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0answers
35 views

When ASICs generate a share, is it always at difficulty 1?

Are they preset to only return difficulty 1 shares when the find a nonce? Then mining software verifies if it meets current target difficulty? Or, if given a different target difficulty, will the ...
0
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1answer
35 views

What is the algorithm of block selection using Target Difficulty?

Suppose below is target difficulty: 0x0000CDEF0A000000000000000000000000000000000000000000000000000000 So result value must lower than target to select block. So, If Miner 'A' found: ...
0
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1answer
24 views

What's the advantage of using non-truncated mining targets?

Bitcoin Wiki (Difficulty): The highest possible target (difficulty 1) is defined as 0x1d00ffff, which gives us a hex target of ...
3
votes
0answers
64 views

How is the target section of a block header calculated?

I've been poking around https://en.bitcoin.it/wiki/Target and I've found the current target, but I can't seem to find how it's generated. It's supposedly generated when the difficulty is adjusted, as ...
0
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1answer
23 views

What are the pros/cons of changing the targeting interval (difficulty)?

BitShares is looking at using a target that changes every 24 hours. This is a drastic difference from Bitcoin's current interval of 2 weeks. What are the security implications that occur when ...
2
votes
2answers
126 views

How was the new target for block 32256 calculated?

I'm trying to calculate the new target for Block 32256, but I'm not getting the expected result. Here's what I did: Timestamp of the previous block (32255) = 1262152739 Timestamp of block (32255 - ...
0
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1answer
266 views

CGMiner, share sizes, what does a shares size with a G appended mean, how much larger than a M (million) share is it?

Well I think I can retire mining now, I how produced this huge hash overnight So, I have looked everywhere. How much is a G share in comparison to a M (million) share? There is no logical step ...
3
votes
2answers
131 views

Why is average time for block 8 minutes, when the target is recomputed to keep it 10 minutes?

I found out that the average time per block (based on the last 10 000 blocks) is 464 seconds - something under 8 minutes. http://blockexplorer.com/q/interval/10000 However, I thought that the target ...
1
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1answer
169 views

When a difficulty change reaches the upper or lower bound (4x current), what is the implied impact on time per block?

Can someone work out the math that occurs with Bitcoin and Litecoin when the target changes to the hard coded minimum and maximum value, with respect to time? In other words, if a lot of hashpower is ...
4
votes
1answer
1k views

What is the hash-rate of the Bitcoin network that results in the maximum difficulty?

According to https://en.bitcoin.it/wiki/Target the target is a 256-bit number. As the total hash-rate of the Bitcoin network rises, this number decreases to increase the difficulty. How much hash-rate ...
3
votes
1answer
914 views

How is the probability of winning a block calculated from the difficulty?

I have problem finding this. The Bitcoin wiki mentions the probability here, but only with a link to the current value on BlockExplorer. The wiki page on difficulty doesn't mention the formula for ...
6
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5answers
860 views

Why not retarget on every block?

Should make things smoother and result in less oscillation. Is there a reason why retargetting is only every 2016 blocks?
9
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2answers
1k views

What is “difficulty” and how it relates to “target”?

I don't understand what "difficulty" means and how it really relates to "target". I understand what "target" is - it tells the miners, how small the resulting hash should be. (Basically, how many ...
3
votes
1answer
537 views

What is wrong with this C# code that converts a block's bits into a target?

UPDATE: The code in this question works for all test cases (Hurray!) however I don't like how GetCompact uses the Math.Abs function and don't think it's true to the OpenSSL implementation. Fixing ...
0
votes
1answer
543 views

If each miner has a different share difficulty in a PPS pool, how should I calculate and reward the relative effort of each?

For discussion purposes, suppose I have an ASIC miner, several GPUs and a CPU botnet all mining with different difficulties. When a share is returned to the pool, at what difficulty threshold should ...
1
vote
1answer
120 views

Looking for unit testing data for Block.Bits to & from a JSON-RPC string

I'm trying to convert the JSON-RPC result of a Block's compressed bits property into a C# float with the following constraint //3 bytes mantissa, the leading byte as exponent (where only the 5 ...