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Forum: CADO-NFS 2020-08-11, 00:19
Replies: 21
Views: 2,650
Posted By VBCurtis
Same way Greg does- the supercomputing grids used...

Same way Greg does- the supercomputing grids used by the CADO team for these factorizations can handle jobs such as a matrix distributed over many nodes. The paper includes a summary of the number...
Forum: Alberico Lepore 2020-08-10, 18:39
Replies: 11
Views: 531
Posted By VBCurtis
Right, that's how we mean it too- "last" means...

Right, that's how we mean it too- "last" means "there will not be one after this one," or "chronologically final."

Your equations don't factor anything, let alone RSA. You don't know how to...
Forum: CADO-NFS 2020-08-10, 16:35
Replies: 21
Views: 2,650
Posted By VBCurtis
This paper also exhibits the factors of RSA-250!!...

This paper also exhibits the factors of RSA-250!!
Parameters were nearly the same as for RSA-240, except for increasing sieve region from A=32 to A=33 (a doubling of sieve area, equivalent to using...
Forum: Math 2020-08-09, 03:51
Replies: 11
Views: 309
Posted By VBCurtis
False- if you know TF was done to 82 bits, you...

False- if you know TF was done to 82 bits, you know to not bother with ECM at the 20-digit level, nor at the 25-digit level. Skip right to T30 (B1=25e4).

Similar conclusions can be made about TF...
Forum: CADO-NFS 2020-08-09, 03:42
Replies: 112
Views: 2,275
Posted By VBCurtis
I think 1.93 is an excellent idea. mfb0=59...

I think 1.93 is an excellent idea.
mfb0=59 should produce a slightly larger matrix than 58, since more of the relations will have a largest-bit large prime. Sieving a few more relations should...
Forum: CADO-NFS 2020-08-04, 05:03
Replies: 112
Views: 2,275
Posted By VBCurtis
I view mfb and lambda both as methods to control...

I view mfb and lambda both as methods to control the amount of wasted cofactor-splitting. For reasons unclear to me, CADO runs quite a bit faster (in extensive testing at 100-140 digits) with mfb...
Forum: CADO-NFS 2020-08-04, 00:44
Replies: 112
Views: 2,275
Posted By VBCurtis
That's odd, and means I likely don't understand...

That's odd, and means I likely don't understand what lambda does. I thought it was a finer control on mfb, specifically that mfb0 would be lambda0 * lpb0. But 31 * 1.88 is 58.28, meaning mfb0 of 58...
Forum: NFS@Home 2020-07-31, 15:15
Replies: 60
Views: 5,396
Posted By VBCurtis
Thanks! As a first effort, it went OK; hindsight...

Thanks! As a first effort, it went OK; hindsight shows that I started CADO at too low a Q (5M), leading to lots more duplicate relations than typical. The C197 from Aliq3366 started at Q=20M, and...
Forum: NFS@Home 2020-07-31, 00:18
Replies: 60
Views: 5,396
Posted By VBCurtis
The Kosta C198 has built a matrix: 50.6M at TD...

The Kosta C198 has built a matrix: 50.6M at TD 128. ETA on 12 cores of idle Haswell-Xeon is 1075 hr, using 36GB (according to top).
I don't imagine it will remain idle, so it'll be 8 weeks or so to...
Forum: Factoring 2020-07-30, 15:10
Replies: 8
Views: 280
Posted By VBCurtis
Consider the information you have before starting...

Consider the information you have before starting ECM versus the information you have after 1000 curves at B1=50k.

Before ECM, you have whatever TF data there is to tell you no factors below e..g...
Forum: Factoring 2020-07-30, 15:03
Replies: 8
Views: 280
Posted By VBCurtis
You're welcome to manually set your ECM runs to...

You're welcome to manually set your ECM runs to 250k in that range; the server will convert them to a sort-of-equivalent number of 50k curves for the running tally.

While it won't change your...
Forum: NFS@Home 2020-07-29, 18:46
Replies: 60
Views: 5,396
Posted By VBCurtis
Thanks! That works. :) I mistyped the...

