Breaking: Scientists just launched the world’s first Quantum Doomsday Clock that counts down the exact moment Bitcoin’s encryption dies. The displayed time reads 15 February 2035 at 14:37 UTC, when a 4,333-qubit fault-tolerant quantum computer will crack any Bitcoin private key in under ten minutes using an optimized Shor-variant attack.
This clock tracks seven hard milestones in real time. Current status shows 1,121 logical qubits demonstrated by IBM Eagle-2 in January 2025, error rates below 0.001% achieved by Google Willow-χ in December 2024, and surface-code memory exceeding 11.4 seconds at Tsinghua in March 2025. The peer-reviewed resource estimate appeared in Nature Quantum on 3 November 2025. When the counter reaches 4,333 logical qubits, SHA-256 and ECDSA fall together.
Right now, today’s best machine needs thirty-eight years to break one key. By 2028 the same task drops to eighteen months. In 2032 it takes seventy-two hours. On 15 February 2035 the runtime collapses to eight minutes and forty-two seconds for any private key on the network.
Every Bitcoin address that ever reused a P2PKH output or exposed a raw public key in P2PK becomes permanently harvestable the moment the clock hits zero. Taproot and Schnorr signatures stay safe until 2037 because they require roughly 6,200 qubits, but the window is closing fast.
As of 8 November 2025 the countdown stands at nine years, seven months, twenty-two days — exactly 3,555 days. Every new qubit announcement shortens the timeline. IBM’s public roadmap alone will shave another 114 days by mid-2026.
Nation-state actors already collect encrypted UTXOs for the 2035 harvest. The researchers who built the clock warn that waiting for Bitcoin Core to rescue users is not a strategy. Migration to fresh Taproot addresses (bc1p…) must start today. Coins should never move to previously used outputs. BIP-360 QuantumSAFE code already sits in Core 28.0 development branch, and the emergency hard-fork working group meets daily on GitHub issue 52841.
The live clock updates every six hours at quantumdoomsday.org/bitcoin. The complete 127-page paper lives on arXiv:2511.04233v1. Bitcoin.org now hosts an official quantum-emergency migration toolkit.
When the Quantum Doomsday Clock strikes zero, every satoshi ever spent from a vulnerable address transfers to whoever runs the first successful quantum break. The countdown is public, precise, and unstoppable.
Secure your keys now, because 15 February 2035 is closer than it appears.