Difficulty - Bitcoin Wiki

CCoin

Fresh and new Crypto Currency coin.
[link]

FoxCoins: The OFFICIAL FoxCoin subreddit for all things FoxCoin!

Talk about FoxCoins, participate in giveaways/contests, tec.
[link]

Bankcoin!

[link]

Can someone help me understand how the difficulty number relates to the block hash? (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

The reference implementation of Bitcoin adjusts the difficulty level every 2016 blocks. Clearly drift concerns is a recent manifestation.

Satoshi had no intention of making the rate of block discovery accurate and you need look no further than the original DAA that adjusts on a 2016 block interval. It was simply designed to govern the rate of reward and limit the term any one miner gets to control the blockchain.
The blockchain is motivated by work based on random draws, where the only throttle is setting the difficulty bar at a level where the blocks are emitted at a statistically predictable target of 10 minutes. The difficulty for the next 2016 blocks is based on the prior 2016 blocks.
A system design based on a statistically governed random draw, where the throttle adjusts every 2 weeks, shows absolutely no needs or concerns for the concept of drift.
Drift correction is trivia at best, or simply the commonplace pitfalls of bikeshedding and perfection paralysis that creep into any engineering project.
submitted by bitmeister to btc [link] [comments]

05-05 11:24 - 'We've done it! The last difficulty adjustment of the era of the 12.5 BTC rewards. BLOCK 628,992 saw an impressive, ALL-TIME HIGH difficulty adjustment of 16.10 T + 0.92% increase from last difficulty adjus...' (twitter.com) by /u/bitentrepreneur removed from /r/Bitcoin within 64-74min

We've done it! The last difficulty adjustment of the era of the 12.5 BTC rewards. BLOCK 628,992 saw an impressive, ALL-TIME HIGH difficulty adjustment of 16.10 T + 0.92% increase from last difficulty adjustment. Also witnessed the 2nd highest average hashrate in bitcoin history-> 115.27 EH/s
Go1dfish undelete link
unreddit undelete link
Author: bitentrepreneur
submitted by removalbot to removalbot [link] [comments]

Bitcoin Cash is 45 blocks ahead of Bitcoin SV, and on a chain with higher difficulty too!

submitted by MemoryDealers to btc [link] [comments]

The difficulty drop coming with the next block (about -15%) is the second biggest, bitcoin has ever seen. The biggest was 2011/10/31 (-18%), after which the price doubled within two months. 15 months later price found itself 20-folded.

The difficulty drop coming with the next block (about -15%) is the second biggest, bitcoin has ever seen. The biggest was 2011/10/31 (-18%), after which the price doubled within two months. 15 months later price found itself 20-folded. submitted by castorfromtheva to Bitcoin [link] [comments]

Can quantum computers mine bitcoin? If so, wouldn't it be able to find a block in less than a second, turning the mining difficulty algorithm basically useless?

submitted by edudafa to Bitcoin [link] [comments]

Block 479808 has been mined! Difficulty now 7 % of BTC! Bitcoin Cash now 168% more profitable to mine than BTC

and boys when I say 168% i don't mean 68% above parity. I mean 168%. Lets go.
any of you merchants that need to start accepting it can use Rocketr to do so :)
submitted by rawb0t to btc [link] [comments]

Bitcoin Hash and Difficulty Play Leads to Rare Block Variations

Bitcoin Hash and Difficulty Play Leads to Rare Block Variations submitted by parakite to Bitcoin [link] [comments]

#crypto #cryptonews #bitcoin @nocroom #Non identified miners switching off hashrate on BCH leading to a 14% difficulty drop in 2 blocks and a close to 2 hours block followed by 25 blocks in 45 minutes when they switch their ASICS back on again.

#crypto #cryptonews #bitcoin @nocroom #Non identified miners switching off hashrate on BCH leading to a 14% difficulty drop in 2 blocks and a close to 2 hours block followed by 25 blocks in 45 minutes when they switch their ASICS back on again. submitted by PooPoster1 to Cryptoandme [link] [comments]

Top post on r\bitcoin: "Why SegWit2x (B2X) is technically inferior to Bitcoin Cash (BCH)" BCH fixes quadratic hashing; BCH has 8MB blocks; BCH has replay protection (B2X doesn't); BCH has emergency difficulty adjustment; BCH is non-hostile. B2X could cause chaos and should be abandoned ~ u/jonny1000

submitted by ydtm to btc [link] [comments]

Some very large consolidations going on.. or spam in Bitcoin tx mempool. 40 MB showed up after the latest difficulty adjustment with blocks still coming in fast.

