For scrypt mining (and scrypt-jane) it takes 65536 hashes to get a share of diff 1. It also takes 65536 shares (diff 1) for every point of difficulty to find a block. This doesn't seem to be the case for QRK. Does anyone know these values for QRK?
That's not entirely right.
IMHO there is a somewhat defacto standard
for stratum only, where the diff for scrypt based coins is a 65536 multiply if the original diff which the wallet reports.
So Bitcoin, Litecoin, and so on all require
at average for a wallet-diff 1 2^32 hashes (means 65536*65536)
Quarkcoin and quarkcoin clones are "one byte off", means a wallet-diff 1 needs
at average 2^24 hashes
Since scrypt is much slower than the sha stuff, scrypt based coins started with a much lower difficulty (i think 256*128 times lower) than bitcoin based ones.
I don't know if stratum at first only supported integer diffs and not the needed 0.00xxx diffs, or whatever the reason was, somehow on stratum the coins diff (as reported by the wallet) is multiplied by 65536.
As said for Quark: Diff 1 is 2^24. Stratum shouldn't modify this value. At least i didn't code any reversing of stratum diff in the minerd.
(If i did write garbage, please correct me)
Sounds like someone switched off a botnet (or his boss found out). The hashrate on the few p2pools I checked, including mine, is rather stable. Also, was the diff really above 950? I don't look for the diff often, didn't notice that.
Also we have some mainly 1:1 clones using the quark hashing algorithm