# the magical number...

Level pending

A number is $$a_1a_2a_3a_4$$.

$$a_1$$ is the number of (100/100) numbers below 100.

$$a_2$$ is 100^ln(100-100)

$$a_3$$ is the number even primes.

$$a_4$$ is the number of prime numbers under the square root of 100.