[XPM] [ANN] Primecoin High Performance | HP14 released! - page 16.

arnuschky

hero member

Activity: 518

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Quote from: Scott J on October 16, 2013, 09:33:14 AM

Head's up to anyone using grom's XPM miner - he is taking a cut of your shares.

http://www.ppcointalk.org/index.php?topic=485.msg5168#msg5168

Thanks for the heads up. I'm not using this miner, but that's not very honest. ("I installed a trojan to extract part of your BTC to support me!")

Out of curiosity: what is this miner and why would anyone use it? How does it differ from the -HP series?

Trillium

hero member

Activity: 546

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Quote from: Scott J on October 16, 2013, 09:33:14 AM

Head's up to anyone using grom's XPM miner - he is taking a cut of your shares.

http://www.ppcointalk.org/index.php?topic=485.msg5168#msg5168

Xolominer now supports pool fees option via command line to be as low as 1% (see the OP).

If anyone thinks that is too high, well you should probably just go and solo mine with Sunny Kings original client or mikaelh's HP.

Scott J

legendary

Activity: 1792

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Head's up to anyone using grom's XPM miner - he is taking a cut of your shares.

http://www.ppcointalk.org/index.php?topic=485.msg5168#msg5168

gwedo

member

Activity: 83

Merit: 10

Quote from: Ifaistos on October 12, 2013, 01:06:27 PM

Anyone got any insights on the rapid increase in difficulty (and price) today ?

Selling XPM at these days is very unwise.
People should be holding this coin it will grow in value at least 10 times once all issues will be solved.
according to marketcap, it goes constantly higher and higher. I wouldnot be surprised if it become the second coin after the bitcoin before Xmas. because litecoin can hardly survive in long term.

Today people were dumping altcoins because bitcoin grew only a few $$.
but in long term this low price of altcoins attract money that are flowing around and all these money will want to buy XPM, ADT, pennies, quarkcoin, securecoin, iFC and all usefull coins.
I put all my money into primecoin and other coins. I am sure some of them will grow even more than bitcoin (of course they will not be $200 but when XPM grow skyhigh again it could be 10,000% earning)

atomium

donator

Activity: 406

Merit: 252

Study the past, if you would divine the future.

this is amazing news!

maco

sr. member

Activity: 294

Merit: 250

XPM on BTC-e

https://twitter.com/primecoiner/status/389457554662637568

Follow all current Primecoin XPM events, news, and media awareness through @ http://twitter.com/Primecoiner

Official Thread: https://bitcointalksearch.org/topic/primecoin-xpm-social-media-team-d-d-305956

satriani

member

Activity: 93

Merit: 10

it would be nice if somebody create a calculator how much could i mine XPM per day on diffrent CPU

mhps

hero member

Activity: 516

Merit: 500

CAT.EX Exchange

Quote from: B.T.Coin on October 12, 2013, 10:02:59 AM

Quote from: one4many on October 12, 2013, 09:13:55 AM

Quote from: B.T.Coin on October 12, 2013, 02:14:41 AM

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

I understand from your comment that the difficulty is not linear then.
But would such a small change in difficulty have such a big impact?

Suppose in a given time period you should on average find N 9-chains. If the difficult is 9.86, you have N*(1-0.86) chance to find blocks because only those chains with the fractional part of difficulty > 0.86 are counted as blocks. Also in the mean time, you are expected to find about N/10 chains and N/100 11 chains. So In total you find N*(1-0.86)+0.11*N blocks. When the difficulty arises to 9.90, you still find the same number of chains, but only N*(1-0.90)+0.111N blocks.

((1-0.90+0.11)) / ((1-0.86)+0.11) = 84%

So your probabily of finding blocks has dropped since 9.86

Ifaistos

newbie

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The rapid increase in difficulty i think has to do with more things than social media posts.
I think we will soon find out

maco

sr. member

Activity: 294

Merit: 250

Quote from: Ifaistos on October 12, 2013, 01:06:27 PM

Anyone got any insights on the rapid increase in difficulty (and price) today ?