Some very large consolidations going on.. or spam in Bitcoin tx mempool. 40 MB showed up after the latest difficulty adjustment with blocks still coming in fast. submitted by Mikeross14 to Bitcoin [link] [comments]

Bitcoin Cash is 616 blocks away from next difficulty adjustment

Next adjustment @Block 479808
Next difficulty change: 250 Blocks away (Aug 17 20:00:03 2017 UTC)
Estimated difficulty change: 40-45%
submitted by german_bitcoiner to btc [link] [comments]

On Bitcoin Core developer mailing list: Hardfork to fix difficulty drop algorithm suggested to take care of potential drop in number of miners after the halvening this July. However, if a hardfork is considered anyway, then why not increase block size in that same hardfork while we're at it?

submitted by r5t6y7 to Bitcoin [link] [comments]

The second 300% difficulty increase for Bitcoin Cash is in 30 blocks. What next? Same as before?

The second hash rate exodus is probably upon us. Like the recent article from Mengerian stated, the EDA will be on for a while so, as long as the market price of Bitcoin Cash is, more or less, above 0.14 BTC and bellow 0.35 BTC these swings can occur.
What would it take to get Bitcoin Cash over 0.35? Any guesses?
submitted by m4ktub1st to btc [link] [comments]

PSA: Line-by-line breakdown of the logic used in the 2016-block difficulty adjustment. Posted here because there is some confusion about difficulty on Bitcoin Cash.

I am posting this here because I see people in other threads afraid that difficulty may rise because we had EDA (emergency difficulty adjustment) take us down to 13% of hashrate difficulty, when in reality it will not have taken us ~16 weeks to get to 2016 blocks (as 13% would indicate).
In an attempt to provide some insight as to exactly how the difficulty retarget works, I am posting the below line-by-line breakdown.
TL;DR: Difficulty will adjust off the current working difficulty, whatever it may be. If it takes longer than 2-weeks, we adjust down. If shorter, we adjust up. Since it took us longer than 2 weeks already, we are definitely adjusting down!
. .
Line-by-line breakdown of the "CalculateNextWorkRequired()" function in pow.cpp, which is called for every 2016th block in the chain to retarget difficulty:
Comments: Note how clearly it's written. Very clear, concise and simple code.
This function is called every 2016 blocks to determine the correct acceptable difficulty of the next block (basically it is what does the adjusting every 2016 blocks). This function is "orthogonal to" (separate from) the "emergency difficulty adjustment" that Bitcoin Cash introduces and it works off the current difficulty (which may have been previously readjusted down by the emergency difficulty adjustment code or not).
Basically bitcoin has a single 'difficulty' variable, conceptually, and EDA readjusts this variable and/or this function does every 2016 -- but it's the same variable that both sets of code tweak.
uint32_t CalculateNextWorkRequired(const CBlockIndex *pindexPrev, int64_t nFirstBlockTime, const Consensus::Params ¶ms) { 
The incoming parameters explained:
  • pindexPrev -- a pointer to the tip of the blockchain right before a new block arrives.
  • nFirstBlockTime -- the timestamp of the first block in this 2016-block series
  • params -- the consensus params being used -- basically bitcoin has alternate consensus rules if it's on testnet or on mainnet or if it's in the developer debug REGTEST chain. The params variable captures the consensus rules being used.
    if (params.fPowNoRetargeting) { return pindexPrev->nBits; } 
The above is simply checking if we're in a special test/debug mode where a global flag disabling difficulty retargeting is set (as might be done on the REGTEST or TESTNET, optionally). Not used in mainnet, so safe to ignore the above lines. If the flag is set, return early and do no difficulty retarget.
 // Limit adjustment step int64_t nActualTimespan = pindexPrev->GetBlockTime() - nFirstBlockTime; 
Takes the current time and the time of 2016 blocks ago and measures the space in between. No magic here -- this is basically how much time has elapsed in 2016 blocks. EDIT: Unit is seconds
 if (nActualTimespan < params.nPowTargetTimespan / 4) { nActualTimespan = params.nPowTargetTimespan / 4; } 
params.nPowTargetTimespan for mainnet is set to 2 weeks' worth of seconds, or 120960 seconds. Compute readjustment but if it's below 25%, limit it to 25%
 if (nActualTimespan > params.nPowTargetTimespan * 4) { nActualTimespan = params.nPowTargetTimespan * 4; } 
Limits readjustment to 400%.
 // Retarget const arith_uint256 bnPowLimit = UintToArith256(params.powLimit); 
bnPowLimit is the absolute maximum pow limit set. For mainnet I believe the limit is MAX_INT_256 (which is an obscenely large number). For testnet it may be much lower.
 arith_uint256 bnNew; 
This will be the new difficulty.
 bnNew.SetCompact(pindexPrev->nBits); 
Pre-set the new difficulty to current difficulty (note how current difficulty may have been readjusted previously by Bitcoin Cash's emergency difficulty readjust).
 bnNew *= nActualTimespan; 
Scale the difficulty up to the actual timespan. Note actual timespan is clamped in the range (25%,400%) of 120960 seconds aka (30240,483840) seconds.
 bnNew /= params.nPowTargetTimespan; 
Divide the computed product back by the idealized timespan (120960). This basically is what retargets difficulty right here, in simple math.
 if (bnNew > bnPowLimit) bnNew = bnPowLimit; 
Cap the difficulty at the limit for this configuration.
 return bnNew.GetCompact(); 
Return the result as a 32-bit 'compact' representation of the difficulty.. the details of what this number means I won't go into here as they aren't important.
} 
submitted by NilacTheGrim to btc [link] [comments]

