More detail: https://ohiobitcoin.com/coins/goldmaxcoin’
Goldmaxcoin (symbol GMX) is a lite version of bitcoin utilizing coin as a proof-of-work algorithm with 2.5 minutes block targets. In around four years, the subsidy halves in 840k blocks and now there are approximately 84 million Goldmaxcoin tokens in total. The rest is the same as bitcoin with 50 coins per block and 2016 blocks used to retarget difficulty.
