Carmichal number 561
561 is the smallest Carmichael number in the ring of integers. However it is only a pseudoprime in the ring of Gaussian integers. We can use pari to find the bases to which 561 is a pseudoprime. I found it is pseudoprime to bases 12 + i, 22 +i, 33 + i and 44 + i. Needless to say it is a pseudoprime to other bases too. More on this later.
|Title||Carmichal number 561|
|Date of creation||2015-07-12 6:12:21|
|Last modified on||2015-07-12 6:12:21|
|Last modified by||akdevaraj (13230)|