klopt het in principe dat het zo is:
(preorders_hashps_totaal + netwerk_hashps_totaal)/(netwerk_hashps_totaal) = difficulty multiplier ?
Ja, de verhouding tussen difficulty en hashrate is lineair. Dus stel dat de hashrate van het netwerk vertienvoudigt, dan zal de difficulty ook 10x zo hoog worden (na uiterlijk 2 weken). Eigenlijk niet 2 weken maar 2016 blokken. En per difficulty adjustment is het max een factor 4 sneller of langzamer. Dus stel dat de snelheid direct na een difficulty adjustment 10 keer zo hoor wordt, dan duurt het 2016 * 10 minuten / 10 keer sneller = 2016 minuten = 33 uur en 36 minuten voordat het 4 keer zo hoog is geworden. Vervolgens is het 10 / 4 = 2.5 sneller dan het eigenlijk moet zijn, dus duurt het 2016 * 10 / 2.5 = 8064 minuten = 5 dagen 14 uur en 24 voordat het nog eens 2.5 keer zo hoog is geworden. |
|
|
|
|
Geeeeen idee en erg moeilijk te voorspellen.
Ik geloof dat er ordernummers zijn bij BFL tot tegen de 10000 aan ofzo, maar wie zegt dat het laatste nummer niet een checksum is van de eerste 4 en er dus maar 1000 orders zijn, of wie weet hoeveel van die kleine dingen van 150 euro besteld zijn en hoeveel minirigs.
|
|
|
|
|
Probably
My guess it's power efficienty in Mhash/s will be somewhere between the cpu's and gpu's we already have.
|
|
|
|
|
After I've made some nice profit with mining bonds/shares but lost most of it with the pirate thing.
I've sold some bitcoins to get my initial investments in euro back and play with the few bitcoins I've left.
Now I've created my own trading bot for an exchange site that I'm currently testing.
I started with 3.15 BTC and now I have 3.35 BTC, 6.3% increase in a little over a week.
The profit is not yet enough to pay for the electricity to keep my computer running, but I'm thinking about renting a vps somewhere and running the bot on it, or try to port it to linux so it can run on the raspberry pi I have and buy some more coins to get more profit.
I've started this week to write down every hour what my current profit/loss is, yesterday I've made 0.56% profit.
The best thing about this is that I don't have to wait for dividents and have full control over it, but it is a little more work to do.
I was initially thinking about making an esset on GLBSE someday, but not anymore.
I haven't decided if and how I make the bot public, but I am thinking about running it like a service for people. They tell me their api-key and I run it with the parameters they like. But if I ever do that, I have to improve and rewrite some parts of the bot.
|
|
|
|
I would like to keep the comparison in wattage. Are joules a 1:1 to wattage?
Joule is energy, Watt is power. 1 joule = 1 watt-second. |
|
|
|
Finding someone's private key to take their bitcoins is hacking with the intent of theft.
I didn't think of this simple answer, thanks!  In addition to the present impracticality of brute forcing key collisions, Bitcoin's internal design is modular and is thus capable of swapping in an alternative crypto algo and later deprecating the existing one without a hiccup. In fact, the current method of block hashing (just as an example) requires the use of SHA256 (secure hasing algorithum 256 bit) twice to produce a validatable block hash. One of these two algos are likely to be replaced with another similar algo yet to be created, without removing the second use of SHA256. This results in strengthing of the blockchain brute force security without the risk of accidentally exposing it temporarily during the transition to another algo. Very likely, the second instance of SHA256 will not be replaced until yet another, better, algo is developed or SHA256 is shown to have a flaw.
In a similar manner, wallet.dat keys are created using elliptic curve public/private cryptography; but once a better algo is developed in the future, both the present form of creating addresses and the new form of creating addresses could coexist for a time, permitting users to migrate over time. Eventually, once the present (older) algo is no longer considered safe enough for the common hardware available, the old transactions long unspent on the blockchain using the old algo would likely only be "lost" coins, and thus be salvage by natural law. I.E. ten years after the new algo came online there are still hundreds of old transactions on the blockchain decades old, those who can brute force those private keys first get to move them to a new algo address of their own. In the long run, even bitcoins are never lost.
EDIT: This modularity was an orginal design consideration. Present bitcoin address all begin with a [ 1 ] for this reason, (testnet coin addresses all begin with a letter, IIRC) and thus future address algos can identify the algo used to produce them by the leading character. Yes, this too was on purpose. Satoshi was a far thinking genius.
