I haven't decided whether I want to tackle my next largest composite or go for a "more wanted", but if someone can find a really nice poly for this one, [URL="http://factordb.com/sequences.php?se=1&aq=7044&action=last20&fr=0&to=100"]7044[/URL]:i3426.c159:[code]132849801556061831314309873822050317788619462490949245156896198056485583983802960449476380694570581312461543888860167332690420786216424942137403018401845810663[/code]I'll do the more wanted.

I'll have a go at schickel's C160. I'll only scan a limited range of HLQs, but enough to test my scripts, and the new PSU.

Chris

I didn't get far. After about 27 minutes the system crashed again. This time the PSU survived so I could power the system back up. Running npr on the best 100 entries in msieve.dat.ms found: [code]
R0: -15595511478358973801530755477526
R1: 6316360635713693
A0: 2096409315900123991624591017294407684793
A1: -21208160729383271288378383776159
A2: -79287985949944664147956451
A3: 2064769571596254311
A4: 249346723154
A5: 144
skew 19821182.17, size 1.713e-15, alpha -6.031, combined = 1.539e-12 rroots = 5
[/code]
I think it needs more fans to pump the head from the GPU out. But that will take some time to set up,

Chris

[QUOTE=chris2be8;365932]I didn't get far. After about 27 minutes the system crashed again. This time the PSU survived so I could power the system back up. Running npr on the best 100 entries in msieve.dat.ms found: [code]
R0: -15595511478358973801530755477526
R1: 6316360635713693
A0: 2096409315900123991624591017294407684793
A1: -21208160729383271288378383776159
A2: -79287985949944664147956451
A3: 2064769571596254311
A4: 249346723154
A5: 144
skew 19821182.17, size 1.713e-15, alpha -6.031, combined = 1.539e-12 rroots = 5
[/code]
I think it needs more fans to pump the hea[t] from the GPU out. But that will take some time to set up,

Chris[/QUOTE]That's a pretty nice score. I'll run some searching locally and see if I can find anything better. If not, I might go ahead and tackle this one next (5 days or so to go on my current job).

My upcoming jobs above c150 are c154, [c159], and c164. (And I'm not real sure I'm up to tackling a c164 again....

I've concluded that EVO Labs PSUs don't always provide their full rated power. Another try killed the 700W model I'd replaced the original 500W PSU with. The GPU uses 170W max, but mostly 12v power which the PSU may not be able to provide enough of.

I've replaced it with a Corsair CX750 PSU. That's rated to provide up to 62 amps of 12v power, which should be plenty. But it cost nearly as much as the GPU (that was second hand though).

I'm running another soak test against your C160. If the new PSU survives that it should survive anything. I'll post the best poly it finds.

This has definitely reached "frustrating". PSUs are supposed to either provide their rated power or have overload protection to stop them being damaged.

Chris

[QUOTE=chris2be8;366027]I've concluded that EVO Labs PSUs don't always provide their full rated power. Another try killed the 700W model I'd replaced the original 500W PSU with. The GPU uses 170W max, but mostly 12v power which the PSU may not be able to provide enough of.

I've replaced it with a Corsair CX750 PSU. That's rated to provide up to 62 amps of 12v power, which should be plenty. But it cost nearly as much as the GPU (that was second hand though).

I'm running another soak test against your C160. If the new PSU survives that it should survive anything. I'll post the best poly it finds.

This has definitely reached "frustrating". PSUs are supposed to either provide their rated power or have overload protection to stop them being damaged.

Chris[/QUOTE]Wow, something to keep in mind for the next system I build. I had a PS go in my main system; luckily, when I ordered a replacement, they had one with a higher rating on sale cheaper than the rating I replaced.

some PSU are certified. no-name PSU and low quality can deliver between 70- to 75% of their nominal power. Certified PSU have better rate. Also a small link.

[url]http://www.tomshardware.co.uk/forum/267343-28-explain-bronze-silver-certified-silvers-best[/url]

Run finished. Best poly was: [code]
R0: -6364655919201796079867797099408
R1: 295615254460640777
A0: -179435110610878523647136682144480120081
A1: -75945269806551158820034767590206
A2: 38100445529483857085112451
A3: 7411823563051778744
A4: -537302487308
A5: 12720
skew 7801224.82, size 2.517e-15, alpha -7.009, combined = 1.985e-12 rroots = 3
[/code]
That was searching leading coefficients from 1 to 20000 (in two stages) and running npr on the best 1000 stage 1 hits.

I'm now happy that the new PSU can cope. "All" I have to do is learn how to tune polynomial selection for best results on various size inputs.

Chris

[QUOTE=chris2be8;366105]Run finished. Best poly was: [code]
R0: -6364655919201796079867797099408
R1: 295615254460640777
A0: -179435110610878523647136682144480120081
A1: -75945269806551158820034767590206
A2: 38100445529483857085112451
A3: 7411823563051778744
A4: -537302487308
A5: 12720
skew 7801224.82, size 2.517e-15, alpha -7.009, combined = 1.985e-12 rroots = 3
[/code]
That was searching leading coefficients from 1 to 20000 (in two stages) and running npr on the best 1000 stage 1 hits.

I'm now happy that the new PSU can cope. "All" I have to do is learn how to tune polynomial selection for best results on various size inputs.

Chris[/QUOTE]Thanks. I could not find a higher one after a couple of days of CPU search, so I'm going to start working with this one in the next week or so.

AS4788:i5212 - C158
 

Looks like Aliquot Sequence 4788 is ready for GNFS with a C158.

The last term is [URL="http://www.factordb.com/sequences.php?se=1&aq=4788&action=range&fr=5212&to=5212"]here[/URL].

And the number is:
[CODE]76869571906355491906959871188888092471250708894766586952516503475089113869342318053568967454050390052064136129541897584223796694069753683292240241556441311641[/CODE]A nice poly is requested.

I'll give the C152 from 4788 a 2-GPU-day shot. Coeff 3.6M and 4.7M start points.
This size number deserves about a GPU-week, so someone else should have a run also.
-Curtis