Of the stars in the Gaia / Hipparchos catalogs, which one is the most isolated? This is just a matter of curiosity; I was thinking about a scifi story. 

By "Isolated", I mean that if for every star (or binary) we found the distance to its closest neighboring star, then which one would be the furthest from its closest neighbor?
From a comment by barrycarter: 


  In our galaxy, it might be CX330, which is 1000 light years from any star-forming region, much less any star. However, the article describes it as "Loneliest Young Star", so there may be older stars that are even more isolated. This source contains the phrase "CX330 [...] has been described as the galaxy's loneliest star.", but this may just be bad reporting.