This is a flash fiction venture with a fun idea behind it: 42 categories, each with 42 entries, made up of 42 word stories. Titles are 42 letters (+/- 2 I think) and bios are 42 letters. One entry per author, but they allow 3 more under pen names. As you can see from the Submission Grinder stats (https://thegrinder.diabolicalplots.c...ket/Index/8497), the acceptance rate is high.

The easiest way to find it is to search for "42" on submittable: