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Search: id:A108052
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| A108052 |
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Integers n such that 10^n+19 is a prime number. |
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+0
27
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| 1, 3, 5, 7, 10, 11, 17, 59, 81, 108, 574, 629, 1069, 1759, 2063, 2682, 9174
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Some of the larger entries may only correspond to probable primes.
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EXAMPLE
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n = 7 we have 10^7+19 = 10000000+19 = 10000019, which is prime.
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MATHEMATICA
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Select[Range[2*10^3], PrimeQ[10^#+19]&] - Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 29 2008
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CROSSREFS
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Cf. A049054, A088274, A088275, A095688.
Sequence in context: A140607 A071561 A138968 this_sequence A046868 A104309 A033035
Adjacent sequences: A108049 A108050 A108051 this_sequence A108053 A108054 A108055
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KEYWORD
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hard,more,nonn
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AUTHOR
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Julien Peter Benney (jpbenney(AT)ftml.net), Jun 01 2005
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EXTENSIONS
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9174 from Ryan Propper (rpropper(AT)cs.stanford.edu), Jan 02 2008
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