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Search: id:A111023
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| A111023 |
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Integers n such that 9*10^n+11 is a prime number. |
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+0
1
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| 1, 2, 3, 4, 6, 8, 16, 20, 27, 115, 180, 274, 576, 1111, 2404
(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 = 6 is a member because: 9*10^6+11 = 9*1000000+11 = 9000011, which is prime.
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MATHEMATICA
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Do[If[PrimeQ[9*10^n+11], Print[n]], {n, 1, 1300}] - Zak Seidov (zakseidov(AT)yahoo.com), Sep 14 2006
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CROSSREFS
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Cf. A100275 = numbers n such that 9*10^n-11 is prime.
Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054, A110980.
Sequence in context: A084239 A049708 A000031 this_sequence A008324 A084074 A144722
Adjacent sequences: A111020 A111021 A111022 this_sequence A111024 A111025 A111026
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KEYWORD
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nonn
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AUTHOR
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Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2008
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