ojhPrime64cor function hashes
64-bit Prime ranks hash
Implementation
int ojhPrime64cor(Iterable<Rank> ranks) {
int max = 10;
int h = 1;
for (Rank r in ranks) {
max -= 1;
assert(max >= 0);
h *= _primes[0x0F & r.index];
}
return h;
}