Image Limits are 32mb but an image that's 24mb is not being smushed

Hello,

I've bulk smushed my images which has worked great, but the image http://domainedesjeanne.com/wp-content/uploads/2016/03/Domaine-des-Jeanne-Mousseux-1-0524.png, which is 31MB, doesn't work.

Any ideas?

Hoping you can help.