Improve exact integer hashing
Improve exact integer hashing

jasperla/gambit,BeImprovised/gambit,thewhimer/gambit,thewhimer/gambit,jasperla/gambit,thewhimer/gambit,thewhimer/gambit,jasperla/gambit,acenode/gambit,acenode/gambit,thewhimer/gambit,thewhimer/gambit,BeImprovised/gambit,acenode/gambit,BeImprovised/gambit,jasperla/gambit,acenode/gambit,BeImprovised/gambit