A248934 Decimal expansion of 2^3217 - 1, the 18th Mersenne prime A000668(18).

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

Offset: 969

Author

Arkadiusz Wesolowski, Oct 17 2014

Keywords

• nonn
• cons
• easy
• fini
• full

Comments

The prime was found on September 8, 1957, by Hans Riesel, using BESK.

Examples

			25911708601320262777624676792244153094181888755312542730397492316187401...
		

Links

• Arkadiusz Wesolowski, Table of n, a(n) for n = 969..1937
• Hans Riesel, A New Mersenne Prime, Mathematics of Computation, vol. 12 (1958), p. 60.
• 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), A248935 = A000668(19), A248936 = A000668(20).

Programs

Magma

Reverse(Intseq(2^3217-1));

Mathematica

RealDigits[2^3217 - 1, 10, 100][[1]] (* G. C. Greubel, Oct 03 2017 *)

PARI

eval(Vec(Str(2^3217-1)))

Formula

Equals 2^A000043(18) - 1.