This is the 847th most frequent Korean word.
현재까지
"Up to now" or "until now."
In this sentence, '현재까지' is used to indicate the timeframe up to the present moment to highlight that the fact remained unknown until the specified time.
현재까지 많은 사람들이 그 사실을 몰랐습니다.
Until now, many people were unaware of that fact.
Here, '현재까지' emphasizes the ongoing success of the project up to the current point.
그 프로젝트는 현재까지 순조롭게 진행되고 있습니다.
The project has been progressing smoothly up to the present.
In this case, '현재까지' refers to reviewing or considering information collected up to this moment.