https://privatekeys.pw/puzzles/bitcoin-puzzle-tx2024-09-12: puzzle #66 (6.60126013 BTC) was solved by 1Jvv4yWkE9MhbuwGUoqFYzDjRVQHaLWuJd (tx) but the original spending transaction was replaced by bc1qpkp47q5cucrvnyepsdnjcv2kzyav5ze0ta7n67 (tx) spending only 5.93923605 BTC. Another address 15XVN6hFkzGdUTY1XcsYKXxRezjARwyBQx took the rest of the prize: 0.66100387 BTC (tx).
Look like 66bits publickey isn't safe, can be cracked in less than 0.5 seconds.