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2^70 keys. 7.1 BTC. One address that has never been touched since 2015. Live brute-force of Bitcoin Puzzle #71 — the smallest unsolved range left. Real secp256k1, real addresses, real odds on screen. Unlike the bigger puzzles, #71 has no exposed public key. No shortcut exists. Brute force is the only known method, which means this is the actual frontier, not a stunt. Expected time to a hit at browser speed: 75 million years. Slightly longer than the time since the dinosaurs died. No roadmap. No utility. Just a machine grinding the last honest wall in Bitcoin, live.