Where has everyone been? XPM has been recommended for its high values in future data growth. We know Primecoin was at the top of bitcointalk charts for a LONG time... not to be afraid to say, XPM did reach a high peak early on. You get the picture I think.. More info on recent developments @ https://twitter.com/primecoiner/status/389108798004019200

Snapshot included.

Ifaistos

newbie

Activity: 18

Merit: 0

Anyone got any insights on the rapid increase in difficulty (and price) today ?

binaryFate

legendary

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Still wild and free

Quote from: B.T.Coin on October 12, 2013, 10:02:59 AM

Quote from: one4many on October 12, 2013, 09:13:55 AM

Quote from: B.T.Coin on October 12, 2013, 02:14:41 AM

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

I understand from your comment that the difficulty is not linear then.
But would such a small change in difficulty have such a big impact?
I will read into the difficulty adjustment of primecoin and if this is true then it may be time to hop onto another cpu coin.

And writing my post did manage to break my bad luck. I found 4 blocks in the last 4 hours

EDIT: I found this in Sunny King's Primecoin Paper:
Eventually I discovered that the remainder of Fermat test could be used to construct a relatively linear continuous difficulty curve for a given prime chain length. This allows primecoin to largely keep the security property of bitcoin.

Note that instead of considering difficulty, and its progression (linear or not?) which is a difficult question in primecoin apparently, one can just consider the amount of ressources currently devoted to mining. If (variance appart) somebody with constante ressources was finding 6 blocks a day, and now only one, that means the overall computational power used for mining primecoins has been multiplied by 6. I found that unlikely in few days.

B.T.Coin

sr. member

Activity: 332

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Quote from: one4many on October 12, 2013, 09:13:55 AM

Quote from: B.T.Coin on October 12, 2013, 02:14:41 AM

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

I understand from your comment that the difficulty is not linear then.
But would such a small change in difficulty have such a big impact?
I will read into the difficulty adjustment of primecoin and if this is true then it may be time to hop onto another cpu coin.

And writing my post did manage to break my bad luck. I found 4 blocks in the last 4 hours

EDIT: I found this in Sunny King's Primecoin Paper:
Eventually I discovered that the remainder of Fermat test could be used to construct a relatively linear continuous difficulty curve for a given prime chain length. This allows primecoin to largely keep the security property of bitcoin.

one4many

hero member

Activity: 516

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Quote from: Carra23 on October 12, 2013, 07:29:08 AM

Will the difficulty drop? I am still getting roughly a block a week.

History says no ... A prediction for the future based on the past, therefore also says no.

A global blackout or at least a blackout in Europe and/or American continent could cause something like it.
Is this likely to happen? No, probably not ... so it will not go down either (with that crazy idea).

If you can thing of other more likely events let us know ... we wait and prepare for it.

one4many

one4many

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Activity: 516

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Quote from: B.T.Coin on October 12, 2013, 02:14:41 AM

I know the only answer to this question can be: bad luck.

No ... not bad luck ... higher difficulty ...
It went from 9.86 to 9.90 within one week. This makes it very unlikely for you to find more than 1 block a day.

one4many

Carra23

legendary

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Need a campaign manager? PM me

Will the difficulty drop? I am still getting roughly a block a week.

B.T.Coin

sr. member

Activity: 332

Merit: 250

I know the only answer to this question can be: bad luck.
But this is getting too crazy to be just bad luck so hopefully someone can shed some light on this situation for me.
About a week ago I generated a new wallet with -keypool=10000 and installed this one wallet on all my primecoin miners.
I'm running about 100 celeron processors and together they hit about 6 or 7 blocks a day that appear in the same wallet.
This went on consistant for the first 5 days and now for almost 2 days NOTHING Sad

Surely this can not be just bad luck. Does anybody have a clue what is goin on?
If I check any of the miners, I see primespersec, chainsperday, generate:true, testnet:false.... nothing has changed to these settings over the last days.
And in task manager I see primecoin eating up all cpu-recources. So what can be happening?

