|
Search: id:A153581
|
|
|
| A153581 |
|
Pseudoprimes to bases 2,3,5 and 7 which are neither 1 nor Carmichael numbers A002997 |
|
+0
3
|
|
| 721801, 8646121, 10403641, 22885129, 36307981, 42702661, 46094401, 48064021
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
MATHEMATICA
|
Select[Range[5*10^7], ! PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 && PowerMod[5, # - 1, # ] == 1 && && PowerMod[7, # - 1, # ] == 1 && Mod[ #, CarmichaelLambda[ # ]] != 1 &] (*Ray Chandler*)
|
|
CROSSREFS
|
A002997, A083737, A122780, A153508, A153513, A153514, A153515, A153519, A153580
Sequence in context: A102501 A015346 A153580 this_sequence A100383 A156867 A156868
Adjacent sequences: A153578 A153579 A153580 this_sequence A153582 A153583 A153584
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ray Chandler & Artur Jasinski (grafix(AT)csl.pl), Dec 28 2008
|
|
|
Search completed in 0.002 seconds
|
