Using the example in this article as a demo, on AWS, it takes $75 and 4 hours to crack a RSA-512 key, and it was the 2015 number. So it's certainly the correct

Using the example in this article as a demo, on AWS, it takes $75 and 4 hours to crack a RSA-512 key, and it was the 2015 number. So it's certainly the correct choice here. https://arstechnica.com/information-technology/2015/10/breaking-512-bit-rsa-with-amazon-ec2-is-a-cinch-so-why-all-the-weak-keys/ https://arstechnica.com/information-technology/2015/10/break...