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Search: id:A050805
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| A050805 |
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Inserting any digit between adjacent digits of prime p never yields another prime. |
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+0
3
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| 439, 853, 1013, 1061, 1109, 1117, 1153, 1187, 1213, 1249, 1259, 1283, 1291, 1301, 1303, 1361, 1427, 1451, 1489, 1511, 1523, 1531, 1583, 1597, 1607, 1657, 1733, 1747, 1753, 1801, 1873, 1879, 1913, 1951, 2069, 2083, 2137, 2243, 2251, 2267, 2293, 2297
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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E.g. 437 yields these ten composites -> 40307, 41317, 42327, 43337, 44347, 45357, 46367, 47377, 48387, 49397.
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CROSSREFS
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Cf. A050674-A050719, A050806.
Sequence in context: A006911 A142753 A142141 this_sequence A157737 A061328 A092048
Adjacent sequences: A050802 A050803 A050804 this_sequence A050806 A050807 A050808
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KEYWORD
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nonn,nice,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1999.
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