It's 1/5 of the seconds spent in expansion to the power of how many of of the upgrade you have. so 300 seconds or 5 min with A2 at lvl 5 is: (300/5)^5 = 7.776e8
Do you mean "Remove the max prestige limit"? If so, then it means that the maximum amount of prestiges you can have is infinite. At first it was 15, then 50 and then infinite.
 "Energy Generator"){kind=icon}
 "Pel"){kind=icon}
 "Cosmos Quest: The Origin"){kind=icon}
It's 1/5 of the seconds spent in expansion to the power of how many of of the upgrade you have. so 300 seconds or 5 min with A2 at lvl 5 is: (300/5)^5 = 7.776e8