I don't know how to calculate the smallest non-zero denorm.
okay maybe i know a little.

so the smallest denorm is this right?
s exp fraction
0 [000 0000 0] 000 0000 0000 0000 0000 0001

and the formula for floating points is this

1 * 2^-127 * (2^-23) + 1

how is this = 2^149???