The end game is to switch to a post-quantum algorithm.
Essentially something that both quantum and classical computers cannot crack/brute force.
I would look into lattice-based crypto. It is one of the strongest candidates under review by NIST for post-quantum public/private key mechanisms.
Re:RSA Algorithm
by LocalRSAExpert on Sunday February 16, 2020 @07:12AM
(#22341197)
Yes, between 100 GB and 1 TB of private key does it.
Citation, for those curious:
Does increasing the size of the key get around this problem, if not is there any solution to this?