When is the difference between two triangular numbers a prime number?

Parisj said:
Please explain simply
Click to expand...
This site is meant to help you, not just to give full explanations. We need to know what you have tried, where you need help, and how much you know that might be of use (e.g. what have you learned about number theory or related ideas). See here, as well as the page you were already referred to.

I would start by writing expressions for the mth and nth triangular numbers, then factoring the expression for the difference and thinking about what it means for that to be prime.
 
You must log in or register to reply here.
Top