a^2 - b^2 ≡ (a+b)(a-b)
a and b are positive whole numbers with a>b
a^2 - b^2 is a prime number
why are a and b consecutive numbers
I don't understand your question.
Wait, but I know 7^2-6^2=13, which is prime...
Oh, but I know that difference between the consecutive numbers=sum of the numbers.
+-40 
