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A064118
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Numbers k such that the first k digits of e form a prime.
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12
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OFFSET
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1,2
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COMMENTS
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REFERENCES
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C. A. Pickover, The Mathematics of Oz, "2, 271, 2718281", Chapter 95, Camb.Univ.Press, UK 2002.
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LINKS
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Eric Weisstein's World of Mathematics, e Digits
Eric Weisstein's World of Mathematics, e-Prime
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EXAMPLE
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a(2)=3 because the 3-digit number 271 is prime.
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MATHEMATICA
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Do[If[PrimeQ[FromDigits[RealDigits[N[E, n + 10], 10, n][[1]]]], Print[n]], {n, 1, 2300}]
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CROSSREFS
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KEYWORD
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base,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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