Three codes were hidden in the HTML source of the TRANSPARENCY post on the Investigate Ingress blog.
[1] 7l5nkse9osmf3i3e
[2] 2nteauq57atnqb25
[3] 1700145910555891725
Code #1
Observations
16 characters with the right amount of numbers for a valid passcode. This one will make you smile !!
Code #2
Observations
Again, 16 characters with the right amount of numbers for a valid passcode
Code #3
Observations
Try to split things up to get the passcode format these are not all numbers