Bitcoin (CRYPTO: BTC) miner Marathon Digital Holdings Inc (NASDAQ:MARA) on Wednesday released a production and mining operations update. What Happened: Marathon Digital mined 705 Bitcoin in September, up 5% from August. The company’s total Bitcoin holdings were 26,842 at the end of the month after opting not to sell any Bitcoin in September. Marathon won 207 blocks last month, up 6% compared to August. The company said its energized hash rate increased 5% month-over-month to 36.9 EH/s in September. Marathon noted that it remains on track to reach its target of 50 EH/s by the end of the year. “…