A brief version of the story is contained in http://numerical.recipes/whp/on-iterated-prisoner-dilemma.ht...
You have flipped the roles of 20000 and 10^6 in your formulation.
A brief version of the story is contained in http://numerical.recipes/whp/on-iterated-prisoner-dilemma.ht...
You have flipped the roles of 20000 and 10^6 in your formulation.