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A228226
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Integer lengths of log(2)-primes: numbers n such that the concatenation of the first n decimal digits of log(2) is prime.
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1
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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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log(2) = 0.6931471805... and the 321-digit number 6931...0641 is the smallest prime in the first digits, so a(1) = 321
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CROSSREFS
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Cf. A002162 (decimal digits of log(2)).
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KEYWORD
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nonn,base,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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