in reply to
a close prime number
What have you tried? What directions are you thinking of?
If you don't provide those items, we quite reasonably are going to consider this an attempt to get us to do your homework for you.
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.