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|Initial release||0.15.0.1 / 12 November 2017|
|Latest release||0.15.0.2 / 6 January 2018|
|Written in||C++, Qt|
|Operating system||Windows, OS X, Linux|
|Developer(s)||Bitcoin Gold Organization|
|Source model||Open source|
|Ledger start||3 January 2009|
|Block reward||12.5 BTG (approximately to mid 2020), halved approximately every four years|
|Block time||10 minutes|
|Block explorer||BitcoinGold Explorer BTG EXPLORER BTGexp.com|
|Circulating supply||17,000,000 BTG (as of 26 April 2018[update])|
|Supply limit||21,000,000 BTG|
|Market cap||$315,000,000 USD (as of 24 August 2018[update])|
Bitcoin Gold is a distributed digital currency. It is a hard fork of Bitcoin, the open source cryptocurrency. The stated purpose of the hard fork is to restore the mining functionality with common Graphics Processing Units (GPU), in place of mining with specialized ASIC (customized chipsets), used to mine Bitcoin.
ASIC resistant GPU powered mining provides a solution, as this kind of hardware is ubiquitous, and anyone can start mining with a standard, off-the-shelf laptop computer.
The hard fork occurred on October 24, 2017, at block height 491407. The Bitcoin Gold team used ‘post-mine’ - a mining of 100,000 coins after the fork had already occurred. The team did this via a rapid mining of approximately 8,000 blocks at 12.5 BTG per block. The bulk of premined coins have been placed into an ‘endowment’, and according to the developers will be used to grow and maintain the BTG ecosystem. However, of the 100K coins, some five percent were set aside as a bonus for the team, or about 833 coins for each of the six members.
In 2018, Bitcoin Gold (and two other cryptocurrencies) were hit a by a successful 51% hashing attack by an unknown actor. The attackers successfully committed a double spend attack on Bitcoin Gold, a cryptocurrency forked from Bitcoin in 2017. Approximately $18.6 million USD worth of Bitcoin Gold was transferred to a cryptocurrency exchange (typically as part of a pair transaction in exchange of a fiat currency or another cryptocurrency) and then reverted in the public ledger maintained by consensus of Proof-of-Work by exercising a >51% mine power.
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