Formula for finding Larger Prime from Prime Number

Open Question

Given a prime number $p$, is there a rule by which a larger prime number $q$ can be found?

Sources

• 1979: G.H. Hardy and E.M. Wright: An Introduction to the Theory of Numbers (5th ed.) ... (previous) ... (next): $\text I$: The Series of Primes: $1.5$ Some questions concerning primes: $(3)$