Talk:Vauban/Prime/@comment-25519138-20160423093411/@comment-7302898-20160425204856

They pick primes based on one man factor and one small side factor. The main factor being age, they try to go from oldest to newest. Nova was an exception to this due to the second factor; popularity amongst community.

So they try to go by age but if the community really likes a frame (like Nova was for awhile), then they can take priority sometimes. I think the main reason that frame got primed early was it was almost entirely community-created.