A098911 - OEIS

A098911

Table(n,2) read by rows giving k and j such that Mersenne-prime(k) - Mersenne-prime(j) - 1 is prime.

2, 1, 3, 2, 6, 2, 9, 6, 9, 7, 10, 9

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

EXAMPLE

(2^3-1)-(2^2-1)-1 = 5 = Mersenne-prime(2)-Mersenne-prime(1)-1 k=2 j=1 for n=1

(2^5-1)-(2^3-1)-1 = 23 = Mersenne-prime(3)-Mersenne-prime(2)-1 k=3 j=2 for n=2

(2^17-1)-(2^3-1)-1 = 131063 = Mersenne-prime(6)-Mersenne-prime(2)-1 k=6 j=2 for n=3

and 3,23,131063 are primes

CROSSREFS

KEYWORD

more,nonn,tabf

AUTHOR

Pierre CAMI, Oct 16 2004

STATUS

approved