Since this question is about site analytics which is not accessible to everyone I have tried to omit any sensitive information. Please tell me if I have included anything I should not have.
I was looking at the site analytics for the programming puzzles and code golf Stack Exchange and I noticed something strange. Several, (between 10 and 15) of the referring sites are listed as having 247 visits. Since that is most of the sites listed this seems very strange to me. It hardly seems possible that this is happening purely by coincidence.
Why is the number 247 so common in the site analytics? Is it an artifact of the way scores are calculated? Is it just a coincidence?