Here :
https://en.wikipedia.org/wiki/Hall%27s_conjecture
the so-called Hall-conjecture is formulated and an example is given that would require a very small constant in the Hall-conjecture. It contains numbers $x$ and $y$, such that the maginude of $|y^2-x^3|$ is "very small" compared to the magnitude of $x$ and $y$.
Can we construct such "spectacular" triples or find them systematically in a reasonable time ? Or is the triple found just a "lucky strike" ?
It's certainly more than just a "lucky strike".
Noam Elkies's page referenced in that Wikipedia page gives some information:
See also OEIS sequence A078933 and links there.