Mining revenue has reached its highest mark since early August 2019.
Bitfarms announced the placement Sunday.
At the crypto market's 2017 peak, Marathon barely had $50 million in market capitalization.
The illegal mining operations will be disconnected from the national power grid and the miners will face prosecution.
Bitmain pre-sold over 3 months of inventory in December.
Riot's value was less than $50 million when it started mining bitcoin three years ago.
The announcement comes after a holiday weekend in which the price of bitcoin hit a succession of new all-time highs.
Bitfarm shares have soared 230% in December.
Nasdaq-listed bitcoin mining firm Riot Blockchain (RIOT) announced its purchase of 15,000 additional mining ASIC machines from Bitmain, pushing the total number of machines ordered by the mining company to over 31,000 in 2020.
The bitcoin mining industry needs more than a market rally to survive – it needs to find answers to its environmental and geographical threats.
The company has "regularly waved profits" for three years, the firm's CEO wrote Thursday.
Share prices for publicly traded bitcoin mining companies are climbing as the leading cryptocurrency sliced through $20,000 Wednesday.
Alex Liegl has resigned as CEO to be replaced by fellow co-founder Jakov Dolic, who has rejoined the company.
The firm is looking to improve efficiency in "difficult temperature environments."
The troubled bitcoin mining pool is up 181 PH/s from its 18 PH/s lows in November.