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A129222
Residues of the Lucas - Lehmer primality test for M(17) = 131071.
8
4, 14, 194, 37634, 95799, 119121, 66179, 53645, 122218, 126220, 70490, 69559, 99585, 78221, 130559, 0
OFFSET
0,1
COMMENTS
Since a(15) = 0, M(17) = 131071 is prime.
LINKS
Eric Weisstein's World of Mathematics, Lucas Lehmer Test.
FORMULA
a(0) = 4, a(n) = a(n-1)^2 mod 2^p-1. Last term: a(p-2).
EXAMPLE
a(15) = 130559^2 - 2 mod 131071 = 0.
KEYWORD
fini,full,nonn
AUTHOR
Sergio Pimentel, Apr 04 2007
STATUS
approved