The primary address is the oldest in the Awazon pool and the one the board recommends trying first. Longer-lived onions accumulate stable Tor descriptor consensus and tend to route through known-good guards, which is why this address usually resolves faster than a freshly rotated one.
Over the observation window it has held the highest availability of the three, sitting above ninety-nine percent. That figure is measured from periodic reachability checks across several Tor circuits, not a live probe, so treat it as a recent trend rather than a to-the-second guarantee. When the board records a dip, it lands in the incident log with the date and the duration.
Latency is the other axis the board tracks. On this address it reads low, meaning the anti-DDoS queue and the login captcha usually render within a few seconds on a healthy circuit. If it stalls for longer than a minute on your side, the cause is almost always your circuit rather than the address. Build a new one and retry, or move to the secondary while you do.
Whatever address you use, verify it before you enter anything. Copy it from this board, hold it against the address the login captcha prints, and never type a fifty-six character string from memory. See verifying a mirror.