Three codes could be found in the ANOMALOUS EVENT REPORT — PART ONE post on the Investigate Ingress blog.
[1] 5lod2spqh6a5x
[2] gzz36luhnepw8s2u
[3] gdukorw3h3ah58l6
Code #1
Observations
Passcode format is there, go through your usual cipher routine
Code #2
Observations
16 characters with the right amount of numbers for a valid passcode
Code #3
Observations
Don’t let that extra numbers throw you off