Need help using rand() with shortcode button more efficiently

I’m working on creating a shortcode button that can generate a random link in a more user friendly way. Below is what I currently have and it does function with the user input this way:

[btnrandom min="23" max="46" text="Go somewhere with a random value from 23 to 46"]

and the code for the shortcode is as follows:

function ac_buttonrandom( $atts ) {
	extract( shortcode_atts( array(
		'min' => '',
		'max' => '',
		'text' => 'Continue',
	), $atts ) );
	$randompage = rand($min, $max);
	return "
		<div class='tease-button tease-button-random'><a href='#$randompage'>$text</a></div>
	";
}
add_shortcode( 'btnrandom', 'ac_buttonrandom' );

What I would like is for the shortcode to function more like this:

[btnrandom random="23, 46" text="Go somewhere with a random value from 23 to 46"]

However a single value doesn’t seem to work with rand(); properly. I’m sure this is a simple fix and I’m a beginner when it comes to php.

Thanks!