private BigDecimal getEffectiveMinValue(FacesContext context, InputNumber component) {
        String minimumValue = component.getMinValue();
        if (minimumValue == null) {
            minimumValue = determineMinimumFromType(context, component);
        }
        if (minimumValue == null) {
            minimumValue = DEFAULT_MIN_VALUE;
        }

        try {
            return new BigDecimal(minimumValue);
        }
        catch (Exception e) {
            throw new IllegalArgumentException("Error converting  [" + minimumValue + "] to a decimal value for minValue", e);
        }
    }
Get the effective minimum Value (as interpreted in the AutoNumeric plugin)
@param context faces context
@param component the InputNumber component
@return the minimumValue property as BigDecimal, or the AutoNumeric default value if empty
primefaces/src/main/java/org/primefaces/component/inputnumber/InputNumberRenderer.java