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A129223
Residues of the Lucas - Lehmer primality test for M(19) = 524287.
8
4, 14, 194, 37634, 218767, 510066, 386344, 323156, 218526, 504140, 103469, 417706, 307417, 382989, 275842, 85226, 523263, 0
OFFSET
0,1
COMMENTS
Since a(17) = 0, M(19) = 524287 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(17) = 523263^2 - 2 mod 524287 = 0.
KEYWORD
fini,full,nonn
AUTHOR
Sergio Pimentel, Apr 04 2007
STATUS
approved