I'd only do ^1285 for 4 and below and change it to ^3( for only x=5 and above) to make the equation more mathematically accurate.
Here's a table from your equation(y = (x-4)^1285):
X Y
0 -Infinity
1 -Infinity
2 -Infinity
3 -Infinity
4 0
5 1
6 Infinity
7 Infinity
8 Infinity
9 Infinity
10 Infinity
Here's mine:
if x ≥ 5 -> y = (x-4)^3
if x < 5 -> y = (x-4)^1285
X Y
0 -Infinity
1 -Infinity
2 -Infinity
3 -Infinity
4 -Infinity
5 1
6 8
7 27
8 64
9 125
10 216
The difference we can visibly see here, is that women will never consider a man 4 and below. And as a man goes from 5 and above, his SMV exponentially increases.