"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson
"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson
You do understand that 2 is the smallest prime number, correct?
If you do not understand that then this problem is not one you can solve till you understand more about prime numbers.
Therefore all the numbers that start and end with "1" do not count as valid for this problem. I have no idea if the ones with "1" in the middle count as valid.
Tim S.
"...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson