Explanation from an article referenced by the linked article[1]:
Most of the digits were fixed while the rest could be brute-forced using some useful properties.
[1] https://www.futilitycloset.com/2017/09/10/trinity-hall-prime...
Most of the digits were fixed while the rest could be brute-forced using some useful properties.
[1] https://www.futilitycloset.com/2017/09/10/trinity-hall-prime...
> approximately one in every 6200 2688-digit numbers is prime.
So if you're lucky, you only need to brute force the last 4 digits! Maybe 5 if you're unlucky. In either case, that's a lot less work than I imagined. And of course you can skip all the even numbers.