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A108327
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Integers n such that 10^n-21 is a prime number.
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3
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2, 6, 32, 108, 408, 1286, 2268, 2328, 4284, 53558, 181182, 249010
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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6 is a member because 10^6-21 = 1000000-21 = 999979, which is prime.
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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Julien Peter Benney (jpbenney(AT)ftml.net), Jun 30 2005
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EXTENSIONS
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STATUS
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approved
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