Problem 241. Project Euler: Problem 7, Nth prime

Created by Doug Hull

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By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.
What is the Nth prime number?
Thank you to Project Euler Problem 7

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Last Solution submitted on Jan 23, 2026

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John D'Errico on 22 Feb 2018

Aw drat. I was going to submit the n'th prime problem until I saw this.

John D'Errico on 22 Feb 2018

Sadly, I see there are too few test cases, and the problem is too easy to cook.

Jiawei Gong on 7 Apr 2020

why 'nthprime' not allowed?

Sachin Mysore on 15 Mar 2022

There's a really easy way to cheese this problem if you find it. It happens to lie in the comment John D'Errico made about there being too few test cases. I'd encourage you to do the problem properly without such a cheese

Aadhithya T V on 14 Jan 2023

A good problem!

Brandon on 22 May 2023

I'm really wondering about this cheese, as the problem is stupidly simple already. Even a proper solution is size 16. 25 if you really want to push huge numbers and use a proper upper bound on the nth prime.

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Problem 241. Project Euler: Problem 7, Nth prime

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Problem 241. Project Euler: Problem 7, Nth prime

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Last 200 Solutions

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Problem Recent Solvers1745

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