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A296520
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Multidigit primes in which the largest digit appears only once.
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0
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13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 211, 223, 227, 229, 239, 241, 251, 257, 263, 269, 271
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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In 13 the last digit is the largest, in 131 the middle digit and in 41 the first digit.
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MATHEMATICA
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Reap[Do[p=Prime[k]; id=IntegerDigits[p]; If[Count[id, Max[id]]==1, Sow[p]], {k, 6, 100}]][[2, 1]]
(* Second program: *)
Select[Prime@ Range[5, 60], Last@ Select[DigitCount[#], # > 0 &] == 1 &] (* Michael De Vlieger, Dec 14 2017 *)
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CROSSREFS
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A156666 is a subsequence (except that the single-digit primes are included).
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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