Do you know anything about secp256k1's P % 4 = 3 ? or if we could identify y parity of all keys based on such formula?
I know this is very complicated but you can get p-x % 4 = 3 every 3 keys apart, for example if you have p % 4 = 3 then p-3 % 4 = 3, p-7 % 4 = 3 etc, maybe that could be used to also find a pattern in determining the exact order of parity of y coordinates.

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Do you know I genuinely forget most of the things I discover, I mean I had found a way to always get a result with a float ending in 1, like dividing by a certain scalar and then multiplying  by a different scalar to land on something like 433.000001, I have lost my interest for this puzzle, I need some fuel.🤔