M7508981 has at least 12 prime factors(new factor # record) - Page 15

Batalov · 2014-08-30, 15:06

No, not me.

legendarymudkip · 2014-08-30, 17:57

Throwing my cores at some ECM on M7508981, are B1=50000 and 250000 already reserved? In an LMH way, that is, not necessarily on the server.

PageFault · 2014-08-30, 19:17

No problem and don't worry about reservation. I work through the manual system and it hands out ECM to any takers (obviously not many) and the number of curves required permits this behavior.

What bounds might I use for the suggested range? How many curves? I need to test this, but a good approximation is a recent find of an ECM factor for M9178789, in about 150 minutes per curve on a machine a third as fast as my current one.

I have to finish pending assignments but could start on two cores in perhaps two weeks. After that, who knows? I got more cores and like risk ...

Quote:

Originally Posted by pdazzl

Please do, 7508981 is technically reserved on me but feel free to throw ECM at it or anyone else for that matter. I have my i7 doing a bunch of B1=100,000 on it now. You want to hit the 35 digit range?

edit:

The manual system wouldn't give me this, even though it hands out multiple assignments in my current range, M25000, in batches of 15 -20 which I then recombine into a single entry. Perhaps it sense the "official" reservation? Regardless, I can do this the LMH way and eventually get a valid reservation to get banked credit.

I'm ready, need bounds ...

PageFault · 2014-08-31, 01:03

A little tomfoolery ...

I grabbed M7500049 and it runs at 81 minutes per curve, using a maximum of 8142 MB ram in Stage 2 (more was offered, she didn't bite).

Yikes! The performance delta is awesome. On a workbox, HP blandware i3 3.4 GHz, similar work takes 160 minutes. Now running is i5 4690 (why does the client report the speed as 3255 instead of the detected 3500??). Ram is HyperX 1600 cl10, 16 GB. All at stock on Asus Z87 Pro (I haven't looked under the hood yet).

I get a huge performance hit, with this ECM running, on my LL tests, 2 running in M69xxxxxx range: 20 % slower! Yikes! I see in the output for the ECM:

FMA3 FFT length 384k, Pass 1 = 256, Pass 2 = 1536

whereas I normally have 2 cores running much smaller ECM (the void), but these (M25xxx) show the line:

FMA3 FFT length 1280k

Anyways, the LL will be done in the next few weeks and I don't want any more at this time. Hence, two cores on some of this potentially interesting work and the other two "in the void", where I have found a dismal 1 factor in about 35 000 curves.

Ahh grasshopper, computer performance ... I recall the Age of AMD, and my Axia's running at 1400 +, even prime95 stable ... this Haswell might outwork one of those in a week, compared to a full year. Back then, we were doing M13xxxxxx and TF was at M15xxxxxx. What a difference a decade and a half makes ...

PageFault · 2014-08-31, 01:11

You might increase B2 to 5000000 - this is the logic on the server: B2 = 100 x B1.

Quote:

Originally Posted by legendarymudkip

Throwing my cores at some ECM on M7508981, are B1=50000 and 250000 already reserved? In an LMH way, that is, not necessarily on the server.

pdazzl · 2014-08-31, 02:14

Quote:

Originally Posted by PageFault

No problem and don't worry about reservation. I work through the manual system and it hands out ECM to any takers (obviously not many) and the number of curves required permits this behavior.

What bounds might I use for the suggested range? How many curves? I need to test this, but a good approximation is a recent find of an ECM factor for M9178789, in about 150 minutes per curve on a machine a third as fast as my current one.

I have to finish pending assignments but could start on two cores in perhaps two weeks. After that, who knows? I got more cores and like risk ...

edit:

The manual system wouldn't give me this, even though it hands out multiple assignments in my current range, M25000, in batches of 15 -20 which I then recombine into a single entry. Perhaps it sense the "official" reservation? Regardless, I can do this the LMH way and eventually get a valid reservation to get banked credit.

I'm ready, need bounds ...

Could you do a B1 between 800000 - 1000000? B2 being 100x of this

pdazzl · 2014-08-31, 02:16

Quote:

Originally Posted by legendarymudkip

Throwing my cores at some ECM on M7508981, are B1=50000 and 250000 already reserved? In an LMH way, that is, not necessarily on the server.

Sure feel free to do B1=50000 B2=5000000

You'll have to setup work todo manually

kracker · 2014-08-31, 02:53

Quote:

Originally Posted by pdazzl

Could you do a B1 between 800000 - 1000000? B2 being 100x of this

I'm starting as well, doing B1=900000 if that's not taken.

How many curves?

kracker · 2014-08-31, 04:09

Quote:

Originally Posted by pdazzl

Go for it, I'm done done factoring on it. I TF'd it up 69.

Hmm?

Batalov · 2014-08-31, 06:32

Quote:

Originally Posted by kracker

Hmm?

1583285088503372039 = 60071849 · 26356523311 ?

legendarymudkip · 2014-08-31, 08:44

Quote:

Originally Posted by PageFault

You might increase B2 to 5000000 - this is the logic on the server: B2 = 100 x B1.

I know, I meant B1=50000 and B1=250000.

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2014-08-30, 15:06	#155
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 242F₁₆ Posts	No, not me.

2014-08-30, 17:57	#156
legendarymudkip Jun 2014 78₁₆ Posts	Throwing my cores at some ECM on M7508981, are B1=50000 and 250000 already reserved? In an LMH way, that is, not necessarily on the server.

2014-08-31, 01:03	#158
PageFault Aug 2002 Dawn of the Dead 5×47 Posts	A little tomfoolery ... I grabbed M7500049 and it runs at 81 minutes per curve, using a maximum of 8142 MB ram in Stage 2 (more was offered, she didn't bite). Yikes! The performance delta is awesome. On a workbox, HP blandware i3 3.4 GHz, similar work takes 160 minutes. Now running is i5 4690 (why does the client report the speed as 3255 instead of the detected 3500??). Ram is HyperX 1600 cl10, 16 GB. All at stock on Asus Z87 Pro (I haven't looked under the hood yet). I get a huge performance hit, with this ECM running, on my LL tests, 2 running in M69xxxxxx range: 20 % slower! Yikes! I see in the output for the ECM: FMA3 FFT length 384k, Pass 1 = 256, Pass 2 = 1536 whereas I normally have 2 cores running much smaller ECM (the void), but these (M25xxx) show the line: FMA3 FFT length 1280k Anyways, the LL will be done in the next few weeks and I don't want any more at this time. Hence, two cores on some of this potentially interesting work and the other two "in the void", where I have found a dismal 1 factor in about 35 000 curves. Ahh grasshopper, computer performance ... I recall the Age of AMD, and my Axia's running at 1400 +, even prime95 stable ... this Haswell might outwork one of those in a week, compared to a full year. Back then, we were doing M13xxxxxx and TF was at M15xxxxxx. What a difference a decade and a half makes ...