public void testConstructorRandom(){
  int bitLen=75;
  Random rnd=new Random();
  BigInteger aNumber=new BigInteger(bitLen,rnd);
  assertTrue("incorrect bitLength",aNumber.bitLength() <= bitLen);
}

public void testConstructorRandom ( ) { int bitLen = 75 ; Random rnd = new Random ( ) ; BigInteger aNumber = new BigInteger ( bitLen , rnd ) ; assertTrue ( "incorrect bitLength" , aNumber . bitLength ( ) <= bitLen ) ; }
create a random number of 75 bits length .
