Most number of co-authors in a single paper? Previous research

I've tried to find the answer to this question looking at the list of "Questions that may already have your answer" as I typed in the question, with no luck.

Question

What are some, say five, examples of publications with the highest recorded number of co-authors ever published, and in each of these how many co-authors were involved?
A good survey can be found in this article.  In short: within approximately the last 5 years, large international collaborations have started to exceed 1000 authors per paper.  The largest authorship papers are all LHC papers at present (with 3000+ authors), but other collaborations, particularly in biomedicine, may top that in the future.