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A028335
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Number of digits in n-th Mersenne prime.
(Formerly N0189)
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4
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1, 1, 2, 3, 4, 6, 6, 10, 19, 27, 33, 39, 157, 183, 386, 664, 687, 969, 1281, 1332, 2917, 2993, 3376, 6002, 6533, 6987, 13395, 25962, 33265, 39751, 65050, 227832, 258716, 378632, 420921, 895932, 909526, 2098960, 4053946, 6320430, 7235733
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Apply p->floor(p*log(2)/log(10))+1 to A000043.
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REFERENCES
| N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 19.
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LINKS
| C. K. Caldwell, Mersenne Primes
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CROSSREFS
| See A000043, which is the main entry for this sequence. Cf. A000688.
Sequence in context: A034890 A009490 A064778 * A007464 A064764 A123131
Adjacent sequences: A028332 A028333 A028334 * A028336 A028337 A028338
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KEYWORD
| nonn,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Enoch Haga (Enokh(AT)comcast.net), Dec 18 2001
One more term from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Apr 17 2003
4053946 from Omar E. Pol (info(AT)polprimos.com), Oct 28 2007
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