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1) Message boards : Number crunching : Badges III (Message 150998)
Posted 180 days ago by numbermaniac
2) Message boards : Number crunching : Badges III (Message 150414)
Posted 258 days ago by numbermaniac


My first Ruby badge :)
3) Message boards : The Riesel Problem : K = 192971 prime found by Propper (Message 150397)
Posted 261 days ago by numbermaniac
Nash Weight is the amount of n's remaining from 100000-110000 after being sieved to p=512.

Out of curiosity what does p = 512 mean here? All prime numbers up to 512? Or the first 512 prime numbers? Or does it mean something else entirely?
4) Message boards : Fermat Divisor Search : Fermat Divisor Search (Message 150128)
Posted 285 days ago by numbermaniac
We are done!
+-------+-----------+--------------+-----------+-----------+-----------+-------------+-------+---------------+------------+---------------+------------------+---------+ | k | count | leading edge | min n | max n | done | in progress | prime | work total | % of total | work done | work in progress | done % | +-------+-----------+--------------+-----------+-----------+-----------+-------------+-------+---------------+------------+---------------+------------------+---------+ | 5 | 42,020 | 8,999,977 | 6,000,055 | 8,999,977 | 42,020 | 0 | 0 | 217,314.77 | 1.84% | 217,314.77 | 0.00 | 100.00% | | 7 | 102,889 | 8,999,992 | 6,000,030 | 8,999,992 | 102,889 | 0 | 0 | 531,421.11 | 4.50% | 531,421.11 | 0.00 | 100.00% | | 9 | 117,377 | 8,999,977 | 4,000,007 | 8,999,977 | 117,377 | 0 | 0 | 471,093.48 | 3.99% | 471,093.48 | 0.00 | 100.00% |


Have the ranges n ≤ 6M (for k = 5 and 7) and n ≤ 4M (for k = 9) already been searched by other projects? I noticed the others start from n = 3.64M which I assume was the stopping point of PPS or PPS Mega, but I don't know about these particular ranges.
5) Message boards : Fermat Divisor Search : Fermat Divisor Search (Message 149381)
Posted 322 days ago by numbermaniac
Looks like there's still about 4500 "in progress" tasks to go until the project is completely done, according to https://www.primegrid.com/stats_div_llr.php.
6) Message boards : The Riesel Problem : K = 192971 prime found by Propper (Message 149341)
Posted 323 days ago by numbermaniac
As for current prime, we decided to concentrate on conjecture itself and stop testing of both this k and his previous discovery


The stats page (https://www.primegrid.com/stats_trp_llr.php) indicates that work generation is still enabled for the 2 k-values. Are they expected to be turned off soon, or are we waiting for something else before doing so?
7) Message boards : Fermat Divisor Search : Fermat Divisor Search (Message 149056)
Posted 335 days ago by numbermaniac
To everyone who's running DIV until it completes, what will you all be switching to once it's over?
8) Message boards : The Riesel Problem : K=2293 reported in top 5k page (Message 148679)
Posted 347 days ago by numbermaniac
We looked at some numbers and reached a decision.

We will continue searching that K up to the prime that was found. It's only 4175 candidates, and at the current pace that's about 2 weeks. So we're adding two weeks to a search that will take many years. It's a drop in the proverbial bucket.


We're certainly not going to reach n = 12.9M in 2 weeks though (we're currently at 11.4M), unless k = 2293 is given full priority and all other k-values are paused until we get there.

The task status page says we're doing about 339 TRP tasks each day; if these 4175 candidates were the only numbers being processed, then yes it would take about 2 weeks. However there's about 47 other k-values also being searched (46 once all the k=9221 work is completed), so those 339 tasks/day are going to be split across all those 47-48 k-values. Roughly speaking that means it could take 82-84 weeks until TRP reaches n = 12.9M, the value of the new T5K prime.

For what it's worth I agree with the decision to keep k = 2293 in the project until we reach that point. I just wanted to provide some clarity to the "2 weeks" estimation.
9) Message boards : Fermat Divisor Search : Fermat Divisor Search (Message 148541)
Posted 351 days ago by numbermaniac
Has there been any discussion whether Primegrid would take a concentrated effort for k*2^n-1, or is that left for solo Riesel Prime search at https://www.mersenneforum.org/showthread.php?t=18255?


For low k-values, many of the ranges are reserved by other people already. For example there's a big table of which k-values < 300 are being searched at https://www.rieselprime.de/ziki/Riesel_k%3D1-300. The "Date" column shows who currently has each value reserved.
10) Message boards : Generalized Fermat Prime Search : "Average CPU time" missing for 16 and 17-Mega in project prefs page (Message 148345)
Posted 357 days ago by numbermaniac
On the project preferences page (https://www.primegrid.com/prefs_edit.php?subset=project), GFN 16 and 17-Mega display a "Recent average GPU time", but not the equivalent average "CPU time".

I'm guessing this is because they used to be unsupported on CPU until the new Genefer update. Now that they are supported again, could someone please add those lines back?

Thank you!



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