Here, the quantile of Poisson distribution for the last two values of X creates an infinity value.
I am not able to digest it. I will be glad if you can help out in getting these two values. It is supposed to be approx to them i.e. 119 and 139.
Thanks
> .Machine$double.eps
[1] 2.220446e-16
> qpois(1- .Machine$double.eps, m)
[1] Inf
> qpois(1- .Machine$double.eps*2, m)
[1] 95
A computer has finite precision. When you're close enough to 1, it's considered the same as 1, and of course the quantile q such that P(x < q) = 1 is infinite.