Research Cost Calculation/Formula?

What is the formula for calculating the cost of researching a given technology?

I have tried to derive a formula by checking the cost for each tech after each discovery, the cost after each of the first 10 discoveries are, as far as I can determin: (Giant, Chalenging)

0 : 100%
1 : 101%
2 : 102%
3 : 103.75%
4 : 105%
5 : 106%
6 : 107,5%
7 : 108.8%
8 : 110%
9 : 111.2%
10: 112.4%

Unfortunately the error factor on these numbers are significant, as most techs in this test cost less than 200.
349 views 2 replies
Reply #1 Top
The last statement I saw was a cumulative +1% per tech, but that was a few versions ago.
Reply #2 Top
Hmm. My testing so far doesn't seem to confirm this. With 71 techs discovered, I had a cost of 140%, with 72 it was 142%. So it would be nice to hear from Stardoc what the current formula is. Arround 10 of these were traded for, or gifts from the AI.