't be doing any more searching.
Forum: Aliquot Sequences 2021-01-06, 14:51
Replies: 2,934
Views: 184,135
Posted By charybdis
Nothing exceptional from CADO, but here are the...

Nothing exceptional from CADO, but here are the top 5:

skew: 31667446.08
c0: 635181421872748933108441699486115427125642808
c1: -74986650995391412139123003935796048006
c2:...
Forum: Aliquot Sequences 2021-01-05, 21:22
Replies: 2,934
Views: 184,135
Posted By charybdis
I'm happy to leave this one to NFS@home unless...

I'm happy to leave this one to NFS@home unless there's more interest in a quick team-sieve.

We need a polynomial in any case, so I'm starting a CADO run with P=4M, admax=10M, incr=420. Help is...
Forum: Aliquot Sequences 2021-01-05, 19:58
Replies: 2,934
Views: 184,135
Posted By charybdis
t55 + just over half t60 complete on the c189. ...

t55 + just over half t60 complete on the c189.

Is there any interest in getting GNFS done? If so, I'll run some CADO polyselect.
Forum: Puzzles 2021-01-04, 21:54
Replies: 13
Views: 502
Posted By charybdis
Not sure if this counts as elegant: Suppose...

Not sure if this counts as elegant:

Suppose n = ab where b>1 is odd. Then when we write n = a+...+a, one of the a's is in the middle, so we can easily rewrite this as a sum of consecutive...
Forum: Factoring 2021-01-04, 13:32
Replies: 896
Views: 72,132
Posted By charybdis
The siever runs just fine with Q > 2^32. There is...

The siever runs just fine with Q > 2^32. There is a flag "SUPPORT_LARGE_Q" which is needed to support Q-lattice basis coordinates larger than 2^31. For this job the basis coordinates are more like...
Forum: Aliquot Sequences 2021-01-03, 20:37
Replies: 2,934
Views: 184,135
Posted By charybdis
i12574

Now on a c189.
I've run just under half a t50 so far, so if anyone wants to run ECM it would be best to start at the 55-digit level or higher.
Forum: Aliquot Sequences 2021-01-02, 13:15
Replies: 2,934
Views: 184,135
Posted By charybdis
Next line has a c159, running GNFS now.

Next line has a c159, running GNFS now.
Forum: Aliquot Sequences 2021-01-02, 13:12
Replies: 463
Views: 39,773
Posted By charybdis
And now a further 3500@40e7, 6700@65e7 and...

And now a further 3500@40e7, 6700@65e7 and 3900@12e8.
In hindsight it might have been better for me to stick to 40/42e7 and for Yoyo to start at 85e7, but I expected Yoyo would have got going by...
Showing results 1 to 25 of 169

 
All times are UTC. The time now is 21:44.

Sat Jan 23 21:44:45 UTC 2021 up 51 days, 17:56, 0 users, load averages: 1.69, 1.92, 1.95

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.