I was able to achieved another once in a lifetime perfect AP score of straight 5555555 digits. This is not easy to achieve as an Ingress player since you only get to level up only once and get AP scores based on your actions. AP or Access Points which are often called Action Points, are the experience points of Ingress. Most gameplay actions have equivalent points for an agent or an Ingress player such as deploying Resonators, destroying Links, and creating Fields, and these points contribute to his or her Access Level. Achieving perfect AP score is already an achievement since an agent can only achieve certain number of AP based on their current levels.

Levels and needed AP/Medals:

• L1 Agent = 0 AP
• L2 Agent = 2,500 AP
• L3 Agent = 20,000 AP
• L4 Agent = 70,000 AP
• L5 Agent = 150,000 AP
• L6 Agent = 300,000 AP
• L7 Agent = 600,000 AP
• L8 Agent = 1,200,000 AP
• L9 Agent =  2,400,000 AP + 1 gold 4 silver
• L10 Agent = 4,000,000 AP + 2 gold 5 silver
• L11 Agent = 6,000,000 AP + 4 gold 6 silver
• L12 Agent = 8,400,000 AP + 6 gold 7 silver
• L13 Agent = 12,000,000 AP + 1 Platinum 7 Gold
• L14 Agent = 17,000,000 AP + 2 Platinum 7 Gold
• L15 Agent = 24,000,000 AP + 3 Platinum 7 Gold
• L16 Agent = 40,000,000 AP + 2 Black 4 Platinum 7 Gold

Based on the list above, at my current level which is Level 10, I can only achieve a once-in-a-lifetime score of 5,555,555 before I reach level 11.

Sources:

http://decodeingress.me/ingress-manual/leveling/
http://ingress.wikia.com/wiki/Access_Points