public int getPPrime() {
    return pPrime;
  }
<pre>
<b>Input:</b> 64 bit hashcode

|---------w-------------| |------------p'----------|
10101101.......1010101010 10101010101 01010101010101
                                      |------p-----|

<b>Output:</b> 32 bit int

|b| |-q'-|  |------------p'----------|
 1  010101  01010101010 10101010101010
                        |------p-----|


The default values of p', q' and b are 25, 6, 1 (total 32 bits) respectively.
This function will return an int encoded in the following format

p  - LSB p bits represent the register index
p' - LSB p' bits are used for increased accuracy in estimation
q' - q' bits after p' are left as such from the hashcode if b = 0 else
     q' bits encodes the longest trailing zero runs from in (w-p) input bits
b  - 0 if longest trailing zero run is contained within (p'-p) bits
     1 if longest trailing zero run is computeed from (w-p) input bits and
     its value is stored in q' bits
</pre>
@param hashcode
@return
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/hll/HLLSparseRegister.java