Hi and nice to be here

Hi, I am also new here

As far as I gather generating a new block requiers solving the problem

 find x so that H(H(x)) < eps  

where H() is the hashing function, x is the input and eps is a (small) integer.
I think this is solved today by a brute force method. Miners try many variations of x until they stumble upon a solution. Making eps smaller makes the problem harder.

What happens if in 5 years there will be a quantum computer that can solve this problem very quickly with eps = 0 ? Will that be the end of bitcoin?

babalu  1CTPrhAf9rM3a1pSEG3ANnsTPwrDAT9rme

1EcaBzJBgLPQG4Px7bjQa5dnFkNrV5TwSx