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

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.

Answer 1

[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

[Matz Johansson Bergström]

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.