Euler Problem 7: 10,001st Prime

January 16, 2017

(This article was first published on Data Science with R, and kindly contributed to R-bloggers)

Euler Problem 7 Definition

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 1,0001st prime number?


The function determines whether a number is a prime number by checking that it is not divisible by any prime number up to the square root of the number.

The Sieve of used in Euler Problem 3 can be reused to generate prime numbers.

This problem can only be solved using brute force because prime gaps (sequence A001223 in the OEIS) do not follow a predictable pattern. <- function(n) {
    primes <- esieve(ceiling(sqrt(n)))

i <- 2 # First Prime
n <- 1 # Start counter
while (n<10001) { # Find 10001 prime numbers
    i <- i + 1 # Next number
    if( { # Test next number
        n <- n + 1 # Increment counter
        i <- i + 1 # Next prime is at least two away

answer <- i-1

The largest prime gap for the first 10,001 primes is 72. Sexy primes with a gap of 6 are the most common and there are 1270 twin primes.

Euler Problem 7: Prime gap frequency distribution for the first 10001 primes.

Prime gap frequency distribution for the first 10001 primes.

The post Euler Problem 7: 10,001st Prime appeared first on Data Science with R.

To leave a comment for the author, please follow the link and comment on their blog: Data Science with R. offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers


Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)