Electrostatics: JEE Main 2025 Physics question

A square loop of sides $a=1$ m is held normally in front of a point charge $q=1$ C. The flux of the electric field through the shaded region is $\frac{5}{p}\times\frac{1}{\varepsilon_0}\ \frac{\mathrm{Nm^2}}{\mathrm C}$, where the value of p is ____.