Keep going.

See the hint at the page secret1. A perfect number is a number whose sum of divisors (except the number itself) is equal to the number itself. For instance, 18 is perfect, since 28 is divided by 1, 2, 4, 7, 14, and 1 + 2 + 4 + 7 + 14 = 28. What is the first perfect number? Go past it, i.e. add 1 to it.