Do you know ??
There are “Good Prime Numbers ” & “Bad Prime Numbers “
Actually , Prime numbers are of three forms
1) p =2
2) p =4m+1
First two forms are ” Good Prime Numbers ”
& third one is ” Bad Prime Numbers “
Why Good & Bad Prime numbers ?
Why they are called so ??
Curious to know about it ??
If then , the first two forms of Prime Number can be expressed as the sum of two square numbers , whereas the third form cannot be expressed as sum of two square numbers.
Look at some examples
2 = 1^2 +1^2
5 = 1^2 +2^2