Question about ‘God plays dice’

Hello Rabbi Michael
In the book ‘God Plays Dice’, the probabilistic calculation of the evolution of life following the creation of mutations is made, and it seems that a given name is missing (or I missed it) – the number of attempts is given (~10^90), the number of possibilities as well (~10^390), but regarding the number of ‘islands’ – the stable outcomes – I did not see a clear calculation, only an estimate that it is a ‘minimal’ number. Did I miss the calculation? Is there another place to find it?

Thanks in advance.