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A242824
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Primes formed by the initial digits of the decimal expansion of 1/7, starting at the first nonzero digit in the expansion.
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4
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OFFSET
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1,1
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COMMENTS
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Next term has 355 digits.
All terms are of the form 6x+1; a(4) has 823 digits; and there are no further terms up to and including 10000 digits. - Harvey P. Dale, Oct 03 2018
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LINKS
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MATHEMATICA
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Select[Table[FromDigits[PadRight[{}, 6n+1, {1, 4, 2, 8, 5, 7}]], {n, 200}], PrimeQ](* Harvey P. Dale, Oct 03 2018 *)
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CROSSREFS
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KEYWORD
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nonn,base,bref
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AUTHOR
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STATUS
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approved
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