10

This number is a composite.

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The only known number n such that the forms n+R(n), n^2+R(n^2), 3^n+2, 3^(R(n))+2 are all primes, where R(n) is the reversal of n, i.e., 10+01=11, 100+001=101, 3^10+2=59051, 3^01+2=5. [Loungrides]

Submitted: 2016-05-17 14:13:01;   Last Modified: 2018-05-25 14:42:01.
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