10,000 qubits to crack encryption? Quantum computing paper on arxiv today is exciting, but let me explain. It's 11K qubits for ECC-256, running for 9 months. Or 26K for ECC-256 running for 10 days. Huge accomplishment! For RSA 2048 it's more like 100K (similar to Pinnacle Architecture numbers, but 3 month run time).