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A153095
Least m(n) such that k(n)*m(n)^n*(m(n)^n-1)+j is prime with j= -1 or 1 or both and least possible k(n) with 1<m(n)<10
2
2, 2, 3, 2, 2, 3, 3, 5, 2, 2, 2, 3, 8, 7, 5, 4, 2, 2, 4, 3, 6, 2, 2, 5, 4, 7, 6, 4, 3, 2, 2, 2, 2, 6, 3, 3, 7, 2, 2, 2, 5, 2, 2, 3, 2, 2, 2, 5, 7, 2, 9, 5, 4, 4, 2, 2, 2, 8, 7, 4, 8, 4, 6, 5, 4, 5, 5, 4, 3, 9, 2, 2, 6, 3, 8, 8, 4, 2, 4, 8, 6, 2, 2, 4, 4, 5, 6, 4, 4, 8, 4, 6, 4, 7, 3, 4, 6, 7, 5, 2
OFFSET
1,1
EXAMPLE
1*2^1*(2^1-1)+1=3 prime so m(1)=2 1*2^2*(2^2-1)-1=11 as 13 so m(2)=2 1*2^3*(2^3-1)-1=55 composite 1*2^3*(2^3-1)+1=57 composite 1*3^3*(3^3-1)-1=71 prime as 73 so m(3)=3
KEYWORD
nonn
AUTHOR
Pierre CAMI, Dec 18 2008
STATUS
approved