// RESULT: 2.956390380859375E-5 (=31/(2^20))
	Pmin=? [ F ab=1 & x>=15 {ab=0 & x=0} ];
	// RESULT: 2.956390380859375E-5 (=31/(2^20))
	Pmax=? [ F ab=1 & x>=15 {ab=0 & x=0} ];