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Author Topic: [XPM] [ANN] Primecoin High Performance | HP14 released!  (Read 397576 times)
mikaelh (OP)
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December 14, 2013, 09:49:00 AM
 #2381

I updated the FAQ in my first post a bit. Most importantly I added the revised blocks/day formula there.

The revised formula is:
blocks/day = chains/day * (1 - fracDiff + 0.035)

Note that the old formula is still used in many places like the bot on Freenode and Anty's website.
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Trillium
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December 15, 2013, 12:28:59 PM
 #2382

I hope you're all enjoying your new chainsperday values  Grin

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mikaelh (OP)
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December 15, 2013, 12:39:32 PM
 #2383

Yup, the Primecoin network has finally reached difficulty 10. Chains/day values should be about 27 times lower now. This is to be expected because chains/day is now trying to predict how many 10-chains will be found.
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December 15, 2013, 12:43:35 PM
 #2384

Yup, the Primecoin network has finally reached difficulty 10. Chains/day values should be about 27 times lower now. This is to be expected because chains/day is now trying to predict how many 10-chains will be found.

Because the fractional component in diff 10 is still so large (>99%) as expected the daily mining reward is essentially the same. We'll see how its going when it 'stabilizes'. I see on your charts its more or less a vertical trace at the moment (probably will be for the first day).

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December 16, 2013, 03:49:09 AM
 #2385

That vertical-turns-into-horizontal shape is a confusing artifact of the 1/x function as real difficulty x changes at a constant rate. The fractional difficulty should have been defined as x -- how difficult it is to find a valide N-chain.




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maco
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December 16, 2013, 06:13:41 AM
 #2386

Friendly reminder... Primecoin Buzz Mobile App has been UPDATED!!

Source =>  https://play.google.com/store/apps/details?id=com.primecoin.buzz

Want to add your resource to our app?

Pm me with details and let's chat about getting your site/service/marketplace added to the app.


And here is how they look on my phone with Primecoin Buzz
and my other Crypto Apps available for Free @ Google Play.
6strings
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December 16, 2013, 02:23:51 PM
 #2387

So with the diff change to 10+ now do we still use the default parameters when solo mining?
Or should there be some changes to optimize the process?
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December 17, 2013, 01:25:40 AM
 #2388

So with the diff change to 10+ now do we still use the default parameters when solo mining?
Or should there be some changes to optimize the process?

Good question, and how do you apply the new formula mikaelh posted?

Say I have 0.433335 cpd...I get something like this (which makes no sense): 0,43335 * (1 - 10.1326 + 0.035)

huh O.o  Huh
glongsword
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December 17, 2013, 01:34:05 AM
 #2389

So with the diff change to 10+ now do we still use the default parameters when solo mining?
Or should there be some changes to optimize the process?

Good question, and how do you apply the new formula mikaelh posted?

Say I have 0.433335 cpd...I get something like this (which makes no sense): 0,43335 * (1 - 10.1326 + 0.035)

huh O.o  Huh

Fractional diff is the diff minus the integer part, so your formula should read 0.43335 * (1-.1326+0.035) = 0.39105504
Trillium
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December 17, 2013, 01:47:40 AM
 #2390

Yeah you leave the "10" (integer) part off:  10.1326 becomes 0.1326

As for if parameters should be changed, well someone smarter than me will need to weigh in for that.  Embarrassed

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ivanlabrie
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December 17, 2013, 04:31:54 AM
 #2391

So with the diff change to 10+ now do we still use the default parameters when solo mining?
Or should there be some changes to optimize the process?

Good question, and how do you apply the new formula mikaelh posted?

Say I have 0.433335 cpd...I get something like this (which makes no sense): 0,43335 * (1 - 10.1326 + 0.035)

huh O.o  Huh

Fractional diff is the diff minus the integer part, so your formula should read 0.43335 * (1-.1326+0.035) = 0.39105504

Thanks guys! Silly me, fractional...duh, was there all along xD

So, my theoretical dual xeon rig should get 0.4 blocks/day roughly. Interesting :p
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December 17, 2013, 05:05:29 AM
 #2392

I think neither the input nor formula are applicable any more --  the formula is for diff < 10 only, and the current chain/d numbers are calculated for target=9chains, hence not valid any more.




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mikaelh (OP)
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December 17, 2013, 10:23:22 AM
 #2393

Yes, the previous blocks/day formula was written with difficulty 9.99 in mind. This is the slightly more complicated version which is accurate for lower fractional difficulty:

blocks/day = chains/day * (0.965 * (1 - fracDiff) + 0.035)

I haven't checked yet whether the constants (0.965 and 0.035) still apply for difficulty 10. Of course, this formula only applies for the new chains/day values.

Right now at difficulty 10.15, mining should be about 22% harder than it was at 9.996. Difficulty 10.0 is about 5% harder than 9.996 in theory. The block reward has also dropped by 3%. And about 15% of 10-chains are discarded due to fractional difficulty.

I haven't checked what the new optimal mining parameters are. The old ones should still be pretty good. It might be beneficial to increase -sieveextensions.
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December 17, 2013, 10:24:24 AM
 #2394

I hope you're all enjoying your new chainsperday values  Grin

now it is faster to make block or what?
Trillium
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December 17, 2013, 12:00:11 PM
 #2395

I hope you're all enjoying your new chainsperday values  Grin

now it is faster to make block or what?

No, it's harder. Difficulty has been continously rising since passing 10 diff too.

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December 17, 2013, 02:07:50 PM
 #2396

why primecoin calculator say otherwise then?it say 33 days with my cycle, before that change, the time was 100+days to found a block...
mikaelh (OP)
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December 17, 2013, 03:50:12 PM
 #2397

why primecoin calculator say otherwise then?it say 33 days with my cycle, before that change, the time was 100+days to found a block...

Many of the calculators are still using outdated formulas. They give bad estimates when fractional difficulty is high. So the 100+ days estimate you got earlier was way too high. It should have been less than 30 days in reality.
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December 18, 2013, 01:21:33 AM
 #2398

I have a i5 2500k is this chansperday too low?



{
"blocks" : 317954,
"chainspermin" : 4,
"chainsperday" : 0.04937416,
"currentblocksize" : 4996,
"currentblocktx" : 8,
"difficulty" : 10.15431237,
"errors" : "",
"generate" : true,
"genproclimit" : -1,
"primespersec" : 1515,
"pooledtx" : 8,
"sieveextensions" : 9,
"sievepercentage" : 10,
"sievesize" : 1000000,
"testnet" : false
}
cryptrol
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December 18, 2013, 06:45:53 AM
 #2399

I have a i5 2500k is this chansperday too low?

{
"blocks" : 317954,
"chainspermin" : 4,
"chainsperday" : 0.04937416,
"currentblocksize" : 4996,
"currentblocktx" : 8,
"difficulty" : 10.15431237,
"errors" : "",
"generate" : true,
"genproclimit" : -1,
"primespersec" : 1515,
"pooledtx" : 8,
"sieveextensions" : 9,
"sievepercentage" : 10,
"sievesize" : 1000000,
"testnet" : false
}


Seems ok now with the new difficulty.
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December 23, 2013, 12:46:17 PM
 #2400

if I have a chains/day value of 2.7 with N-chain value of 9 what should I expect with N-chain=10?
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