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A176278
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Numbers of the form 6k-1 with the least prime divisor of the form 6m+1.
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1
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77, 119, 161, 203, 221, 287, 299, 329, 371, 377, 413, 437, 497, 533, 539, 551, 581, 611, 623, 689, 707, 749, 767, 779, 791, 833, 893, 917, 923, 959, 1001, 1007, 1043, 1079, 1121, 1127, 1157, 1169, 1211, 1253, 1271, 1313, 1337, 1349, 1379, 1391, 1421, 1457
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OFFSET
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1,1
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COMMENTS
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By definition, all terms are composite numbers.
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LINKS
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MATHEMATICA
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Select[Range[11, 2581, 6], 1==Mod[FactorInteger[ # ][[1, 1]], 6]&] (* Zak Seidov, Apr 14 2010 *)
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PROG
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(PARI) isok(n) = ((n % 6) == 5) && ((vecmin(factor(n)[, 1]) % 6) == 1); \\ Michel Marcus, Feb 08 2016
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Corrected (erroneous 341 deleted) and extended by Zak Seidov, Apr 14 2010
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STATUS
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approved
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