I tried for more than a day, but I was unlucky. Whenever I switched to pool mining for a few hours though, my miners found a few blocks...
I gave up on solo mining for now, as I get about 150,000 coins per hour pool mining and according to this difficulty it would take about 3 hours for my miners to find one block. One block can only be worth max. 500,000 coins. Ppool mining for 3 hours gives me around: 3 * 150,000 = 450,000. Plus when you are solo mining you might not always get the biggest block rewards (like 25,000) , whereas when you are pool mining it is spread much more in your favor.
My 5 cents...
Devastating news - PoW is over friend.
Seriously? Seriously.
EDIT: Well that'll teach me for having a few glasses of pinot and posting in the wrong thread... apologies for the inappropriate sarcasm :S
PoW is still going for ZEIT, I should know I'm mining the thing! FFS