I did install some other non-cpu intensive software on these machines recently but I can't see how this is affecting primecoin performance. Especially with taskmanager showing 99% of the cpu to primecoin.
I'm also not on my own fork since the blocks keep counting and the chain is up to date.

Anybody?

Armchair Miner

sr. member

Activity: 296

Merit: 250

All good suggestions. As far as overheating it is weird that it would happen overnight when ambient temperatures are lower. But it could be that that is the time when primecoin would take up most of the CPU and cause most internal heating.

Issue 1)
I think I have destroyed a HP i7 laptop's screen cable running primecoin at 100% utilization. Might have overheated it. This baby is $50 on ebay plus it takes 103 screws to get to it to replace it -- the replacement cost may be lower than the repair cost. Running on External monitor, not quite a brick yet.

Issue 2, also related)
Now I am running both primecoin and quarkcoin on the same laptop, using only 6 cores total (3 each) out of 8. Both primecoin AND quarkcoin failed at about the same time, with the identical message
"Failed to write block" which shows that is more likely a system wide/laptop problem rather than a problem of primecoin-qt.

Statement like "But if you just take a random laptop and have no idea about its specifications or cleanliness and start running primecoin on it, you'll have yourself a new paperweight soon enough." should be included right next to every primecoin-qt download link Wink

Quote from: Trillium on October 02, 2013, 01:43:04 AM

Quote from: ?? on ??

Quote from: nhminer on October 01, 2013, 06:18:51 PM

Clearly -- the interesting thing is that it only happens under the stress of running the primecoin miner

Indeed. Primecoin is also memory intensive, so you could try running http://www.memtest.org/

Laptops are never good at running at 100% utilization though.

My toshiba tecra with i5 begs to differ, running at 100% for the last 3 months 24/7. I have slightly modified its cooling system to blow more air through the 'cleaning access hatch' which is usually used to access the heatsink fins without having to pull the laptop apart. It runs at 75 deg C and the CPU is rated (according to intel) to a maximum operating temp of 125 deg C.

But if you just take a random laptop and have no idea about its specifications or cleanliness and start running primecoin on it, you'll have yourself a new paperweight soon enough.

FanDjangoBTC

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Quote from: Trillium on October 10, 2013, 08:19:16 PM

So in summary:

- Poor statistical assessment with very low values of n
- Unusually high luck or extremely high performance multi-CPU server is what you are mining on
- Confusion about how HP versions work and not really following mikaelh's announcements

A+ effort.

I concur entirely. A+ detective work.

Trillium

hero member

Activity: 546

Merit: 500

Quote from: Tamis on October 09, 2013, 11:34:02 AM

Quote from: Trillium on October 07, 2013, 07:53:42 PM

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

I know, I also don't have a crystal ball to know future market prices. I made my comment 9 days ago.

Quote from: maco on October 09, 2013, 11:59:55 AM

Quote from: Tamis on October 09, 2013, 11:34:02 AM

Quote from: Trillium on October 07, 2013, 07:53:42 PM

$4 (2 blocks) at 0.55 chainsperday (HP11).

2 blocks are worth more than 4$ those past days !

I am split testing between HP11 and HP10

So far, I seem to be getting better results with HP10 in terms of ChainsPerDay and coins I've mined. However, I've mined 5 blocks in 24 hours... not bad

So in summary:

- Poor statistical assessment with very low values of n
- Unusually high luck or extremely high performance multi-CPU server is what you are mining on
- Confusion about how HP versions work and not really following mikaelh's announcements

A+ effort.

Topic: [XPM] [ANN] Primecoin High Performance | HP14 released! - page 16. (Read 397645 times)