Less than 100 blocks to go before Bitcoin Cash difficulty retarget -- expect profitability to double. Retarget is at 479808. What will miners do?

A chain death spiral for Bitcoin Legacy is not entirely out of the question.
If miners defect in droves.. it can happen.
I know it may be premature for me to say that. For all we know tomorrow everything resets, but it's a real possibility.
And I am a bit saddened, actually that it might occur.
Interesting times, indeed.
submitted by NilacTheGrim to btc [link] [comments]

What's going on with Slush's Pool?

Is it normal to take 8 hours on a block?
Current round started at: 2013-02-26 07:46:52 UTC
Current round duration: 8:34:32
Current shares CDF: 99.84 %
Current Bitcoin block, difficulty: 223227, 3651011
Pool luck (1 day, 7 days, 30 days): 81%, 91%, 105%
Current server load (60 sec average): 279 getwork/s
Connected workers, Tor workers, Stratum: 0, 0, 11196
Total score of current round: 98772340.9291
Shares contributed in current round: 23466624
Hashrate on Stratum interface (30 min average): 2732.931 Ghash/s (81%)
Approx. cluster performance (30 min average): 3345.032 Ghash/s
submitted by FapFlop to Bitcoin [link] [comments]

Bitcoin Difficulty period (2,016 blocks) length in days, all time. 14 days expected (red line) vs. actual (blue dots)

Bitcoin Difficulty period (2,016 blocks) length in days, all time. 14 days expected (red line) vs. actual (blue dots) submitted by CoinCadence to Bitcoin [link] [comments]

Why does the bitcoin protocol not incrementally increase block size, like already done with difficulty? Perhaps matched to Moore's law?

As storage capacity and compute speed increases over time why are blocks not incrementally being increased to keep pace? I don't fully get the technicalities and I'm trying to understand the schism over block size hard forks such as 2x. So far I'm pro core and don't like the idea of more centralisation/increased chance of censorship, but would a slow growth that matches global average hardware capabilities be a good or bad thing if it was possible?
Edit: people are getting hung up on the Moores Law part rather than the essence of the question which is why block size was designed to be fixed rather than incrementally increasing from the outset, at a rate that tracked or was slightly less than average global increase in computing/storage/bandwidth. It's entirely irrelevant whether 'moores law' is that metric (and I regret the obfuscation). No need to point out I have reading to do either.
submitted by poptarttss to Bitcoin [link] [comments]

Some very large consolidations going on.. or spam in Bitcoin tx mempool. 40 MB showed up after the latest difficulty adjustment with blocks still coming in fast.

