Matching 2 columns of numbers

[los7]

Hello everyone, really need your help

This to me sounds so simple, but i've been using excel so much in the past month, my brain has turned to jelly. I am at the end of my tether with the job i am doing.
Basically, in the picture, you will see 2 columns with numbers in them. I need to know which numbers match and which ones dont. The list of numbers on the left goes down for ages, while the list on the right probably goes only halfway.(twice as many numbers on the left basically)
\1
some of the numbers on the right might have duplicates, but i dont think thats a problem.
The end result, i would like the numbers that match to be highlighted.
to sum it up, the numbers on the left are product numbers, the numbers on the right are image names that i got from a txt dump of the folder with the images in. I need to match the image names with the product numbers to see which products i have pictures for. This seems like such a long winded way of explaining it. Can anyone help me before i lose my hair?

Thanks in advance

Steve

[NBVC]

Try:

=Isnumber(Match(I2,A:A,0)) copied down

or

=Isnumber(Match(A2,I:I,0))

depending on what you want to match to what list...

TRUE means matches found.

[los7]

thanks for the extremly fast reply. Your first simple formula worked a treat. Thank you very much