A248931 Decimal expansion of 2^1279 - 1, the 15th Mersenne prime A000668(15).

1, 0, 4, 0, 7, 9, 3, 2, 1, 9, 4, 6, 6, 4, 3, 9, 9, 0, 8, 1, 9, 2, 5, 2, 4, 0, 3, 2, 7, 3, 6, 4, 0, 8, 5, 5, 3, 8, 6, 1, 5, 2, 6, 2, 2, 4, 7, 2, 6, 6, 7, 0, 4, 8, 0, 5, 3, 1, 9, 1, 1, 2, 3, 5, 0, 4, 0, 3, 6, 0, 8, 0, 5, 9, 6, 7, 3, 3, 6, 0, 2, 9, 8, 0, 1, 2, 2, 3, 9, 4, 4, 1, 7, 3, 2, 3, 2, 4, 1, 8, 4, 8, 4, 2, 4

Offset

386,3

Comments

The 13th through the 17th Mersenne primes were found in 1952 by Raphael M. Robinson, using SWAC.

Links

Arkadiusz Wesolowski, Table of n, a(n) for n = 386..771

D. H. Lehmer, A New Mersenne Prime, Mathematics of Computation, vol. 6, No. 39 (1952), p. 205.

Wikipedia, Mersenne prime

Formula

Equals 2^A000043(15) - 1.

Example

10407932194664399081925240327364085538615262247266704805319112350403608...

Mathematica

RealDigits[2^1279 - 1, 10, 100][[1]] (* G. C. Greubel, Oct 03 2017 *)

Prog

(Magma) Reverse(Intseq(2^1279-1));
(PARI) eval(Vec(Str(2^1279-1)))

Crossrefs

Cf. A169684 = A000668(11), A169681 = A000668(12), A169685 = A000668(13), A204063 = A000668(14), A248932 = A000668(16), A248933 = A000668(17), A248934 = A000668(18), A248935 = A000668(19), A248936 = A000668(20).

Sequence in context: A298617 A221596 A195286 * A200501 A141433 A019111

Adjacent sequences: A248928 A248929 A248930 * A248932 A248933 A248934

Keyword

nonn,cons,easy,fini,full

Author

Arkadiusz Wesolowski, Oct 17 2014

Status

approved