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A177866
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Numbers n such that 10^n - 69 is prime.
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1
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2, 4, 6, 7, 8, 14, 20, 110, 138, 140, 145, 300, 390, 1484, 3194, 3300, 3950, 4986, 5574, 5630, 5874, 8866, 11390, 45130, 86110
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OFFSET
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1,1
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COMMENTS
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The next term, if it exists, is > 100000.
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99931".
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LINKS
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EXAMPLE
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10^6 - 69 = 999931 which is a prime number.
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MATHEMATICA
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m=1000; For[n=1, n<m, If[PrimeQ[10^n-69], Print[n]]; n++ ]
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PROG
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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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