Primecoins is a great idea, helping science, like curecoin.
Problem with it is the lack of cap of inflation...
Shame if these 2 great coins die.
Sunny King replied crypto_coiner who posted the followings on July 27, 2014 at chatroom of peercointalk.org:
"Thanks for your support of primecoin. I think it's fair to say that I designed primecoin not only as a breakthrough as scientific computing apparatus, but actually as a quality replacement of other more dominant PoW cryptocurrencies as they ignore the long term security challenges. Rebranding though is not necessary I think, at least the English name Primecoin does not really limited it to prime numbers, so I think the name is fine as it is. It may appear that primecoin has less development support at this point, but at least from my point of view primecoin would have my support. My current undertaking on sidechains, might even be tried on primecoin first, due to it's different properties. Although this shouldn't be taken as a promise. But in any case, if sidechains materialize primecoin would also have my support at some point."
"Hi crypto_coiner, long-term bitcoin security relies mainly on transaction fees. primecoin realistically would continue to have some subsidy long term, so less reliant on transaction fees for security. I am of the opinion that the PoW sector and PoS sector would coexist for a long time. Although recently primecoin was lackluster in the PoW market. There was no plan to combine the two currencies, they were designed as two separate networks, both with strong security. Peercoin is better as savings instrument, primecoin is better as transactional medium. Best Regards,"
Sunny King also talked Primecoin in the interview by Let's Talk Bitcoin: The Real Sunny
http://letstalkbitcoin.com/blog/post/the-real-sunny 
