public static BigInteger decode(String s) {
        byte[] bytes = Base64.decodeBase64(s);

        BigInteger bi = new BigInteger(1, bytes);
        return bi;
    }
public static BigInteger decode ( String s ) { byte [ ] bytes = Base64 . decodeBase64 ( s ) ; BigInteger bi = new BigInteger ( 1 , bytes ) ; return bi ; }
This is in use by FAT only at the writing time