If it would be legal to salvage old coins after a change in the key algorithm, when will it be legal? If for example, I save some coins on a wallet on an old usbstick for when I retire, why would it be legal for someone to salvage those keys. So, legal after 10 years? or 100 years? Another thing I just thought about, how can you ever find out who got you keys with the anonymity of bitcoin. |
|
|
|
Culculations how much faster the hardware needs to be to proof I can't just crack a bitcoin address :I've found at https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses how an address is calculated. To generate a specific address that already has bitcoins I need to calculate at average 2^160 keys. At http://www.bitcointrading.com/forum/bitcoin-software/vanitygen-vanity-bitcoin-address-generator-%28v0-17%29/ how quick addresses can be generated. The fastest graphics card for this has a rate of 23.5 Mkeys/second. So lets round the generating speed to the nearest 2^x speed, we get 2^24 keys/second. On average we need 2^160 / 2^24 = 2^136 seconds, or more understandeble human language, more time than the universe exists. If I want to be able to crack an address in less than a day, for example a little over 18 hours (to get a nice 2^x seconds), I have 2^16 seconds to do it so I need to be 2^136 / 2^16 = 2^120 times faster than with the current hardware. If I take into account that at the moment hardware still get 2 times faster each 1.5 yeah, I need to wait 180 years for hardware capable of breaking a bitcoins address within one day. So technically it is not (yet) possible to do this kind of thing. My actual questionWhat if someone or something is able to do this kind of calculations, and thus can spent every coin mined today, or is just very very very lucky and finds someone elses keys without hacking into other computers. Will it be legal to spend the coins?
|
|
|
|
|
Waar haal je de actuele prijs vandaan? Op intersango zie ik 9,60 en op mtgox zie ik 9,53 maar bij jou zie ik 9,70
|
|
|
|
Its still all a foreign language to me.
If a Jalipino from BFL costs IRO $150.00 it is 3.5 GHs
In the current environment how long will it take to earn 15 coins?
Regards
S.
At the moment the difficulty is 2,864,141. This means you need to hash at average 2,864,141 blocks of 2^32 values to find a block of 50 BTC. The average time it takes to find a block is 10 minutes. This gives 2^32 * 2864141 / 10 / 60 = 20.5023 Tera hashes / second. If you add 3.5 GHash/s to it the total speed will be 20.5058 THash/s. Your part will be at that moment 20.5058 / 0.0035 = one 5858.8th of the network. With mining on a pool you get on average 50 / 5858.8 = 0.00853417 BTC each 10 minutes, so 15 BTC will take about 1758 times 10 minutes or 12.2 days. But when the BFL miners will be available you won't be the only one who got one of them. If they sell 3000 jalapeno's, 1000 single's and 100 mini rigs (I just made up this numbers) that would be 3000 * 3.5 + 1000 * 40 + 100 * 1000 GHash/s = 150.5 THash/s. Total speed would be 171 THash/s of which you own 3.5 GHash, a 48857th of the total. This will make the time to earn 15 BTC 48857 / 5858.8 = 8.33 times longer. The 12.2 days becomes 101,6 days. If they deliver after the reward half it takes 2 times longer, 24.4 and 203,2 days. If they even sell more hashing power than my wild guess.... and then some competitors come with their ASIC's.... |
|
|
|
|
For me it tells 9 hours left.
|
|
|
|
|
Heb je daar een link van?
|
|
|
|
|
SHA256 has a blocksize of 512 bits, 64 bytes.
To find a winning block that gives 50 BTC you need to have a block of 80 bytes that give a low enough value hash.
In the 80 bytes block are 4 bytes you can fill in yourself, those are located after the first 64 bytes.
So the mining software sends 80 bytes to the miner.
The miner hashes the first 64 bytes to a midstate.
The miner fills in 0 for the 4 bytes and calculates the hash for midstate+last part.
The miner fills in 1 for the 4 bytes and calculates the hash for midstate+last part.
The miner fills in 2 for the 4 bytes and calculates the hash for midstate+last part.
The miner fills in 3 for the 4 bytes and calculates the hash for midstate+last part.
...
The miner fills in <some random value> for the 4 bytes and calculates the hash for midstate+last part.
The hash is low enough so the miner tells the mining software about it.
This way, 2^32 hashes can be done with just sending 80 bytes once and receiving on average 80 bytes back.
2^32 hashes is 4.294967296 Ghash/s.
So a 4 Ghash/s miner only needs 160 bytes/seconds.
Probably a little more for the protocol used, but you get the point.
|
|
|
|
Sorry nothing to see here just subscribing
You mean the thing you can do with the watch button? |
|
|
|
|
The cooling of my computer isn't the best. I don't want another heat producer inside it.
Besides, for the people who really want to mine big, the total number of pci/pci-e/whatever type of cards is limited to a very low number. usb goes up to 127 devices each controller.
|
|
|
|
|
Als je bijvoorbeeld 2 BTC hebt in je wallet en je maakt 0,5 BTC over naar een adres dan moet die 1,5 BTC ook ergens heen.
Om alles meer anoniem te maken wordt er voor die 1,5 BTC een nieuw adres gemaakt en komt het daar op te staan en onthoud de client in de wallet dat dit nieuwe adres ook van jou is.
Waarschijnlijk is het adres wat je noemt zo'n adres?
|
|
|
|
Toen is hij begonnen met zijn savings ding. Wanneer je op dit forum een post edit zie je blijkbaar niet wanneer en dat hij aangepast is. |
|
|
|
|
Only the BFL units from third party, not other boards from other vendors.
|
|
|
|
|
Show Posts
