Les options binaires désormais interdites en Israël Le gouvernement israélien est en passe de faire voter une loi interdisant l’activité de trading des options binaires sur son territoire.L’Union Européenne met Moody’s à l’amende L’ESMA (European Securities and Markets Authority), c’est-à-dire le régulateur européen des marchés financiers a infligé une amende de 1,24 million d'euros à Moody's, pour des manquements à ses obligations en lien avec la réglementation sur les agences de notation.Le cours du Bitcoin a atteint un record historique!Est-ce le moment d’investir dans le Bitcoin ?Il semblerait que oui !Présidentielle 2017 : Macron et Le Pen qualifiés pour le second tour des élections A l’issu du premier tour, Emmanuel Macron (En Marche !)recueille 23,9% des voix et Marine Le Pen (Front National) 21,4%.10 bonnes raisons de trader le Bitcoin L’investissement dans le Bitcoin a déjà séduit des millions d’utilisateurs à travers le monde.

Ethereum : le nouveau concurrent du Bitcoin ?Ethereum est une nouvelle crypto-monnaie qui présente de nombreux avantages et pourrait bientôt surpasser l’utilisation du Bitcoin.Development Total Hash Rate Total Votes Total Points Average Time To Find A Block (#83) In the pool statistics an average time to find the last 100 blocks would be really helpful.It's a lot easier to read than the CDF and will give a better estimate of how long it will take to reach a certain reward.(as it makes the calculations easy) All proposalsSee also: target Contents 1 2 3 4 5 6 7 8 9 Difficulty is a measure of how difficult it is to find a hash below a given target.The Bitcoin network has a global block difficulty.Valid blocks must have a hash below this target.Mining pools also have a pool-specific share difficulty setting a lower limit for shares.difficulty = difficulty_1_target / current_target (target is a 256 bit number) difficulty_1_target can be different for various ways to measure difficulty.

Traditionally, it represents a hash where the leading 32 bits are zero and the rest are one (this is known as "pool difficulty" or "pdiff").The Bitcoin protocol represents targets as a custom floating point type with limited precision; as a result, Bitcoin clients often approximate difficulty based on this (this is known as "bdiff").Each block stores a packed representation (called "Bits") for its actual hexadecimal target.The target can be derived from it via a predefined formula.For example, if the packed target in the block is 0x1b0404cb, the hexadecimal target is Note that the 0x0404cb value is a signed value in this format.The largest legal value for this field is 0x7fffff.To make a larger value you must shift it down one full byte.Also 0x008000 is the smallest positive valid value.The highest possible target (difficulty 1) is defined as 0x1d00ffff, which gives us a hex target of It should be noted that pooled mining often uses non-truncated targets, which puts "pool difficulty 1" at So the difficulty at 0x1b0404cb is therefore: And: Here's a fast way to calculate bitcoin difficulty.

It uses a modified Taylor series for the logarithm (you can see tutorials on flipcode and wikipedia) and relies on logs to transform the difficulty calculation: To see the math to go from the normal difficulty calculations (which require large big ints bigger than the space in any normal integer) to the calculation above, here's some python: Current difficulty, as output by Bitcoin's getDifficulty.Graphs There is no minimum target.The maximum difficulty is roughly: maximum_target / 1 (since 0 would result in infinity), which is a ridiculously huge number (about 2^224).bitcoin as fiat moneyThe actual maximum difficulty is when current_target=0, but we would not be able to calculate the difficulty if that happened.buy bitcoin direct debit(fortunately it never will, so we're ok.)copy bitcoin blockchain

See discussion in target.The minimum difficulty, when the target is at the maximum allowed value, is 1.The difficulty is adjusted every 2016 blocks based on the time it took to find the previous 2016 blocks.At the desired rate of one block each 10 minutes, 2016 blocks would take exactly two weeks to find.If the previous 2016 blocks took more than two weeks to find, the difficulty is reduced.If they took less than two weeks, the difficulty is increased.The change in difficulty is in proportion to the amount of time over or under two weeks the previous 2016 blocks took to find.bitcoin server crashTo find a block, the hash must be less than the target.bitcoin lloydsThe hash is effectively a random number between 0 and 2**256-1.bitcoin to ethereum exchange rateThe offset for difficulty 1 is and for difficulty D is The expected number of hashes we need to calculate to find a block with difficulty D is therefore or just The difficulty is set such that the previous 2016 blocks would have been found at the rate of one every 10 minutes, so we were calculating (D * 2**48 / 0xffff) hashes in 600 seconds.ethereum os linux

That means the hash rate of the network was over the previous 2016 blocks.Can be further simplified to without much loss of accuracy.At difficulty 1, that is around 7 Mhashes per second.At the time of writing, the difficulty is 22012.4941572, which means that over the previous set of 2016 blocks found the average network hash rate was (The eternal question.)The average time to find a block can be approximated by calculating: where difficulty is the current difficulty, hashrate is the number of hashes your miner calculates per second, and time is the average in seconds between the blocks you find.bitcoin canada poolFor example, using Python we calculate the average time to generate a block using a 1Ghash/s mining rig when the difficulty is 20000: and find that it takes just under 24 hours on average.ethereum tokenAny one grinding of the hash stands the same chance of "winning" as any other.