DCT coefficient quantization factors

In JPEG, after passing the pixel values thru DCT computation, we
quantatize it b4 encoding the code. I understand tat the quantization
matrix given can be scaled by a factor.

DCT quantized = ROUND (DCTcoefficient/(Q*Scale Factor))

where Q is a value of the quantization matrix and
scale factor =
i) 50/Quality Factor for QF <50
ii) 2- QF/50 for QF>=50

My qn is to get the best quality factor, we set QF = 100, therefore
scale factor = 2-100/5 = 0
that means the DCT quantized value will be 0 as well???

thks

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