As a reference point, on Ti89 it takes about a minute to factorize 120bit RSA-style product of two primes, extrapolating from that you probably can break 128bit RSA on that without changing batteries.
Yes, they state that 1024 bit RSA was used but they also mention that older versions of the browser mistakenly used 128 bit RSA... probably because they were using 128 bit AES and some developer didn't know any better! Or maybe the government told them 128 bit was the maximum they were allowed to use on any cipher whether it was symmetric or asymmetric. https://imgur.com/a/XA91L
As a reference point, on Ti89 it takes about a minute to factorize 120bit RSA-style product of two primes, extrapolating from that you probably can break 128bit RSA on that without changing batteries.