2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114148In this note, we show that there are many infinity positive integer values of $n$ in which, the following inequality holds $$ \left\lfloor{1/2}(\frac{(n+1)^2}{\log(n+1)}-\frac{n^2}{\log n})-\frac{\log^2 n}{\log\log n}\right\rfloor\leqπ\big((n+1)^2\big)-π(n^2). $$This is a three pages unsuccessful (but maybe useful) challenge, for proving the old-famous conjecture, which asserts for every positive integer n, the interval (n^2,(n+1)^2) contains at least a primeNumber Theory11A41, 11N05text