|
Search: id:A129221
|
|
|
| A129221 |
|
Residues of the Lucas - Lehmer primality test for M(13) = 8191. |
|
+0
8
|
|
| 4, 14, 194, 4870, 3953, 5970, 1857, 36, 1294, 3470, 128, 0
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
Since a(11) = 0, M(13) = 8191 is prime.
|
|
LINKS
|
Eric Weisstein's World of Mathematics, Lucas Lehmer Test.
Wikipedia, Lucas Lehmer Primality Test).
|
|
FORMULA
|
a(0) = 4 a(n) = a(n-1)^2 mod 2^p-1 Last term: a(p-2)
|
|
EXAMPLE
|
a(11)= 128^2 - 2 mod 8191 = 16382 mod 8191 = 0
|
|
CROSSREFS
|
Cf. A095847, A003010, A129219, A129220, A129222, A129223, A129224, A129225, A129226, A001348.
Adjacent sequences: A129218 A129219 A129220 this_sequence A129222 A129223 A129224
Sequence in context: A080986 A132555 A129220 this_sequence A129222 A129223 A129224
|
|
KEYWORD
|
fini,full,nonn
|
|
AUTHOR
|
Sergio Pimentel (ferdiego(AT)suddenlink.net), Apr 04 2007
|
|
|
Search completed in 0.002 seconds
|
