# Sundaram's Sieve

Issue 50March 2009

### Step 3

Show that if *N* does not lie in our array, then 2*N*+1 is prime.

Got it, on to the conclusion;

I'm stuck, give me a hint;

Back to the main article.

March 2009

Show that if *N* does not lie in our array, then 2*N*+1 is prime.

Got it, on to the conclusion;

I'm stuck, give me a hint;

Back to the main article.