Core Scientific ( OTCPK:CORZQ ) said Monday it mined ~1.4K bitcoin in November and December, each, compared with ~1.3K BTC in October. Shares of the cryptocurrency miner, which is currently undergoing Chapter 11 bankruptcy proceedings , climbed 21% on Monday. As of December-end, Core Scientific ( OTCPK:CORZQ ) operated ~152K and 153K self-mining servers, accounting for ~63% and 66% of its total number of servers and representing a self-mining hashrate of 15.4 EH/s and 15.7 EH/s in November and December, respectively. Core Scientific ( OTCPK:CORZQ ) operated ~243K and 234K ASIC servers for both colocation and self-mining as of December-end, representing 24.4 EH/s and 23.7 EH/s in November and December, respectively. The firm also provided data center colocation services for ~91K and 80.5K customer-owned ASIC servers, representing ~37% and 34% of the mining servers in operation in its data centers as of November 30 and December 31, respectively. Customer-owned ASIC servers produced ~795 and 931 bitcoin in November and December, respectively. During November and December, Core Scientific ( OTCPK:CORZQ ) powered down its data center operations on several occasions. Such curtailments totaled 5.8K MWh and ~17.2K MWh in November and December, respectively. Read SA author Josh Arnold's very bearish analysis of the crypto miner .