DECLARE @i INT =2;
DECLARE @max INT =1000;
DECLARE @sqrt DECIMAL (10,4)= 0; 
DECLARE @wholenum INT = 0;
DECLARE @j INT =2;
DECLARE @isPrime BIT;
DECLARE @output VARCHAR(MAX)=''

WHILE @i <= @max 
BEGIN
   SET @sqrt= SQRT(@i)
   SET @wholenum= FLOOR(@sqrt)
   SET @isPrime = 1
   
   WHILE @j <=@wholenum
   BEGIN
      IF @i % @j = 0 
      BEGIN
       SET @isPrime = 0
      BREAK;
      END
      SET @j= @j+1 
   END 
   
  
IF @isPrime = 1
BEGIN 
    IF LEN(@output) > 0
        SET @output = @output + '&' + CAST(@i AS VARCHAR);
    ELSE
        SET @output = CAST(@i AS VARCHAR);
END

   
   SET @i = @i+1 
   SET @j=2
END


PRINT @output