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A167483
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Primes prime(n) such that n and prime(n) have only prime digits.
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2
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3, 5, 257, 2237, 2377, 2557, 5557, 33353, 33377, 73237, 252233, 252253, 253573, 3533377, 3533533, 3555557, 3577333, 5375327, 5375533, 7725733, 7737557, 7777337, 37237523, 37237573, 37237723, 37273237, 37273337, 55775227, 527522777, 527523223, 527532553
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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The prime prime(7235) = 73237 is in the sequence because 7235 and 73237 contain only prime digits. - Giovanni Resta, Mar 11 2013
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MATHEMATICA
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pQ[n_] := Union[IntegerDigits@n, {2, 3, 5, 7}] == {2, 3, 5, 7}; Prime@
Select[Range[10^5], pQ@# && pQ@Prime@# &] (* Giovanni Resta, Mar 11 2013 *)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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