public static void main ( String [ ] args ) {
  Scanner scan = new Scanner ( System . in ) ;
  int p = scan . nextInt ( ) , max = scan . nextInt ( ) ;
  for ( int i = max ;
  i > p ;
  i -- ) {
    boolean good = true ;
    int f = i ;
    for ( int j = 2 ;
    j * j <= i ;
    j ++ ) {
      if ( f % j == 0 && j <= p ) {
        good = false ;
        break ;
      }
      while ( f % j == 0 ) f /= j ;
    }
    if ( good && ( f == 1 || f > p ) ) {
      System . out . println ( i ) ;
      return ;
    }
  }
  System . out . println ( - 1 ) ;
}

public static void main ( String [ ] args ) { Scanner scan = new Scanner ( System . in ) ; int p = scan . nextInt ( ) , max = scan . nextInt ( ) ; for ( int i = max ; i > p ; i -- ) { boolean good = true ; int f = i ; for ( int j = 2 ; j * j <= i ; j ++ ) { if ( f % j == 0 && j <= p ) { good = false ; break ; } while ( f % j == 0 ) f /= j ; } if ( good && ( f == 1 || f > p ) ) { System . out . println ( i ) ; return ; } } System . out . println ( - 1 ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (identifier)))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) body: (expression_statement (assignment_expression left: (identifier) right: (identifier)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (identifier)))))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (return_statement))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal)))))))