Answer :
13 because:
1-9 aren't fredholl numbers.
10 and 12 aren't prime.
11 is not a fredholl number.
So the smallest fredholl number, which is prime is 13.
1-9 aren't fredholl numbers.
10 and 12 aren't prime.
11 is not a fredholl number.
So the smallest fredholl number, which is prime is 13.
