|
|
A020170
|
|
Pseudoprimes to base 42.
|
|
1
|
|
|
205, 451, 529, 559, 697, 1105, 1247, 1441, 1541, 1763, 1765, 1807, 1891, 1921, 1991, 2465, 2665, 5371, 5611, 5977, 6001, 7345, 7421, 8041, 8749, 9773, 10585, 10621, 11041, 12167, 12403, 13333, 13981, 14473, 14491, 14981, 15457, 17611, 18721, 22399
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Composite numbers n such that 42^(n-1) == 1 (mod n). - Michel Lagneau, Feb 18 2012
|
|
LINKS
|
|
|
MATHEMATICA
|
base = 42; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* T. D. Noe, Feb 21 2012 *)
|
|
CROSSREFS
|
Cf. A001567 (pseudoprimes to base 2).
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|