2^-2 = 2.500E-1
2^-8 = 3.906E-3
2^-40 = 9.095E-13
2^-99 = 1.578E-30
2^-378 = 1.624E-114
2^-9000 = 5.371E-2710
2^-1457 = 2.508E-439
2^-1999 = 1.742E-602
2^-8999 = 1.074E-2709
2^-29 = 1.863E-9
