Modulus of a Big Integer
The modulus of a bigz number a is
“unset” when a is a regular integer, a \in Z).
Or the modulus can be set to m which means
a in Z/mZ), i.e., all arithmetic with
a is performed ‘modulo m’.
modulus(a) modulus(a) <- value
x <- as.bigz(24)
modulus(x) # NULL, i.e. none
# x element of Z/31Z :
modulus(x) <- 31
x+x # 48 |-> (17 %% 31)
10*x # 240 |-> (23 %% 31)
x31 <- x
# reset modulus to "none":
modulus(x) <- NA; x; x. <- x
x <- x31
modulus(x) <- NULL; x
stopifnot(identical(x, as.bigz(24)), identical(x, x.),
identical(modulus(x31), as.bigz(31)))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.