What is the threshold for in TB for solo mining?

Any idea??
100TB?
150TB?
200TB?
how to calculate or understand better where is the threshold according to the entire PB network?

@ItalianMiner72 just divide your mining capacity with the whole netDiff and you'll have the probability of hitting a block. I believe if you are above 6080TB you could solo mine, but you could go perhaps for a week without wining a block, compared to the frequent payments you may get from mining in a pool.

well, I have one offsite (colo) miner with ~8 TB spare space, was hitting one block/fortnight. This will likely decrease to two months or more w/regard to diff. If you want a steady income, I'd say 100+TB is the minimum for going solo now, that would be ~"one block every two days".

i will give a try.. i'm near 90tb... i think in the next month i can reach 100tb...
can you explin better how to calculate probability to hit block in solo?
for example 50000(network in TB)/60(mine TB) = 833.. with an average time block of 140 secs i will get 1 block each 116620secs or 32,39hours??? but is impossible...

@ItalianMiner72, I think this is what you want (if I've done my math right):
Network size for July 3rd was 71,287 TB per burstcoin.biz.
71287/90 = 792.07777. So, on average, you should win 1 block out of every 792 blocks. Block times, on average, are four minutes. This equates to 360 blocks per day. 792/360 = 2.2, so as of July 3rd, you could reasonably expect to win a block every 2 days and 4 hours.
71287/100 = 712.87; 713/360 = 1.98 days, rounding up, call it 2 days.
So adding 10 TB would, on average, take 4 hours off of your time between blocks.
Want to win 1 block per day? I worked it backwards (71287 / ? = 360): you'll need 198 TB

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@ItalianMiner72 ok but what does it mean /90, /360 and /100???? 71287 are the network TB.
but what about /90???

@ItalianMiner72 you take the netdiff in TB (i.e. the daily averaged network size from here: http://burstcoin.biz/calculator)
and divide it by what you have. The result is your portion of the total network size, alias your chance to win a block.your size: 90 TB
network size: 66,162 TB
66162/90=735So your chance of winning a block is 1/735.
Because you possess 1/735th of the network.There are 360 blocks per day, so with 90 TB you'll mine a block every 735/360=2.013 days, on average.

ok i undesrtand!!! many thanx!!!