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A121267
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Number of decimal digits in A047777(n).
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3
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1, 5, 1, 3, 1, 2, 1, 4, 3057, 2, 3, 14650, 4, 2, 46, 4
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OFFSET
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1,2
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COMMENTS
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Not equal to the first differences of A053013 (which is based on a different variant of A047777).
"A new visitor to an old problem! Jens Kruse Andersen confirmed the primality of Nash's 3057-digit prime using PRIMO." - Carlos Rivera, Sep 2002.
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LINKS
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PROG
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(PARI) default(realprecision, 5000); c=Pi/10; u=[]; for(k=1, 9e9, ispseudoprime(c\.1^k) & !setsearch(u, c\.1^k) & (u=setunion(u, Set(c\.1^k))) & !print1(k, ", ") & k=0*c=frac(c*10^k)) \\ - M. F. Hasler, Sep 15 2013
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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The old values a(10) onwards were incorrect, as discovered by M. F. Hasler, Aug 31 2013. The old values, the b-file and the Mathematica program have been deleted. - N. J. A. Sloane, Sep 01 2013
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STATUS
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approved
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