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Primes whose decimal, binary and binary-decimal reversals are all prime.
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%I #3 Mar 30 2012 17:24:41

%S 3,5,7,11,13,17,31,71,73,107,113,313,701,727,739,757,797,941,1033,

%T 1153,1193,1453,1487,1619,1831,1879,1949,3019,3343,3389,3511,3527,

%U 3643,3803,3851,9001,9013,9173,9403,9439,9491,9497,9521,9533,9769,10151,10159

%N Primes whose decimal, binary and binary-decimal reversals are all prime.

%e 113 = 1110001 base 2, reverse the sequence of ones and zeros: 1000111 base 2 = 71. 113, 311, 71 and 17 are all prime.

%Y Cf. A007500, A074832.

%K base,nonn

%O 1,1

%A _Harry J. Smith_, Dec 19 2007