I wrote a 190 line algorithm using python this morning. It reduces private keys in high bits to the range I want. For example, I reduced the 80-bit pubkey to 31-bit, this took 3 seconds and it took me 0 seconds to find it with bsgs. It found it while opening the program. My algorithm seems to be working. Just for mathematics, this is mathematics, I have been following this forum for 1 year and read articles on secp256k1 and tried to understand, then a month ago, lightning flashed in my head and I thought about the algorithm until today, finally I decided to write, as you said, faith moves mountains. I think bitcoin is not secure.