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Search: Posts Made By: ryanp
Forum: Factoring 2020-10-26, 22:41
Replies: 780
Views: 55,295
Posted By ryanp
I'm doing some ECM now on the top 500 of the...

I'm doing some ECM now on the top 500 of the current mwrb2100. Have already found 2 factors, of (4889^101-1)/4888 and (10627^71-1)/10626.

I've reported these to FactorDB; does Pascal's...
Forum: Factoring 2020-10-22, 19:04
Replies: 61
Views: 2,425
Posted By ryanp
More ECM on this number is not a waste, but it's...

More ECM on this number is not a waste, but it's becoming increasingly difficult. :smile: And it's recommended that you or anyone else do curves at B1=76e8 or higher, maybe 1e10 or 2e10 now.
Forum: Factoring 2020-10-22, 15:59
Replies: 61
Views: 2,425
Posted By ryanp
I've unfortunately lost a complete count of...

I've unfortunately lost a complete count of curves, but I believe I did a full T65 as well as T70 on this number.
Forum: Lone Mersenne Hunters 2020-10-12, 21:09
Replies: 1,708
Views: 145,236
Posted By ryanp
Yep, that was me: GMP-ECM 6.4.4 [configured...

Yep, that was me:

GMP-ECM 6.4.4 [configured with GMP 6.0.0, --enable-asm-redc] [ECM]
Input number is ...
Forum: FermatSearch 2020-10-06, 13:59
Replies: 318
Views: 40,941
Posted By ryanp
Thanks! PFGW is still running. Looks like it...

Thanks! PFGW is still running. Looks like it divides a few other things too.

7*2^18233956+1 is a Factor of F18233954!!!! (163569.267086 seconds)

Special modular reduction using all-complex...
Forum: FermatSearch 2020-10-04, 23:51
Replies: 318
Views: 40,941
Posted By ryanp
From my recent Proth prime: 7*2^18233956+1...

From my recent Proth prime:

7*2^18233956+1 is a Factor of F18233954!!!! (163569.267086 seconds)
Forum: And now for something completely different 2020-09-22, 19:19
Replies: 19
Views: 5,445
Posted By ryanp
An update: the machine running this certification...

An update: the machine running this certification had to be restarted, and I forgot to fire up the job again. Running it again now, with 36 workers. It's currently at "Bits: 78188/78577" in phase 1.
Forum: chalsall 2020-09-11, 22:38
Replies: 12
Views: 431
Posted By ryanp
And here I've been wondering why my SO can't wake...

And here I've been wondering why my SO can't wake up at 4am to go on hikes with me...
Forum: Lone Mersenne Hunters 2020-09-02, 19:20
Replies: 1,708
Views: 145,236
Posted By ryanp
No, there were many more curves run. I just...

No, there were many more curves run. I just report them separately (offline) to George, from time to time...
Forum: Lone Mersenne Hunters 2020-09-02, 03:47
Replies: 1,708
Views: 145,236
Posted By ryanp
I actually use just GMP-ECM, but with gwnum...

I actually use just GMP-ECM, but with gwnum compiled/linked in, which makes stage 1 faster for b^n-1 numbers...

Actually, this factor was found in stage 2:

GMP-ECM 7.0.5-dev [configured with...
Forum: Miscellaneous Math 2020-07-21, 20:08
Replies: 57
Views: 4,395
Posted By ryanp
Uh oh. What do I have to do with all this?

Uh oh. What do I have to do with all this?
Forum: And now for something completely different 2020-07-05, 19:18
Replies: 19
Views: 5,445
Posted By ryanp
I decided to fire up certification of M78737 with...

I decided to fire up certification of M78737 with Primo, using 64 processes. Hopefully no one else is already running this!

The machine it's running on is a 3Ghz, 36-core/72-thread system. Anyone...
Forum: Factoring 2020-07-05, 02:13
Replies: 780
Views: 55,295
Posted By ryanp
In case anyone is interested, here's the full...

