mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.45 seconds.
Search: Posts Made By: ewmayer
Forum: News 2021-05-17, 20:20
Replies: 10
Views: 1,898
Posted By ewmayer
I'm able to log in to e.g. amazon.co.uk and...

I'm able to log in to e.g. amazon.co.uk and amazon.de using same credentials as my usual US account - in fact I used the UK site just last week to order a used copy of an only-released-for-Region-2...
Forum: News 2021-05-17, 03:10
Replies: 10
Views: 1,898
Posted By ewmayer
I see it available in the UK...

I see it available in the UK (https://smile.amazon.co.uk/), so try prepending 'smile.' to whichever usual link you use for your country.
Forum: GPU to 72 2021-05-14, 22:36
Replies: 13
Views: 1,960
Posted By ewmayer
(Somehow missed this when PaulU OPed it:) ...

(Somehow missed this when PaulU OPed it:)



Ha! Real men (a.k.a. execrable masochists) factor numbers like this using the world's slowest bignum code - I mean of course *nix 'bc', which IIRC...
Forum: Mlucas 2021-05-11, 20:10
Replies: 25
Views: 2,099
Posted By ewmayer
How much RAM are you getting in your iMac? I...

How much RAM are you getting in your iMac? I really dislike the lack of RAM-expandability in the M1-based Apple offerings, as detailed in articles like this:

Theoretically, you can upgrade RAM &...
Forum: Mlucas 2021-05-10, 21:10
Replies: 25
Views: 2,099
Posted By ewmayer
Hi, Bayanne - tdulcet and danc2 have put together...

Hi, Bayanne - tdulcet and danc2 have put together a very nice auto-install-and-tune script, but that is alas Linux-only. But a simple DIY command-line build for Arm-based iMac is straightforward,...
Forum: Hardware 2021-05-07, 20:37
Replies: 172
Views: 23,414
Posted By ewmayer
I updated the current-prices table in my post...

I updated the current-prices table in my post above to add the officially supported 2133 DIMMs - as with 2400, the current sweet spot is at 16GB, one could buy 6 of those and thus max out the memory...
Forum: Hardware 2021-05-01, 21:43
Replies: 172
Views: 23,414
Posted By ewmayer
Of possible interest to our UK readers, a cheap...

Of possible interest to our UK readers, a cheap refurb 68C/272T 7250 KNL (https://www.ebay.com/itm/Intel-Xeon-Phi-7250-68-Core-272-Thread-CPU-Knights-Landing-/224307986087).

Priced some RAM...
Forum: Hardware 2021-04-18, 23:04
Replies: 80
Views: 2,881
Posted By ewmayer
Re. Hot-air-blowing: [hot by human standards] !=...

Re. Hot-air-blowing: [hot by human standards] != [hot by chipset standards].

The 2nd Radeon 7 GPU I added to my old ATX-case Haswell system (all case fans long-ago kaput, ventilation all via...
Forum: Hardware 2021-04-10, 23:02
Replies: 80
Views: 2,881
Posted By ewmayer
Less of a problem for Mike than most - he pays...

Less of a problem for Mike than most - he pays 1/3 as much for electricity in backwater Arkansas than I do in high-tech/woke/green/blahblah California.
Forum: Hardware 2021-04-04, 20:58
Replies: 15
Views: 545
Posted By ewmayer
Perhaps CADO-NFS, much like the GIMPS p-1...

Perhaps CADO-NFS, much like the GIMPS p-1 clients, is querying the system for available RAM and using some large fraction of that for efficiency reasons. Does the program have the equivalent of a...
Forum: PrimeNet 2021-04-02, 20:32
Replies: 6
Views: 1,080
Posted By ewmayer
A more interesting question is what the server...

A more interesting question is what the server does with the following kind of thing: A p-1 run found the following factor of M(109228331): 67043584777242522312784510096836476580550779917618449.
...
Forum: Software 2021-03-15, 20:07
Replies: 14
Views: 658
Posted By ewmayer
Table-lookup param-selection is coded up. Of the...

Table-lookup param-selection is coded up. Of the various curve-fits tried, polynomials seem ill-suited since the whole point of curve-fitting is to achieve significant data compression, by accurately...
Forum: Software 2021-03-14, 22:08
Replies: 14
Views: 658
Posted By ewmayer
I've uploaded a revised set2.txt with the...

