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A279622
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Numbers with a prime factor greater than 5.
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7
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7, 11, 13, 14, 17, 19, 21, 22, 23, 26, 28, 29, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 46, 47, 49, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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fQ[n_]:=!PowerMod[30, n, n] == 0; Select[Range[100], fQ]
Select[Range[100], Max[FactorInteger[#][[;; , 1]]]>5&] (* Harvey P. Dale, Feb 28 2023 *)
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PROG
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(PARI) isok(n) = vecmax(factor(n)[, 1]) > 5; \\ Michel Marcus, Dec 21 2016
(PARI) is(n)=if(n<7, return(0)); n>>=valuation(n, 2); n/=3^valuation(n, 2) * 5^valuation(n, 5); n>1 \\ Charles R Greathouse IV, Dec 22 2016
(Magma) [n: n in [1..100] | not PrimeDivisors(n) subset [2, 3, 5]]; // Vincenzo Librandi, Jan 29 2017
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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