Searching for repeated numbers in the same column

J

JLatham

In the future, put your question in the body of the message, please. We
cannot respond to empty messages (title only).

Assume your numbers are in column A, from row 2 down to row 1044
In any available column, put this formula on row 2:
=CountIf($A$2:$A$1044,A2)
and fill the formula down to row 1044.

It will show a value of 1 where the number in column A is unique to the
list, it will show a value greater than 1 where multiple occurrences of the
number on that row appear in the list.
 

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