9 rounds of hashing from 6 hashing functions (blake, bmw, groestl, jh, keccak, skein)
What coin did that first?
Another coin was SIC or Sifcoin - from a russian creator. I don't know if it was the first.
But look at these params - Inflatocoin
https://cryptocointalk.com/topic/676-sifcoin-sic-information/It goes to show that you can innovate, but if someone copy/pastes with better parameters, that coin will do better.
Quark does borrow hashing functions from SIC, but has significant differences:
1. Instead of 6 rounds of hashing, 9 rounds of hashing, with 3 of the rounds applying a random hash algorithm.
2. Different difficulty adjustment algorithm.
3. Different reward calculation algorithm.
4. Quark supports transaction comments (similar to Florin). This functionality will be exposed in the UI and RPC interface in a future release.