A noble accomplishment.
We had to run Darwin Central's Babbage Analytical Engine for 2 days to confirm that 1500 is indeed prime. Another triumph for DC's crack mathematologists. We are now searching to see if there may exist yet higher primes, but some of the brass teeth are wearing out and will require replacement (including shipping from London to the Galapagos). The invoice for 900 guineas will be passed on to the Grandmaster's Counting House.