A248935 Decimal expansion of 2^4253 - 1, the 19th Mersenne prime A000668(19).

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

Offset

1281,2

Comments

This prime and the 20th Mersenne prime were found in 1961 by Alexander Hurwitz, using IBM 7090.

Links

Arkadiusz Wesolowski, Table of n, a(n) for n = 1281..2561

Alexander Hurwitz, New Mersenne Primes, Mathematics of Computation, vol. 16, No. 78 (1962), pp. 249-251.

Wikipedia, Mersenne prime

Formula

Equals 2^A000043(19) - 1.

Example

19079700752443907380746804296952917366935699474994017739474188267352897...

Mathematica

Realdigits[2^4253 - 1, 10, 100][[1]] (* G. C. Greubel, Oct 03 2017 *)

Prog

(Magma) Reverse(Intseq(2^4253-1));
(PARI) eval(Vec(Str(2^4253-1)))

Crossrefs

Cf. A169684 = A000668(11), A169681 = A000668(12), A169685 = A000668(13), A204063 = A000668(14), A248931 = A000668(15), A248932 = A000668(16), A248933 = A000668(17), A248934 = A000668(18), A248936 = A000668(20).

Sequence in context: A298743 A181446 A097669 * A202955 A019820 A019985

Adjacent sequences: A248932 A248933 A248934 * A248936 A248937 A248938

Keyword

nonn,cons,easy,fini,full

Author

Arkadiusz Wesolowski, Oct 17 2014

Status

approved