In case anyone is interested, here's the full msieve log for 732541^47-1.

PjYMLaPT
Forum: Factoring 2020-07-04, 17:54
Replies: 780
Views: 55,295
Posted By ryanp
I noticed that as well. Does that file...

I noticed that as well. Does that file auto-update from factordb?
Forum: Factoring 2020-07-04, 10:27
Replies: 780
Views: 55,295
Posted By ryanp
732541^47-1

At long last... the beast is slain!

Fri Jul 3 21:38:12 2020 Msieve v. 1.54 (SVN 1030M)
Fri Jul 3 21:38:12 2020 random seeds: 177225fc d79499b7
Fri Jul 3 21:38:12 2020 factoring...
Forum: Factoring 2020-07-03, 21:37
Replies: 780
Views: 55,295
Posted By ryanp
732541^47-1

LA for 732541^47-1 has completed:

linear algebra completed 42024960 of 42025465 dimensions (100.0%, ETA 0h 0m)
lanczos halted after 164654 iterations (dim = 42025052)
recovered 35 nontrivial...
Forum: Data 2020-06-24, 15:29
Replies: 3,335
Views: 217,355
Posted By ryanp
My doublechecks should be submitted now.

My doublechecks should be submitted now.
Forum: Factoring 2020-06-23, 20:48
Replies: 780
Views: 55,295
Posted By ryanp
CADO "las" siever; -I 16, lpbr=lpba=33. I...

CADO "las" siever; -I 16, lpbr=lpba=33. I collected about 900M unique relations for the final matrix, which ended up being 42M rows/cols.

Msieve v. 1.54 (SVN 1030M)
Tue Jun 23 14:53:19 2020...
Forum: Factoring 2020-06-23, 20:09
Replies: 780
Views: 55,295
Posted By ryanp
732541^47-1

Update: with some more relations and a faster machine, managed to squeeze the LA time for (732541^47-1)/732540 down to ~250hrs.
Forum: Factoring 2020-06-21, 15:01
Replies: 780
Views: 55,295
Posted By ryanp
This number was my white whale...

This number was my white whale (https://en.wikipedia.org/wiki/Moby-Dick) for a long time. Indeed, I believe it hit issues with lasieve producing low yield and we judt couldn't get to enough relations...
Forum: Msieve 2020-06-16, 20:36
Replies: 2
Views: 875
Posted By ryanp
Thanks!

Thanks!
Forum: Msieve 2020-06-16, 19:36
Replies: 2
Views: 875
Posted By ryanp
msieve with GMP 6.2.0

Has anyone successfully compiled and used msieve with the latest GMP release, 6.2.0?

I'm seeing segfaults during relation filtering. Some gdb debugging tracked the problem to the "if" block of...
Forum: Aliquot Sequences 2020-04-24, 21:09
Replies: 97
Views: 14,767
Posted By ryanp
i2140

On i2140 (2 * 3 * c213), I've done a full 50K curves with B1=26e7, and have just started some at B1=29e8; it looks like it might be a tough nut to crack.
Forum: Aliquot Sequences 2020-04-23, 16:02
Replies: 97
Views: 14,767
Posted By ryanp
Factored - hit it on the first dep. Thu Apr...

Factored - hit it on the first dep.

Thu Apr 23 05:37:57 2020 commencing square root phase
Thu Apr 23 05:37:57 2020 reading relations for dependency 1
Thu Apr 23 05:38:02 2020 read 22237486...
Forum: Aliquot Sequences 2020-04-13, 16:15
Replies: 97
Views: 14,767
Posted By ryanp
Managed to get it down even more using some more...

Managed to get it down even more using some more rels and target_density=150...

Msieve v. 1.54 (SVN 1030M)
Sun Apr 12 08:20:16 2020
random seeds: 576e392d b3dd3297
factoring...
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