or all seeds are gotten by trying?

Amidst and spamming random seed. An amidst2^48 for finding seeds with exact same strongholds, I would watch a tutorial on that one

What are you attempting to find a seed for? also we've tried countless different ways, like amidst and such. Crafterdark and Azlef (to good programmers in our community) figured out that strongholds are seeded differently than most seeds, and you can find multiple seeds with the exact same strongholds (location and everything). So if you do find a seed with a VERY close stronghold, you can reverse engineer your way to another seed like that.

I ran with server 1.7.2 and got different spawn point to client 1.7.2

That shouldn't happen, although unless your doing random seed gltichless, run client

but it's a lot easier to find map with server(run the server with in.txt="stop" and it would generate the map and exit) tools don't work at all