This is a constant value representing the smallest realisable non-zero positive value of the number type.
The resulting value is approximately 5e-324
Although the MAX_VALUE is generally correct across implementations there are variations in the value of the MIN_VALUE constant.
ECMA 262 edition 2 - section - 184.108.40.206
ECMA 262 edition 3 - section - 220.127.116.11