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A028335 Number of digits in n-th Mersenne prime.
(Formerly N0189)
8
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; text; internal format)
OFFSET

1,3

COMMENTS

Apply p->floor(p*log(2)/log(10))+1 to A000043.

REFERENCES

A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 19.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

LINKS

Table of n, a(n) for n=1..41.

C. K. Caldwell, Mersenne Primes

R. Mestrovic, Euclid's theorem on the infinitude of primes: a historical survey of its proofs (300 BC--2012) and another new proof, arXiv preprint arXiv:1202.3670, 2012.

CROSSREFS

See A000043, which is the main entry for this sequence. Cf. A000668.

Sequence in context: A009490 A243930 A064778 * A007464 A210733 A265564

Adjacent sequences:  A028332 A028333 A028334 * A028336 A028337 A028338

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Enoch Haga, Dec 18 2001

One more term from Harry J. Smith, Apr 17 2003

4053946 from Omar E. Pol, Oct 28 2007

STATUS

approved

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Last modified June 29 03:09 EDT 2017. Contains 288858 sequences.