Harlan Grove,

Thanks so much for your help with this.
The formula:
=IF(INDEX(FREQUENCY(Tag_number,NumberSought-{0.5;0}),2),NumberSought,"No
Match")
Appears to be working perfectly.

"<10^15"?

I fear it's been longer than I care to think about since I aced my algebra
regents exam.

That would be 10 to the 15th power? Correct?

-Kevin

"Harlan Grove" wrote in message
...
"Kevin" wrote...
...
I'm working with it now and I've reached something of a road block. The
formula works fine with tag numbers 0 thru 16. 17 and higher return "No
Match".

Can the formula be altered to handle higher numbers? Four digit numbers?
...
"Harlan Grove" wrote in message
...
=IF(INDEX(FREQUENCY(Tag_number,15-{0.000000000000001;0}),2),15,
"No Match")

If all the numbers for which you'd be searching were integers < 10^15,
change the formula to

=IF(INDEX(FREQUENCY(Tag_number,NumberSought-{0.5;0}),2),NumberSought,
"No Match")

Otherwise, you'll need to make the small number not as small, e.g.,

=IF(INDEX(FREQUENCY(Tag_number,NumberSought-{0.000001;0}),2),NumberSought,
"No Match")