PyCharm versions vs CentOS version

Hi all,

I'm trying to install PyCharm on an air-gapped system that is stuck in time at CentOS 6.10.  I don't have root, nor sudo access.  I've determined that the latest PyCharm 2019.3.3 is failing due to external dependencies such as a current JRE and GLIBC.

I believe I'll need to install a back-level version, but rather than trying each one, working backwards until one works, I was hoping someone could tell me the most recent version that might work with the following constraints?

Thanks,

   Jim