How to find first ten prime numbers that are greater than 4?

16 views (last 30 days)
Hi,
How am I going to make an array that consists of first 10 prime numbers that are greater than 4 as follows?
a=[5 7 11 13 17 19 23 29 31 37]
Thank you.

Accepted Answer

Matz Johansson Bergström
You could do it like this
x = primes(100); %pick primes smaller than, say 100
x = x(x>4); %pick the ones larger than 4
x(1:10) %pick the first ten of those
  1 Comment
Matz Johansson Bergström
Edited: Matz Johansson Bergström on 4 Oct 2014
If you want to pick the first n primes larger than k, then there might be some way to first estimate the upper bounds of the number in the function primes you need, by using the "prime-counting function", see http://en.wikipedia.org/wiki/Prime-counting_function. In this case you also have to account for the shifting of k ofcourse. So it's not trivial in that case.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!