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

Author

Arkadiusz Wesolowski, Oct 17 2014

Keywords

• nonn
• cons
• easy
• fini
• full

Comments

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

Examples

			19079700752443907380746804296952917366935699474994017739474188267352897...
		

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

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).

Programs

Magma

Reverse(Intseq(2^4253-1));

Mathematica

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

PARI

eval(Vec(Str(2^4253-1)))

Formula

Equals 2^A000043(19) - 1.