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.
Integer Types, Subrange Types.