Talk:Lucas-Carmichael number

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Are there infinitely many Lucas-Carmichael numbers? Is there an approximate formula for the number of Lucas-Carmichael numbers less than a given number N?

[edit] Number of prime factors?

The article quotes examples of Lucas-Carmichael numbers with 3, 4 and 5 factors. I think there can't be just 2 factors. Can there be arbitrarily many?

[edit] Formula for these numbers?

Is there any formula or procedure for calculating these numbers?

{NB: I made all the above comments before I created my account.--Poetlister 18:00, 24 November 2006 (UTC)}

[edit] Named after?

That would be Robert Daniel Carmichael and ... ?? Stumps 09:29, 24 November 2006 (UTC)

Edouard Lucas--Poetlister 18:00, 24 November 2006 (UTC)
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