Three codes were hidden in the MEMORY AND EXPERIENCE post on the Investigate Ingress blog.
[1] 5l6bcfo2owou2l4q
[2] sxtttesehturrtonfyuq
[3] -15143245433126292926321423154444441621
Code #1
Observations
16 characters with the right amount of numbers for a valid passcode
Code #2
Observations
Veni vidi vici
Code #3
Observations
The minus sign is your hint. In the end there is a mistake in the code