> For the complete documentation index, see [llms.txt](https://kunalwalavalkar.gitbook.io/write-ups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kunalwalavalkar.gitbook.io/write-ups/cryptohack/general/encoding/bytes-and-big-integers.md).

# Bytes and Big Integers

> Python's PyCryptodome library implements this with the methods `bytes_to_long()` and `long_to_bytes()`. You will first have to install PyCryptodome and import it with `from Crypto.Util.number import *`. For more details check the [FAQ](https://cryptohack.org/faq/#install).

### Solution

```python
from Crypto.Util.number import *

integer = 11515195063862318899931685488813747395775516287289682636499965282714637259206269
flag = long_to_bytes(integer).decode()
print(f"{flag}")
```