I've written a formula for primes less than x?

[stolla]

I've written a formula for primes less than x? and it gives the accurate.

now, what's the next step I should take to publish it?

 

[Ishuda]

I've written a formula for primes less than x? and it gives the accurate.

now, what's the next step I should take to publish it?

It depends on what you mean. Given a list of the first n primes, one can always write a formula which gives the primes, i.e f(1)=2, f(2)=3, f(3)=5, ...f(n)=nth prime. For example, see Lagrange Interpolating Polynomials
http://mathworld.wolfram.com/LagrangeInterpolatingPolynomial.html