Info PrimeGrid Challenges 2025

[Skillz]

OK, these have ETAs that could change, as I just updated lasso, but here is the times after changing
View attachment 130085

These tasks grow exponentially fast. 6 days from now those numbers wont mean anything.

 

[StefanR5R]

These tasks grow exponentially fast. 6 days from now those numbers wont mean anything.

Zen 1...2: 16,384 kB/CCX / 6,144 kB/job = 2⅔ concurrent jobs/CCX ≈ 2 concurrent jobs/CCX
Zen 3...5: 32,768 kB/CCX / 6,144 kB/job = 5⅓ concurrent jobs/CCX ≈ 4 concurrent jobs/CCX

1 day later: 7,680 kB/job; and 6 days to go until start of the challenge. The above job counts per CCX will likely be obsolete by then. I am a bit worried how useful Zen 2 will remain during the challenge.

 

[Skillz]

1 day later: 7,680 kB/job; and 6 days to go until start of the challenge. The above job counts per CCX will likely be obsolete by then. I am a bit worried how useful Zen 2 will remain during the challenge.

I think when using AVX512 for these tasks they use more L3. Based on the rate these things are going I don't know, but it's not looking good.

 

[Markfw]

BTW, these use AVX-512 a lot. The Zen 4 8854 is taking ~1.5 hours, and the 9950x is taking ~35 minutes. Thats a lot more than just 3.5-4.6 ghz.



I will try my Turin later and see what times it gets.