public static function isPrime( $number )
	{
		Deprecation::getInstance()
			->setErrorVersion( '0.8.5' )
			->setExceptionVersion( '0.9' )
			->message( sprintf(
				'Please use %s (%s) instead',
				'public library "CeusMedia/Math"',
			 	'https://packagist.org/packages/ceus-media/math'
			) );
		if( $number < 2 )
			return false;
		$edge = floor( sqrt( $number ) );
		for( $i=2; $i<=$edge; $i++ )
			if( $number % $i == 0 )
				return false;
		return true;
	}