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Emirps census (Posted on 2018-10-12) Difficulty: 2 of 5
An emirp (prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed.
This definition excludes the related palindromic primes.

13, 17, 31, 37, 71... are emirps.


List values of q(n) (the number of emirps of length n) for n=2 to 6.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
different language, same answerSteven Lord2018-10-12 21:44:48
Solutioncomputer-aided solutionCharlie2018-10-12 12:05:22
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