type
LongestCard = Cardinal attribute (Size = BitSizeOf (LongestInt));
LongestCard is GPC's longest-possible unsigned integer type. Currently, this is the same as LongCard. On some platforms it is 64 bits wide and thus has a range of 0 .. 18446744073709551615.
There are lots of other integer types in GPC, see Integer Types.
LongestCard is a GNU Pascal extension.
program LongestCardDemo;
var
a: LongestCard;
begin
a := 42;
WriteLn (a)
end.