Does reversing the order of the digits of a 2-digit prime number always result in a prime number?

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asked Aug 17, 2019 75.2k views

1 Answer

Adriano Spadoni · Answer 1 · 2019-08-21T11:51:02+0000

No, for example 13 is a prime number and reversing it is 31 which is also a prime number.
11=11-also prime
13=31-also prime
23=32-NOT PRIME
23=92-NOT PRIME

Does reversing the order of the digits of a 2-digit prime number always result in a prime number?

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