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A158080
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Primes p = prime(n) such that the largest even digit of n equals the largest even digit of p.
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0
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43, 239, 263, 491, 641, 727, 769, 787, 857, 967, 1013, 1021, 1087, 1223, 1229, 1231, 1237, 1249, 1259, 1279, 1283, 1291, 1297, 1327, 1423, 1543, 1549, 1619, 1657, 1663, 1667, 1669, 1693, 1697, 1699, 1789, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873
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listen;
history;
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OFFSET
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1,1
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COMMENTS
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Primes p = prime(n) such that a largest even digit individually exists in the base-10 representations of n and p, and such that it also is the same for both. - R. J. Mathar, May 19 2010
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LINKS
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MATHEMATICA
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m[n_] := Max@ Select[IntegerDigits@ n, EvenQ]; Prime@ Select[ Range@ 300, m@ # == m@ Prime@ # >= 0 &] (* Giovanni Resta, Apr 30 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base,less
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AUTHOR
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EXTENSIONS
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Corrected (61, 163, 181 removed, 239, 263 inserted, 281, 283, 421 removed, etc.) by R. J. Mathar, May 19 2010
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STATUS
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approved
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