Independent researcher Giancarlo Lelli broke a 15-bit elliptic curve key on publicly accessible quantum hardware, 512 times larger than the previous public demonstration in September 2025. An independent researcher used publicly accessible quantum hardware to break a 15-bit elliptic curve key, winning Project Eleven’s one bitcoin Q-Day Prize in the largest public demonstration yet of a quantum attack relevant to cryptocurrencies. While the feat is far from threatening bitcoin’s 256-bit elliptic…
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