We establish a central limit theorem of
(1/\sqrt{h_p})\sum_{X< n \leq X+h_p}\big(\tfrac{n}{p}\big) for almost all the primes
p, with
X uniformly random in
[g(p)],
g(p) an arbitrary divergent function growing slower than any power of
p, provided
(loghp)/(logg(p))→0,hp→∞ as
p→∞. This improves the recent results of Basak, Nath and Zaharescu, who established this for
g(p) = (\log p)^A, A>1. We also use the best currently available tools to expand the original central limit theorem of Davenport and Erdős for all the primes to a shorter interval of starting points.
In this paper we exploit a Selberg's sieve argument, recently used by Harper, an intersection result due to Evertse and Silverman and some consequences of the Weil bound on general character sums.