Big number arithmetic
Basic operations for working with large integers. The bignum
function converts a positive integer, string or raw vector into a bignum type.
All basic Arithmetic and Comparison operators such as
+, -, *, ^, %%, %/%, ==,
!=, <, <=, > and >= are implemented for
bignum objects. The
Modular exponent
(a^b %% m) can be calculated using bignum_mod_exp
when b is too large for calculating a^b directly.
bignum(x, hex = FALSE) bignum_mod_exp(a, b, m) bignum_mod_inv(a, m)
x |
an integer, string (hex or dec) or raw vector |
hex |
set to TRUE to parse strings as hex rather than decimal notation |
a |
bignum value for |
b |
bignum value for |
m |
bignum value for |
# create a bignum
x <- bignum(123L)
y <- bignum("123456789123456789")
z <- bignum("D41D8CD98F00B204E9800998ECF8427E", hex = TRUE)
# Basic arithmetic
div <- z %/% y
mod <- z %% y
z2 <- div * y + mod
stopifnot(z2 == z)
stopifnot(div < z)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.