4 years ago, when I learned about factorising and complex numbers, me and my friend worked on factorising complex numbers.

For example, $ 4+2i= 3-(-1)+2i = 3-i^2+2i = -(i^2-2i-3) = -(i-3)(i+1) $

The goal was to represent $a+bi$ with product of same form. where $a$ and $b$ are integer.

Another example is, $ 8+i= 8i^4+i=i(8i^3+1)=i(2i+1)(4i^2-2i+1)=i(2i+1)(-2i-3)=-i(2i+1)(2i+3) $

I showed my teacher, and she said it's useless.

Now I think of it, I don't know why I did this and it looks like same thing just in different form.

Is there any research already done on this or can there be any use of it?




  • 3
    $\begingroup$ Yes, there's a lot of work done on this. Look up Gaussian Integers. $\endgroup$ Jul 26, 2018 at 14:07
  • 5
    $\begingroup$ And by no means is it useless! $\endgroup$
    – Lubin
    Jul 26, 2018 at 14:11
  • $\begingroup$ There's research already done, but that does not mean there can't be any use of the work you do on this, when you've read up on the existing work. $\endgroup$ Jul 26, 2018 at 14:13
  • 1
    $\begingroup$ I was thinking @Henrik, that knowing how to factor Gaussian integers is useful in what might look like other parts of mathematics. $\endgroup$
    – Lubin
    Jul 26, 2018 at 14:15

1 Answer 1


You might want to look at Gaussian integers.


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