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A179026
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Primes whose only prime digits are 3's.
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2
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3, 13, 31, 43, 83, 103, 113, 131, 139, 163, 193, 311, 313, 331, 349, 383, 389, 431, 433, 439, 443, 463, 613, 631, 643, 683, 839, 863, 883, 983, 1013, 1031, 1033, 1039, 1063, 1093, 1103, 1163, 1193, 1301, 1303, 1319, 1361, 1381, 1399, 1433, 1439, 1483, 1493
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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pd3Q[n_]:=Module[{idn=IntegerDigits[n]}, MemberQ[idn, 3]&&Union[PrimeQ[ DeleteCases[ IntegerDigits[n], 3]]]=={False}]; Join[{3}, Select[ Prime[ Range[300]], pd3Q]] (* Harvey P. Dale, Jun 12 2013 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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