Google Quantum AI white papers estimated in March 2026 that breaking Bitcoin's elliptic curve cryptography would require 1,200 to 1,450 logical qubits or under 500,000 physical qubits

From the articleGoogle Tackles a Key Quantum Hurdle. What It Means for BitcoinAlso in Google Says It Just Cracked One of Quantum Computing's Biggest Bottlenecks - Decrypt, Google Quantum 40x Breakthrough Rekindles Fears of Q-Day