Hi Mike! Maybe thats on purpose but I found it odd. ``` r library(bit64) median(1:2) #> [1] 1.5 median(as.integer64(1:2)) #> integer64 #> [1] 2 # even vector lengths are ok median(1:3) #> [1] 2 median(as.integer64(1:3)) #> integer64 #> [1] 2 ```