# Photoelectric Primes

Algebra Level 5

Shivamani thinks that he has found a cubic polynomial $$f(x)$$ such that $$f\left( n \right) =n$$-th prime number. He found that

$\begin{cases} {f(1) = 2} \\ {f(2) = 3 } \\ {f(3) = 5} \\ { f(4) = 7} \end{cases}$

Help him find the value of $$f(5)$$.

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