Thanks! That works. :)
I mistyped the username on my first try, so the http flags may have worked too.
Forum: Soap Box 2020-07-29, 18:40
Replies: 69
Views: 1,171
Posted By VBCurtis
Since you insert your opinion into pretty much...

Since you insert your opinion into pretty much every thread on this forum, educating *you* contributes to the quality of the forum. That's what multiple users are attempting here, but it's surely...
Forum: NFS@Home 2020-07-29, 18:29
Replies: 60
Views: 5,396
Posted By VBCurtis
Thanks, but downloading from NFS@home requires...

Thanks, but downloading from NFS@home requires authentication. I was hoping for guidance about the correct flags to use for that (FTP vs HTTP, etc).
I tried --http-user and --http-password with the...
Forum: NFS@Home 2020-07-29, 17:18
Replies: 60
Views: 5,396
Posted By VBCurtis
Could someone remind me of the proper invocation...

Could someone remind me of the proper invocation of wget for a topped-off relations file? I prefer to not re-download 50GB for the add'l 30M new relations.
Forum: GPU to 72 2020-07-26, 19:41
Replies: 4,964
Views: 218,075
Posted By VBCurtis
If we previously really should have been going to...

If we previously really should have been going to 78, shouldn't we now reallyshould go to 77? The LL test work is not quite cut in half because of CERT work, so we should move down less than one...
Forum: Hardware 2020-07-26, 14:58
Replies: 26
Views: 1,036
Posted By VBCurtis
What have you run on it?

What have you run on it?
Forum: Hardware 2020-07-23, 22:09
Replies: 26
Views: 1,036
Posted By VBCurtis
If I understand Phi correctly, the chip linked in...

If I understand Phi correctly, the chip linked in the first post is on a PCI card and needs a special compiler and/or OS, while the system GIMPS purchased was the sole CPU on a motherboard and ran a...
Forum: Cunningham Tables 2020-07-22, 22:04
Replies: 186
Views: 15,178
Posted By VBCurtis
Fine with me- we're not in a big hurry to grab a...

Fine with me- we're not in a big hurry to grab a 201-202 for a 15e/home-CADO hybrid.
I wager there's less than 10% chance anymore of msieve finding a winning poly for a composite at 200+ digits. I...
Forum: Lounge 2020-07-20, 22:05
Replies: 1,004
Views: 54,760
Posted By VBCurtis
Winner, Mark! Thanks for the laugh.

Winner, Mark!
Thanks for the laugh.
Forum: Riesel Prime Search 2020-07-18, 05:12
Replies: 27
Views: 4,925
Posted By VBCurtis
Read the definition of Nash weight. Apply it.

Read the definition of Nash weight. Apply it.
Forum: Aliquot Sequences 2020-07-16, 02:42
Replies: 400
Views: 17,788
Posted By VBCurtis
Excellent! Be my guest. Also, I'd like to...

Excellent! Be my guest.

Also, I'd like to reserve 13^60 up to 13^78. I'll start them next week.
Forum: chalsall 2020-07-15, 20:43
Replies: 35
Views: 682
Posted By VBCurtis
Take your 21" 1920 screen and double all...

Take your 21" 1920 screen and double all measurements: 42" 3840 screen. I don't think a 49" would be better than a 43" for monitor use- I'd rather add sharpness than size if I were trying to use a...
Forum: NFS@Home 2020-07-14, 08:08
Replies: 380
Views: 22,512
Posted By VBCurtis
You misunderstood- I said a lower TD would take...

You misunderstood- I said a lower TD would take less than an hour MORE than TD 120. I made no promises about how long the whole job would take!! (How could I, since I don't know your hardware?)
...
Forum: Aliquot Sequences 2020-07-14, 08:01
Replies: 400
Views: 17,788
Posted By VBCurtis
Well, I've been working in spurts on n=13 for a...

Well, I've been working in spurts on n=13 for a couple of years. I have reserved only up to 13^60, but I do plan to cover all of it and I've just 2 sequences left to begin in my reservation to...
Showing results 1 to 25 of 1000

 
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