Eigen Labs leads quantum circuit challenge, surpasses Google by over 50%

Eigen Labs just ran what might be the most consequential hackathon in crypto security history. A crowdsourced optimization challenge for quantum circuits targeting the cryptography behind Bitcoin and Ethereum produced results that beat Google’s own benchmarks by a wide margin, achieving a final efficiency score roughly 50% better than what the search giant published earlier this year. The optimized circuit needs just 1,151 logical qubits and 1.30 million Toffoli gates, yielding a Q x T score of approximately 1.496 billion. Google’s reported benchmark sat at roughly 3 billion Toffoli gates. Participants matched Google’s results within 8 hours of the challenge launching and surpassed them within 72 hours. What happened and why it matters The challenge, which launched in early June 2026, focused on optimizing a reversible quantum circuit for secp256k1 elliptic curve point addition. That’s the specific mathematical subroutine at the heart of Shor’s algorithm, the quantum computing approach that could theoretically crack the ECDSA signature scheme protecting transactions on Bitcoin, Ethereum, and most other major blockchains. Google kicked the door open on this conversation back in Marc...