Project Eleven Announces 1 BTC Bounty Win
On April 24, 2026, Project Eleven awarded its Q‑Day Prize of one bitcoin (worth approximately $77,674.05 at the time) to independent researcher Giancarlo Lelli. The prize was granted after Lelli successfully broke a 15‑bit elliptic curve key using publicly accessible quantum hardware.
Significance of the 15‑Bit Break
The attack demonstrates that practical quantum attacks on real cryptographic systems are advancing, though it is far from threatening bitcoin’s current security. Bitcoin relies on 256‑bit elliptic‑curve keys; a 15‑bit key offers only 32,767 possible values, a negligible search space compared to the billions required for a full break.
Progress From Previous Demonstrations
Lelli’s result represents a 512‑fold increase over the prior public demonstration—a 6‑bit key broken by Steve Tippeconnic in September 2025 on IBM’s 133‑qubit machine. The jump underscores rapid progress in quantum capabilities.
Resource Estimates Shrink Fast
A recent Google Research paper estimates that a complete 256‑bit attack would require fewer than 500,000 physical qubits, down from earlier projections in the millions. Project Eleven CEO Alex Pruden noted that the winning submission came from an independent researcher using cloud‑accessible hardware rather than a national laboratory or proprietary quantum chip.
Implications for Bitcoin and Other Blockchains
Project Eleven estimates that roughly 6.9 million bitcoin—about one third of total supply, including Satoshi Nakamoto’s approximately 1 million coins—are stored in addresses with exposed public keys. A quantum computer capable of breaking 256‑bit ECC could potentially access these wallets.
Post‑Quantum Migration Plans
Bitcoin developers have proposed solutions such as BIP‑360, which would introduce quantum‑safe address types. Similar post‑quantum transition strategies are being developed by Ethereum, Tron, StarkWare, and Ripple.
Community Response
While the 15‑bit breakthrough does not signal an imminent threat to bitcoin’s security, it heightens awareness of quantum risk and accelerates discussions around transitioning to post‑quantum cryptography across major blockchain platforms.
