Assuming your numbers are in A1:A3000
In B1:B3000 enter 1
C1 =SUMPRODUCT(A1:A3000, B1:B3000), C2 = Y (your target), C3 = ABS(C1-C2)

In Solver
Changing cells B1:B3000
Constraints C3=0 and B1:B3000 bin (binary - i.e. 0 or 1)
Solve

Does it work with your data?

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Bernard V Liengme
www.stfx.ca/people/bliengme
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"simmerdown" wrote in message
...
No, I don't care. At least that would narrow down the field, then I could
take it from there.

"Bernard Liengme" wrote:

You could do this with Solver but with 3000 number, it is unlikely that
there is a unique solution.
Do you care?
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Bernard V Liengme
www.stfx.ca/people/bliengme
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"simmerdown" wrote in message
...
I have a list of numbers (approximately 3000) that sum to X. However,
my
control figure is Y.

Is there a formula that will evaluate the list of 3000 numbers and
return
those that when summed, equal the difference between X and Y?