Three codes were hidden in the AGENT OLYMPIAD BEGINS… post on the Investigate Ingress blog.

[1] syt78cqzv632as

[2] 2544275454304528343123415358554321

[3] d5ope9h3in2fgcsr5n

Code #1

Observations

Passcode format is there, go through your usual cipher routine

Code #2

Observations

Spot the passcode format and check the range

Code #3

Observations

18 characters with the right amount of numbers for a valid passcode