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Search: id:A133127
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| A133127 |
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Numbers n with the property that n followed by n 7's is prime. |
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+0
1
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OFFSET
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1,2
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COMMENT
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The numbers formed by a(1) to a(8) are certified prime and those formed by a(9) and a(10) are prp's. a(11)>10000
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EXAMPLE
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2 is a term since 277 is prime
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CROSSREFS
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Sequence in context: A019542 A101575 A009098 this_sequence A122693 A019060 A085055
Adjacent sequences: A133124 A133125 A133126 this_sequence A133128 A133129 A133130
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KEYWORD
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base,more,nonn
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AUTHOR
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Ray G. Opao (1260(AT)email.com), Sep 19 2007
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