I've uploaded a revised set2.txt with the duplicate at x = 25 removed. I probably have Excel-something on one of my Linux boxes, but can't afford more hours dicking around learning the basics of yet...
Forum: GPU Computing 2021-03-14, 03:33
Replies: 365
Views: 69,722
Posted By ewmayer
Winning bid was $1226 and change - I wonder if...

Winning bid was $1226 and change - I wonder if the seller actually ends up getting paid.

Based on the ad wording, seems like a genuine gamer-with-a-gripe taking out his frustrations in a creative...
Forum: Software 2021-03-13, 21:14
Replies: 14
Views: 658
Posted By ewmayer
I was curious whether any nonlinear curve-fit...

I was curious whether any nonlinear curve-fit software readers brought to bear would be able to take the partial point sets - complete at the left end, where the 'action' is, then just a far-right...
Forum: Software 2021-03-12, 23:11
Replies: 14
Views: 658
Posted By ewmayer
Nonlinear curve fits needed

I am working on adding p-1 factoring support to Mlucas v20 - This is related to choosing optimal Stage 2 parameters. I have 2 (x,y)-point datasets for which I need high-quality nonlinear curve fits....
Forum: Cloud Computing 2021-03-09, 20:53
Replies: 78
Views: 5,183
Posted By ewmayer
Possible issue - how to handle savefile...

Possible issue - how to handle savefile incompatibility between client versions? This is not just an issue for gpuowl, but I got dinged by it when I upgraded my build of that client on one of my...
Forum: PrimeNet 2021-03-08, 21:43
Replies: 15
Views: 753
Posted By ewmayer
Ah, you're doing 100Mdigit work - I don't know...

Ah, you're doing 100Mdigit work - I don't know what the default p-1 protocol for those is supposed to be. PMing George to see if he can clarify.
Forum: PrimeNet 2021-03-08, 20:21
Replies: 15
Views: 753
Posted By ewmayer
Which program are you using? If gpuowl, it's been...

Which program are you using? If gpuowl, it's been doing a combined p-1 stage 1 and first-few-%-of-PRP since v7. That means that such a run starts out looking like a PRP, but the first few Miterations...
Forum: Mlucas 2021-03-08, 20:01
Replies: 1
Views: 360
Posted By ewmayer
M107353937 proved a bit too large to handle @5.5M...

M107353937 proved a bit too large to handle @5.5M FFT, even with the newly-reinstated HIACC carry code - here are the ROEs > 0.4375 hit in the first half-million iterations (I omit the 0.4375 ones,...
Forum: Mlucas 2021-03-07, 23:51
Replies: 1
Views: 360
Posted By ewmayer
Mlucas v20: Preview of coming detractions, or something :)

As I've noted elsewhere, v20 will have p-1 factoring support as its major feature add, with some details such as "fused p-1 stage 1 and PRP testing?" not yet finalized. (PRP-proof support will be in...
Forum: Software 2021-03-07, 21:50
Replies: 21
Views: 1,737
Posted By ewmayer
George, when doing e.g. PRP-testing and p-1 stage...

George, when doing e.g. PRP-testing and p-1 stage 1 we need to be able to include a small constant integer multiplier like 3 in the round-and-carry-step anyway, yes? Here some simple sample code from...
Forum: GPU Computing 2021-03-07, 20:30
Replies: 10
Views: 1,473
Posted By ewmayer
Oh, but reducing functionality after you buy...

Oh, but reducing functionality after you buy their product is exactly what various companies are already doing - for instance Apple is notorious for this...
Forum: Hardware 2021-03-05, 21:27
Replies: 172
Views: 23,414
Posted By ewmayer
Thanks, though as usual I needed reading glasses....

Thanks, though as usual I needed reading glasses. :)

My own rule of thumb for manycore-system runs is to go with whichever combo has the fewest #workers and yields at least 95% of the maximum...
Forum: Hardware 2021-03-05, 20:37
Replies: 15
Views: 1,704
Posted By ewmayer
I can only speak for the Radeon VII numbers, for...

I can only speak for the Radeon VII numbers, for which that page's ~300GHz-D/D are just over half the ~500GHz-D/D I get from each of my R7's, running underclocked (sclk=3) and pulling ~200W/GPU.
...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 00:10.

Wed May 19 00:10:50 UTC 2021 up 40 days, 18:51, 0 users, load averages: 1.74, 1.64, 1.53

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.