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Search: id:A133858
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| A133858 |
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Primes of the form 11^n - 2. |
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+0
4
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OFFSET
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1,1
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COMMENT
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The only currently known primes of the form 11^n - 2 correspond to numbers n = {4, 6}. Last digit of a(n) is 9.
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EXAMPLE
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a(1) = 11^4 - 2 = 14639,
a(2) = 11^6 - 2 = 1771559.
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CROSSREFS
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Cf. A104096 = Largest prime <= 11^n. Cf. A130652 = 11^n - 2. Cf. A128472 = smallest prime of the form (2n-1)^k - 2 for k>(2n-1). Cf. A084714 = smallest prime of the form (2n-1)^k - 2. Cf. A014224, A109080, A090669, A128455, A128457, A128458, A128459, A128460, A128461.
Adjacent sequences: A133855 A133856 A133857 this_sequence A133859 A133860 A133861
Sequence in context: A076165 A032736 A032738 this_sequence A023683 A017284 A017392
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KEYWORD
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bref,hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Sep 27 2007
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