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drummers-lowrise
1) Message boards : Number crunching : Public weak account keys? (Message 158227)
Posted 2 hours ago by Profile composite
Pretty much unanimous, from the sample that responded. Fair enough.

I'll throw the remaining time on this cloud V100 + 8 thread AVX-512
at a DYFL & SOB task on my own account.

I don't wanna pay $1320 a month for this monster;
so it's costing 40% more per hour with an hourly rate.

I received a credit of $270 for signing up for a cloud account.
Less than a day of computing left on that amount.
2) Message boards : Number crunching : Public weak account keys? (Message 158215)
Posted 13 hours ago by Profile composite
How about making weak account keys public on every user page?
Then if anyone is feeling charitable they can contribute crunching
anonymously to whomever they like.

I suppose the same thing could be accomplished by having a sticky
forum where people post their weak account key and credit goals.
The problem with that is that some people could mistakenly post their
main account key instead of the weak account key.
3) Message boards : Wieferich and Wall-Sun-Sun Prime Search : End of WW Project - 30 day notice (Message 158205)
Posted 1 day ago by Profile composite
Don't be frustrated. Generally the credit is already yours, just not guaranteed.
If all the rest of your tasks worked 100%, then there's no reason to suspect that these last 2 tasks will be invalid.

Yeah there is no point worrying - the project will still be going if the tasks are aborted/time out.
I don't want to jinx anything by mentioning the state of WW tasks my computers have returned.

I'm waiting for 32 tasks to validate.
4) Message boards : Wieferich and Wall-Sun-Sun Prime Search : End of WW Project - 30 day notice (Message 158193)
Posted 1 day ago by Profile composite
I am becoming frustrated with a host that has many WW tasks running - nearly 800.
This host has just aborted half, and yet still has nearly 800 tasks.
I am waiting on 2 tasks to be validated by this host so I can reach my target.
It wouldn't normally be an issue, but with the project about to end.....
Edit: My bad - a quarter of the tasks aborted - that's more reasonable

Don't be frustrated. Generally the credit is already yours, just not guaranteed.
If all the rest of your tasks worked 100%, then there's no reason to suspect that these last 2 tasks will be invalid.
5) Message boards : Number crunching : Ideas for 2023 Challenge Lineup? (Message 158118)
Posted 4 days ago by Profile composite
Lesser known Mathematician: Alexander Abian (January 1, 1923 – July 24, 1999).

http://www.scientificlib.com/en/Mathematics/Biographies/AlexanderAbian.html

Promoted a theory that blowing up the moon would eliminate natural disasters on earth as well as the seasons. Compared himself to Galileo when his theories were criticized.

A 28 day challenge might be appropriate.


Abian should have stuck with math, having such a poor grasp of plate tectonics and astrophysics. How about a one-hour Abian Sprint?

I met D H Lehmer in fall 1979 when as a student I attended a lecture he gave on his work, but I was clueless that he was this famous in the field.
He would be more deserving of a PG challenge.
6) Message boards : Number crunching : Gremlin hunt (Message 158116)
Posted 4 days ago by Profile composite
I just solder the wires straight onto the board!

This solution works wonders for many things. I worked up my
soldering skills when I put together an 8-bit CP/M kit in 1982.

I have a 35 years old clock radio whose AM/FM switch contacts
became unreliable. Rather than fuss with replacing the switch
with a new one, I took out the old switch and soldered a jumper wire
to the FM setting. I'd wager the signal and audio quality are better
now than when the radio was new, and I still use it.

The Spitfire Controls oven controller (ironically) really spits 'fire'.
The one in my oven failed around 2012, and also those of similar
ovens of 2 relatives. After years of use, the relay supplying power
to the oven element becomes less efficient at passing current and the relay
contact heats up, so much that the solder melts under the relay between
the relay pin and the solder pad on the board. It's hard to say whether this
failure is intentional or just sloppy design, I saw web posts describing similar
problems. Anyway, separation of solder from the relay pin leads to arcing,
which in my case cleanly blew off the solder pad, leaving a crater in the board
around the relay pin. The relay manufacturer makes an identical relay with
quick connect terminals on top as well as pins underneath, so it was simple for me
to replace the old relay with this model and route the high power oven element wire,
which normally plugs into a quick connect terminal on the board, directly to the terminal
on top of the new relay. The plug is crimped onto the wire so there was no danger of the
wire separating from the relay if the relay heats up again. This repair extended the life
of my controller board by a few years for the cost of a $3 relay, until something else
failed on this $250 board (a capacitor or IC). This fix only worked for me - the others
who tried fixing their oven were less adept at working on printed circuit boards and they
damaged their board irreparably. Maybe they just wanted an excuse to buy a new oven.

Seemingly, electronics are more reliable than electromechanical controls with moving parts, but
complex systems have so many things that can go wrong that they can have shorter lifetimes.
7) Message boards : Number crunching : Gremlin hunt (Message 158074)
Posted 4 days ago by Profile composite
I haven't fully read this thread.
Be very careful of the new 12 pin power to the 40 series and I think AMD too.
It is very not good.
Get the cables that already have the bend - an extra purchase - or make sure you bend the cables before placing in the GPU AND have a wide case.
Edit: I am so annoyed - what was wrong with having 3 of the previous 6 pin instead of 2? Expletives.
All PCI-E plugs are rubbish. Those tiny pins can't take 150W at 12V, no matter what the specs say. The pins quickly tarnish and drop voltage and the card crashes.

It's obvious they screwed up when you look at 6 pin rated 75W and 8 pin rated 150W. Double the power through 1.5x the pins? No.

This is the reason that fingers on slots and cards are gold plated.
But swapping cards in and out of slots many times scratches through the gold film.
Maybe you should use power plugs with gold-plated pins?
The extra cost of gold plated pins pales in comparison with the GPU's cost.
8) Message boards : General discussion : Off-topic branching (Message 158050)
Posted 5 days ago by Profile composite
..."helium in its core all that time. More than half of the hydrogen has been used up already, in the core, so the Sun is about middle-aged. The solar model can be traced in time from an initial composition through to its present age. As the composition changes due to using up the hydrogen, the other parameters of the Sun such as its radius, temperature, and luminosity must change as well. According to the figure below, the solar radius has increased by"...

Etc etc.

OK, wrong question (because there is no hydrogen at the centre, density is 0).
This could be used as a trick question on an astrophysics test.

So then how does one calculate the density of helium at the centre of the Sun?
9) Message boards : General discussion : Off-topic branching (Message 158046)
Posted 6 days ago by Profile composite
How does one calculate the density of hydrogen at the centre of the Sun?
10) Message boards : Wieferich and Wall-Sun-Sun Prime Search : End of WW Project - 30 day notice (Message 157978)
Posted 10 days ago by Profile composite
I'm trying to reach a Sapphire badge, with 369 tasks to go.
I expect to hit that goal in 10 days.


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