Mention impact factor or conference acceptance rate in CV
You should not put journal impact factors in your CV.  Here's why:

By doing so, you imply that the IF is a useful indicator of the value of individual article(s) you have published in a journal.  However, the IF is not a useful indicator in this regard, and was never intended to be.

You also give the impression that your research does not stand on its own merits -- that it is worthwhile only because it was stamped by a high IF journal.  If your research really is important, use the grant application to explain why.

As other comments have stated, anyone in the field already knows the good journals -- and they're often not the ones with the highest impact factors.  IF is poorly correlated with expert opinion.

You may still disagree, so I will appeal to your self-interest.  Including the IF will leave a poor impression with evaluators who understand the limitations of the IF.  They may even be signers of the Declaration on Research Assessment (DORA), which states among other things:



...the Journal Impact Factor has a number of well-documented deficiencies as a tool for research assessment. These limitations include: A) citation distributions within journals are highly skewed [1–3]; B) the properties of the Journal Impact Factor are field-specific: it is a composite of multiple, highly diverse article types, including primary research papers and reviews [1, 4]; C) Journal Impact Factors can be manipulated (or &quot;gamed&quot;) by editorial policy [5]; and D) data used to calculate the Journal Impact Factors are neither transparent nor openly available to the public [4, 6, 7].
General Recommendation: Do not use journal-based metrics, such as Journal Impact Factors, as a surrogate measure of the quality of individual research articles, to assess an individual scientist's contributions, or in hiring, promotion, or funding decisions.

In short, by trying to use the IF to establish value of your research, you're only broadcasting your ignorance, as even Wikipedia can tell you:

It is important to note that impact factor is a journal metric and should not be used to assess individual researchers or institutions.