=begin pod

=TITLE class Int

    class Int is Cool does Real { ... }

C<Int> objects store integral numbers of arbitrary size. C<Int>s are immutable.

There are two main syntax forms for C<Int> literals

    123         # Int in decimal notation
    :16<BEEF>   # Int in radix notations

Both forms allow underscores between any two digits which can serve as visual
separators, but don't carry any meaning:

    5_00000     # five Lakhs
    500_000     # five hundred thousand

=head1 Methods

=head2 chr

    multi sub    chr(Int:D ) returns Str:D
    multi method chr(Int:D:) returns Str:D

Returns a one-character string, by interpreting the integer as a Unicode
codepoint number and converting it the corresponding character.

=head1 Operators

=head2 div

    multi sub infix:<div>(Int:D, Int:D) returns Int:D

Does an integer division, rounded down.

=head2 expmod

	multi sub    expmod (Int:D: Int $y, Int $mod) returns Int:D
	multi method expmod (Int:D: Int $y, Int $mod) returns Int:D

Returns the given C<Int> raised to the C<$y> power within modulus C<$mod>.

=head2 is-prime

	multi sub    is-prime (Int:D: Int $tries = 100) returns Bool:D
	multi method is-prime (Int:D: Int $tries = 100) returns Bool:D

Returns C<True> if this C<Int> is known to be a prime, or is likely to be a
prime based on a probabalistic Miller-Rabin test. C<$tries> is the maximal
number of iterations the test is allowed to do. 

Returns C<False> if this C<Int> is known not to be a prime.

=end pod