The Schinzel-Sierpinski conjecture

This conjecture states : $$\text{Every rational }\frac{n}{d}\text{ can be written }\frac{p+1}{q+1}\text{ where p, q are prime numbers}.$$
For instance: $\frac{22}{7}=\frac{43+1}{13+1}\text{, }\frac{355}{113}=\frac{2129+1}{677+1}$

Find the representation for $\frac{2^{19}-1}{2^{19}}$.

Answer format: p,q // Give the smallest pair p,q

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