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A262836
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{3,5}-primes (defined in Comments).
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2
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2, 3, 5, 7, 17, 29, 31, 37, 41, 67, 79, 97, 101, 109, 139, 149, 151, 229, 269, 271, 311, 367, 457, 491, 701, 797, 829, 857, 911, 929, 977, 1039, 1129, 1181, 1231, 1381, 1429, 1481, 1637, 1759, 1861, 1949, 1951, 2011, 2281, 2297, 2467, 2521, 2557, 2659, 2671
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OFFSET
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1,1
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COMMENTS
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Let S = {b(1), b(2), ..., b(k)}, where k > 1 and b(i) are distinct integers > 1 for j = 1..k. Call p an S-prime if the digits of p in base b(i) spell a prime in each of the bases b(j) in S, for i = 1..k. Equivalently, p is an S-prime if p is a strong-V prime (defined at A262729) for every permutation of the vector V = (b(1), b(2), ..., b(k)).
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LINKS
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MATHEMATICA
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{b1, b2} = {3, 5};
u = Select[Prime[Range[6000]], PrimeQ[FromDigits[IntegerDigits[#, b1], b2]] &]; (* A231474 *)
v = Select[Prime[Range[6000]], PrimeQ[FromDigits[IntegerDigits[#, b2], b1]] &]; (* A262835 *)
w = Intersection[u, v]; (* A262836 *)
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CROSSREFS
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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