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A092767
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Numbers k such that 10^k - 11 is prime.
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12
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2, 5, 8, 12, 15, 18, 20, 30, 80, 143, 152, 164, 176, 239, 291, 324, 504, 594, 983, 2894, 22226, 35371, 58437, 67863, 180979
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OFFSET
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1,1
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COMMENTS
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Some of the larger terms may only correspond to probable primes.
The numbers corresponding to k = 324, 504, 594 & 983 are certified prime by Primo. - Robert G. Wilson v, Jul 01 2005
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LINKS
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EXAMPLE
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k = 5 is a term because 10^5 - 11 = 100000 - 11 = 99989, which is prime.
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MATHEMATICA
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PROG
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(PARI) for(n=0, 5000, if(isprime(10^n-11), print1(n, ", "))) \\ Ryan Propper, Jun 15 2005
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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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EXTENSIONS
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STATUS
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approved
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