Qubic's Monero 51% Hash Rate Experiment: What Happens When One Network Controls More Than Half the Mining Power

Qubic has officially released findings from its ambitious security experiment targeting the Monero network, showcasing what occurs when a single entity commands over half of the blockchain’s computational resources. According to BlockBeats coverage of the August 15 announcement, the project accomplished something previously theoretical—taking control of 52% of Monero’s total hash rate and demonstrating the technical feasibility of large-scale network manipulation.

The Experimental Results: A Glimpse Into Network Vulnerability

The implications were substantial. During the two-hour experimental window, Qubic’s operations resulted in six previously confirmed blocks being completely reorganized, while an additional 60 blocks were rendered orphaned and excluded from the canonical chain. The sheer computational dominance manifested in staggering numbers: the network orchestrated the mining of 80% of all Monero blocks during this period, generating approximately 750 XMR and 7 million XTM tokens.

These metrics translated to tangible economic data. The accumulated XTM from this round, combined with unsold Tari reserves, produced a total destruction event of 17.2 billion QUBIC tokens—valued at an average price point of roughly 3,200 QUBIC per billion, equivalent to approximately $55,000 in USD terms.

The Economics of Control: Mining Rewards and Market Implications

On the reward distribution side, the mining community received 62.2 billion QUBIC tokens, translating to roughly $200,000 in value. More significantly, comparative analysis reveals that Qubic’s current earnings structure delivers nearly quadruple the compensation available to standard Monero miners—a stark differential resulting in potential incentive misalignment within the broader network ecosystem.

The peak computational performance during the experiment reached 2.71 GH/s, representing 52% of Monero’s global hash rate at that moment. Across the entire operation, Qubic successfully mined a total of 5,506 Monero blocks, cementing the experiment’s scale and significance.

An Ongoing Investigation

Notably, Qubic has indicated that this 51% attack experiment remains actively ongoing, suggesting additional data and findings may emerge as the initiative continues. The initiative raises important questions about Monero’s current security posture and the feasibility of consensus-layer attacks against established networks.