Now we do have Marshmallows for our Redmi 2/Prime with is less than Stable but our Hero Kuma is working on it to make it as much stable as he can thanks to Kumajaya for this rom.
The ROM is still building by Kumajaya he is working really hard to make it work currently the ROM is not availaible for download for everyone but soon within a week or two the Marshmallow will be here until then be happy with the Screenshot by Kumajaya Sir