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A119343
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Theodorus-primes: primes formed from the concatenation of the initial decimal digits of Theodorus's constant, sqrt(3).
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5
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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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sqrt(3) = 1.732050807568877..., 17--the concatenation of the first 2 decimal digits--is prime, so a(1)=17.
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MATHEMATICA
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nn=300; With[{ds3=RealDigits[Sqrt[3], 10, nn][[1]]}, Select[ Table[ FromDigits[ Take[ds3, n]], {n, nn}], PrimeQ]] (* Harvey P. Dale, Oct 24 2014 *)
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CROSSREFS
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KEYWORD
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nonn,bref,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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