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A128946
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Numbers n such that the largest prime < 10^n is a twin prime member.
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0
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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For n=1, 10^1 = 10. 7, the greatest prime < 10, is a member of the twin prime pair 5,7.
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PROG
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(PARI) g(n)=for(x=1, n, y=precprime(10^x); if(ispseudoprime(y-2), print1(x", ")))
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CROSSREFS
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KEYWORD
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hard,more,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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