Hi FOlks
Cerberus -
This may save you some work.

Please find attached a zipped Excel spreadsheet analysis of submitted entries.
It contains -
- All NUMBER entries in submitted date order.
- A sorted equivalent.
- A count of NUMBER useage, (automated).
- An analysis of NUMBER useage, (automated).
Just -
- Pick your random number.
- Check against the NUMBER column, (scroll down for 0-1000 range).
If unused
repeat until a winner(s) found.
Analysis shows some interesting selections,
particularly WRT duplicates.
NUMBER 3 being the most popular with 8 entries.
<table x:str="" style="border-collapse: collapse;" border="0" cellpadding="0" cellspacing="0" width="342" height="134"><col style="width: 32pt;" width="42"> <col style="width: 131pt;" width="174"> <tbody><tr style="height: 12.75pt;" height="17"> <td style="height: 12.75pt; width: 32pt;" u1:num="" width="42" height="17">
Totals</td> <td style="width: 131pt;" width="174">
</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
532</td> <td>
Entries</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
647</td> <td>
Unused NUMBERs</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
245</td> <td>
Single NUMBER entries</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
109</td> <td>
Duplicate NUMBER entries</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
176</td> <td>
Sum of duplicate NUMBERs</td> </tr> <tr style="height: 12.75pt;" height="17"> <td class="xl24" style="height: 12.75pt;" x:num="" height="17">
8</td> <td>
Max duplicated NUMBER</td> </tr> </tbody></table>
HTH
ATB
Paul