Here we introduce a formula that sends primes numbers into natural numbers and composite into fractions. L(n)=π(n) +(n-pπ(n))/Δ where π(n) is the prime-counting function and Δ is the gap between two consecutive primes. We calculate the first few numbers. L(1) = 0, L(2) = 1, L(3) = 2, L(4) = 2.5, L(5) = 3, L(6)... Continue Reading →