fix a unit test so it's sure to overflow 64bit machines
fix a unit test so it's sure to overflow 64bit machines

mcandre/factor,ceninan/factor,mcandre/factor,mcandre/factor,seckar/factor,kingcons/factor,erg/factor,erg/factor,mcandre/factor,littledan/Factor,erg/factor,erg/factor,cataska/factor,mcandre/factor,cataska/factor,seckar/factor,ceninan/factor,erg/factor,kingcons/factor,littledan/Factor,ceninan/factor,littledan/Factor,littledan/Factor,mcandre/factor,cataska/factor,mcandre/factor,kingcons/factor,kingcons/factor,cataska/factor,erg/factor,seckar/factor,ceninan/factor,erg/factor