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Search: id:A003618
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| A003618 |
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Largest n-digit prime.
(Formerly M4452)
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+0
28
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| 7, 97, 997, 9973, 99991, 999983, 9999991, 99999989, 999999937, 9999999967, 99999999977, 999999999989, 9999999999971, 99999999999973, 999999999999989, 9999999999999937, 99999999999999997, 999999999999999989, 9999999999999999961
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
O'Hara, J. Rec. Math., 22 (1990), Table on page 278.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..200 [Jon Schoenfield verfied that these numbers are indeed all primes, Feb 02 2009]
Eric Weisstein's World of Mathematics, Previous Prime
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MATHEMATICA
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Table[a := 10^(n + 1); While[ ! PrimeQ[a], a-- ]; a, {n, 0, 30}] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 08 2006
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CROSSREFS
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Cf. A003617.
Cf. A033874
Sequence in context: A125590 A068694 A158579 this_sequence A093172 A074110 A155644
Adjacent sequences: A003615 A003616 A003617 this_sequence A003619 A003620 A003621
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KEYWORD
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nonn,nice,base
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 08 2006
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