Correct Size for apple-touch-startup-image in iPhone 6, iPhone 6 Plus?

Question

Wanting to see if my math and media queries are correct here, as I cannot find this info anywhere.

Answer 1

I don't have enough reputation to comment, so here is my proposed answer, based on the excellent answer by Adam Smith:

Note the 6+ landscape image must be rotated to the right by 90° and must be sized 1182x2208. This is consistent with the landscape startup images for the iPad. If you are a webapp developer and have an iPhone 6+ please test this answer and comment. Thanks!