> For the complete documentation index, see [llms.txt](https://writeups.ayweth20.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://writeups.ayweth20.com/2021/dvctf-to-join-davincicode/crypto/baby-rsa.md).
# Baby RSA
**Category:** Crypto - **Points:** 10 - **Solves:** 41\
**Description:** Wow, this time I can't compute the the private key! Or can I?
**Infos:**
> N= 0x25b8f38aed4a22b31dde75e46e276d0d\
> e= 0x10001\
> ct= 0x10891034ce51c23bfe2f7bf29a62938e
**Solution:**\
To solve this challenge you need to calculate the p and q parameters for the RSA key.\
To do this you need to decompose the N value in prime factor. For this, the following website is great: [Prime Factor Calculator](https://www.dcode.fr/decomposition-nombres-premiers#:~:text=Qu%27est%20ce%20que%20la,un%20produit%20de%20nombres%20premiers)\
After having calculated the 2 parameters (*p: 5665192965464669089 and q: 8850847341676960237*), you can go to the following website to calculate the RSA key: [RSA Calculator](https://www.dcode.fr/rsa-cipher)\
Once on this website, you can enter the informations in the right places and the FLAG will be calculated automatically.
🚩 FLAG
```
DVC{f4c70rDB}
```
---
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