very slow download of LO 5.3.1

Since Friday evening I experience a problem with downloading LO 5.3.1. The
download indicator shows 2-3 hours, however having downloaded previous
versions earlier I experienced downloading within very few minutes. My
internet connection is all right. Is the issue somewhere en route or is
there something wrong on the server? Thank you for info.

There is not just one server. There many "mirror" servers in locations
across the globe. When you click the download button, the website server
selects and redirects you to a "mirror" close to your assessed location.
It is possible that the selected "mirror" was experiencing problems at
the time you tried download. You could retry the website download page
again, or choose a "mirror" from those listed on this page:
https://download.documentfoundation.org/mirmon/allmirrors.html
The location you choose is not critical, but choosing one reasonably
close to your location is normally better (ie, fewer internet hops) than
one on a different continent. Look for one with 3 *** in the priority
column and click it's HTTP or FTP link.

You're hitting a slow/problematic mirror, happens sometimes...

Thanks for the hints, mirrors:

http://de-rien.fr/tdf/libreoffice/stable/5.3.1/win/x86/LibreOffice_5.3.1_Win_x86.msi
http://ftp.byfly.by/pub/tdf/libreoffice/stable/5.3.1/win/x86/LibreOffice_5.3.1_Win_x86.msi

work good for me.