Bitcoin News

Marathon Digital’s Experiment Yields Invalid Bitcoin Block, Firm Addresses Issue Swiftly

Marathon Digital, a prominent Bitcoin mining firm, recently acknowledged mining an invalid Bitcoin block worth $26,378 as part of an internal “experiment” to optimize its operational processes. The incident raised eyebrows in the cryptocurrency community but was swiftly rectified by the company.

In a statement released on September 27, Marathon clarified that these experiments involve only a small fraction of the company’s hashrate and are not intended to manipulate the Bitcoin network in any way. They emphasized, “In no way was this experiment an attempt to alter Bitcoin Core in any way.” The error was promptly corrected once it was identified.

Marathon clarified that the bug responsible for the invalid block originated from the firm’s internal development environment. It had no connection to Marathon’s Bitcoin production pool or Bitcoin Core, the primary software for connecting to the Bitcoin network and running a node.

The incident occurred on September 26 at 9:42 pm UTC, specifically on block 809478, as reported by According to various Bitcoin developers and BitMEX Research, the invalid block resulted from a “transaction ordering issue.” One Bitcoin developer known as “mononaut” suggested that Marathon’s mistake occurred when they reordered transactions based on ascending absolute fees.

Critics, including Bitcoin analyst Dylan LeClair, argued that Marathon should have conducted such experiments on a testnet environment rather than the live Bitcoin mainnet to avoid such issues.

Marathon, upon reflection, acknowledged that Bitcoin “functioned exactly as designed” by excluding the invalid block from its blockchain. This incident inadvertently highlighted the robust security of the Bitcoin network, which swiftly rejected and rectified the anomaly.

Despite the hiccup, according to data from Google Finance, Marathon Digital’s share price (MARA) faced a slight dip of 2.91% during the opening hours of trading on September 27. While the incident may have raised concerns, it also demonstrated the Bitcoin network’s resilience in unexpected challenges, reinforcing its reputation as a secure and reliable decentralized system.


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