Some very large consolidations going on.. or spam in Bitcoin tx mempool. 40 MB showed up after the latest difficulty adjustment with blocks still coming in fast. submitted by Mikeross14 to CryptoCurrency [link] [comments]

Bitcoin difficulty reaches all-time high after increasing by 11.26% as of block 578,592

Bitcoin difficulty reaches all-time high after increasing by 11.26% as of block 578,592 submitted by n4bb to CoinPath [link] [comments]

The EDA on Bitcoin Cash does not break the definition of BTC in Satoshi's whitepaper: "the proof-of-work difficulty is determined by a moving average targeting an average number of blocks per hour. If they're generated too fast, the difficulty increases."

submitted by cryptorebel to btc [link] [comments]

What is bitcoin difficulty? Bitcoin mining difficulty example. THIS IS CRAZY!! Bitcoin basics: What is the difficulty target and how does it adjust itself? How to Calculate Bitcoin Difficulty Cryptocurrency Mining Difficulty Explained - Mining Difficulty And Analysis

Bitcoin difficulty is a measure of how many hashes (statistically) must be generated to find a valid solution to solve the next Bitcoin block and earn the mining reward. As you can see in the Bitcoin difficulty chart above, the Bitcoin Difficulty makes adjustments often. Furthermore, the mining difficulty also keeps the block generation in line ... Das Bitcoin-Netzwerk variiert seine Bitcoin Difficulty aller 2016 Blöcke, um einen konstanten Output zu gewährleisten. Wenn die Hash-Rate des Netzwerks hoch ist und die Zeit, die benötigt wird, um einen neuen Block zu entdecken, weniger als 10 Minuten beträgt, dann erhöht das Netzwerk den Schwierigkeitsgrad proportional, um die Blockerkennungszeit zu erhöhen. Wenn die Blockerkennungszeit ... Before we even begin to understand what bitcoin mining difficulty means, we need to know how mining works. We have covered this topic in detail before, so we will just give you a little overview before getting into the different nuances of difficulty. Following that, we will look at how mining difficulty is calculated and how it changes to suit the network’s needs. Bitcoin Mining-Schwierigkeit []. Im Bitcoin-Netzwerk gibt es eine globale Sammlung von Schwierigkeiten für alle Blöcke. Damit ein Block als legitim angesehen werden kann, muss der Hash-Wert niedriger als das festgelegte Ziel sein.Die Schwierigkeit wird alle 2016 Blöcke geändert. Sicher ist, die Bitcoin Difficulty wird auch weiterhin nach jedem 2016-ten Block angepasst werden, damit die Blocktime von 10 Minuten erhalten werden kann. Unklar ist, ob sie weiter so rasch steigen wird wie in den vergangenen Jahren.

[index] [21456] [10513] [14880] [48215] [35770] [768] [25225] [50545] [42408] [30315]

What is bitcoin difficulty?

How the blockchain is changing money and business Don Tapscott - Duration: 18:50. TED 2,397,711 views. 18:50 . Can Bitcoin Survive a Difficulty Crash? - Duration: 3:36. Chronos Crypto 373 views ... Why does Bitcoin have a "difficulty" and what does this difficulty represent? How is this number calculated and why is it important? In this video, shot in the Wynwood art district of Miami, I ... Blockchain/Bitcoin for beginners 9: Bitcoin difficulty, target, BITS ... Bitcoin basics: What is the difficulty target and how does it adjust itself? - Duration: 7:12. Keifer Kif 4,486 views. 7:12 ... Bitcoin Mining Difficulty: An Overview - Duration: 4:37. AMBCrypto Recommended for you. 4:37 . Why there will never be more than 21 million bitcoin. - Duration: 8:18. Keifer Kif 751 views. 8:18 ... What is crypto mining difficulty, how is it adjusted, what is the point of a block time? Vosk explains how the difficulty for mining a block reward is adjusted when mining Bitcoin on sha-256 or ...

#