An emirp is an integer that, when its digits are written in reverse order, is a prime number. For example, 73 is an emirp because 37 is prime. What is the smallest two-digit prime number that is NOT an emirp?
+65 37 and 73 are also part of a smaller sequence. The list contains prime numbers in which every single permutation (including deletion) is prime
SEQUENCE:
2-2
3-3
5-5
7-7
37-37,73,3,7
73-73,37,7,3
There are only these 6 numbers in the list.
Answer to your question (if the second number isn't double-digit): 10
Answer to your question (if the second number is double-digit): 12
+37146 I think the smallest prime I can think of that is NOT a emirp itself would be 19.
