Level 30 -> 31 should be 3,623,878,656,000 according to my calculations.
level 1; 10 exp = 1%. 10 x 100 = 1000 exp for lvl 1 -> 2.
Ch 3. "It takes 5,000 goblins to level up" Lin Moyu "3 times as much" Lin Moyu. So if it doubles each time 512,000 x 3 = 1,536,000. 5000 goblins at 300 exp each is? 1,500,000 so math checks out. At that rate it's 3.6 trillion for level 30 to level up to 31.
Hope this helps the mathematically challenged who seem to think that his level is stagnant.

