Leica M3 serial # is a palindrome!

<p>Does it matter? It's xyzzyx.</p>

?! They did not deliberately avoid palindromic serial numbers. So they occurred.

<p>I believe you have one of 216 palindromic M3s. The rarest M3 is the Fibonacci model, of which only one was made.</p>

<p>Dave, so the zero is dropped, right? Since no serial numbers start with "0". Leica probably gave it to a mathematician?</p>

<p>AFAICT all six-digit M3 serial numbers started with 7, 8, or 9. So 3 x 9 x 8.</p>

<p>The Fibonacci is 832040.</p>

<p>OK, this is fascinating!</p>

<p>I understand 3 x 9 x 8 = 216 if the first three digits must all be different as in the original query. But would the number not still be palindromic if some of the digits repeated, such as 788887 or 886688 or even 999999? It seems the formula covering that possibility would be 3 x 10 x 10 = 300.</p>

<p>I must now hurry home to see if I have the Fibonacci M3. (Much likelier than winning the lotto.)</p>

<p>I think you're right about 3 x 10 x 10, if we allow repeated digits. And as for the 216 palindromic M3s, exactly zero of them are prime.</p>

<p>Ah, well. Turns out my camera has a seven-digit number: 1109318.</p>

<p>Not Fibonacci, not palindromic, and not prime (2 x 7 x 17 x 59 x 79).</p>

<p>I didn't win the Power Ball either.</p>