It can take up to 72-hours from the time you take an exam at a test delivery provider (TDP) for your exam results to move from the local testing centers (usually only sent once a day around 1:00am local time), to the TDP system, and into F5's system (updated every 8-hours).
When your results have been processed you will get an email from the candidate management portal telling you that your results have posted. Since those emails only go out once a day, you may be able to view your results before getting an email by logging into the portal.
Results include your score and the required passing score and can be found via http://certification.f5.com/
NOTE: If you have not gotten an email and cannot see exam results 72-hours after your exam, please open a ticket.