Compares this BigInteger with the specified Object for equality.
@param x Object to which this BigInteger is to be compared.
@return {@code true} if and only if the specified Object is a
BigInteger whose value is numerically equal to this BigInteger.
Compares this BigInteger with the specified Object for equality.
@param x Object to which this BigInteger is to be compared. @return {@code true} if and only if the specified Object is a BigInteger whose value is numerically equal to this BigInteger.