SOLUTION: If P+1 = N^2 , then find out the value of P ! Here , P= prime number & N = Normal number

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Question 624694: If P+1 = N^2 , then find out the value of P !
Here , P= prime number & N = Normal number
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
Solution:
P+1 = N^2
P = N^2-1
P = (N-1)(N+1)
But P is prime then N-1=1 or N+1 = 1
N-1 = 1 then N=2 and P = 3
N+1 = 1 then N =0 and P = -1 (not prime)
Answer: P = 3
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