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Nth Prime

Medium

Instructions

Given a number n, determine what the nth prime is.

By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.

If your language provides methods in the standard library to deal with prime numbers, pretend they don't exist and implement them yourself.

When the input is zero (or otherwise not a positive index), throw the string

"there is no zeroth prime"

(verbatim).

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