Cryptography challenge cracked by factoring weak RSA modulus

A cryptography challenge on the picoGym platform involved cracking an RSA encryption system. The challenge provided a small, deliberately weak RSA modulus along with public exponent and ciphertext. By factoring the modulus using Python's sympy library, participants could derive the two prime factors. This allowed reconstruction of the private key needed to decrypt the ciphertext and retrieve the hidden flag. The exercise demonstrated how improperly sized cryptographic parameters compromise security.