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1) Message boards : Number crunching : Tour de Primes 2021 (Message 148898)
Posted 4 days ago by Profile Chooka
Ooh. I think I see the winner of the poker dot jersey!
2) Message boards : Number crunching : Tour de Primes 2021 (Message 148896)
Posted 4 days ago by Profile Chooka
30.1 here with the air con on.
Its supposed to be 34 in Brisbane on Monday. (93.2F)
3) Message boards : Number crunching : Tour de Primes 2021 (Message 148894)
Posted 4 days ago by Profile Chooka
Just scrapped in there Vaughan! :D

4) Message boards : Number crunching : Tour de Primes 2021 (Message 148880)
Posted 5 days ago by Profile Chooka
I just looked at my recent 1st %, wow, some people are really throwing more threads at PPSE to increase 1st rate for mountain stage.

I consider a 4 GHz Intel core to be my reference point as I have many systems around that, and that is running around 30-40% first at the moment. Outside of mountain stage it was nearer 50%.

In a quick test on one system, 2t increases unit speed by 38%. With ideal scaling that should be 100%. Throughput is lowered to 69% compared to one thread per task. Similarly for 4t it is 2.16x the speed (ideally 4x) for a throughput of about 54%. Not great tradeoffs either way.


Yep. My 1st rate has plummeted. 4t on my3950x went from 60ish % down to 41%!
My poor old Vega 56’s on GFN16 has dropped down to 36% lol. Radeon VII’s now at 50%.

Oh well... it was expected. Given I’ve been crunching my butt off since the start of the challenge, I wasn’t expecting anything in the mountain stage anyway.
5) Message boards : Number crunching : Tour de Primes 2021 (Message 148840)
Posted 5 days ago by Profile Chooka
LOL! I never thought people would bunker work for the mountain stage.
Hilarious :D
Fingers crossed one of my PPS MEGA's in the pipeline get lucky.
6) Message boards : Number crunching : Tour de Primes 2021 (Message 148825)
Posted 6 days ago by Profile Chooka
This would make for an interesting vote.

I'd vote for a March trial. It's stinking hot in Australia during Feb. It's ok for those in the northern hemi with it being winter though.
What are the downsides to having it in March?
7) Message boards : Number crunching : Tour de Primes 2021 (Message 148812)
Posted 6 days ago by Profile Chooka
It's Feb because 2 is prime.

If doing a challenge or other event doesn't suit one's circumstance, due to weather or any other factor, one is free to omit this from their annual plan & join us at a time more to their convenience.

I hope that didn't sound too pretentious.

I'll see your 2 and raise you another. March (month 3) is prime too!

Not at all pretentious, just a case of tradition trumping logic.

Those 2 or 3 more days of crunching would come in handy. CPU renters are probably paying for 30 day periods rather than 28, and people who rent GPUs would gladly pay for the extra 48 to 72 hours for 10% more time to earn those coveted TdP badges. Actually, we would all appreciate 10% more time for this.

Just saying, PG may have more intense participation in March than in February for a variety of reasons, badges being the reason that's intrinsic to PG.


Again I think you make great points.
8) Message boards : Number crunching : Tour de Primes 2021 (Message 148804)
Posted 7 days ago by Profile Chooka
I suggest that we move TdP to March next year.
We will have more days in the month to crunch.

Plus there are real-world benefits. Some people don't want to do heavy crunching during the warmest months because the air conditioning is costly. March is more of a shoulder season everywhere, including the tropics (it starts to get really hot in April at 15 deg N latitude; but PG has few users at that latitude).

February this year happens to be the worst month on record in Texas. It's so cold and there's so much snow that there is 20,000 MW of unserved load (rotating blackouts) because they couldn't start the peaking generators. The natural gas generators there are not housed in buildings and they froze. The spot price of wholesale power there climbed to over US$1/kWh. I cringe to think of the retail price of power, if you can get it.

EDIT: On Monday, when the rotating blackouts began, wholesale power was is the range of US$3000 to US$6000 per MWh, so US$3 to US$6 per kWh. In 14 other states in the Southwest Power Pool, the wholesale price of power was often around US$1500/MWh.


Certainly merit here.
Feb is one of the hottest months here in Australia. I shut down my GPU's to offset the air con for Dec, Jan. The only reason I've fired them up is for this challenge.
I've had to battle the argument from the wife too...... Nice cool 24 degrees with the air con on and 30 degrees blasting out of my study LOL.
I couldn't even run many MEGA tasks because it was too hot. Fortunately in the last few days it's cooled down a bit and the air con is off.

Of course those that rent their crunchers won't care when the comp is on though. One of the pro arguments for being a renter.
9) Message boards : Number crunching : Tour de Primes 2021 (Message 148803)
Posted 7 days ago by Profile Chooka
What a difference a year makes.

In TdP 2020, we found 44 mega primes. All were less than two million digits. And February had an extra day last year.

Today is the 17th. Including some primes that aren't visible yet, there's at least 39 mega primes, three of which are above two million digits, and one is over three million digits.



Maybe we can thank AMD for contributing there. Making higher core count CPU's more affordable and forcing Intel to do the same and bring prices down.

The introduction of LLR2 has been great as well! No more having to compete against those with the latest & greatest hardware. An old quad core now has half a chance for the owner to claim a MEGA! (GPU tasks stay the same though unfortunately :) )
10) Message boards : Number crunching : Tour de Primes 2021 (Message 148644)
Posted 10 days ago by Profile Chooka
Server issues?


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