PUZZLE #4052: PGP RSA Cipher (diff 2)

pgp learn difficulty: 2/7 mixed author: system unsolved

PGP-style RSA encrypted message. Factor the modulus to recover the private key and decrypt.

DATA

Public Key N	`9167`
Public Key E	`65537`
Ciphertext	`14`
Algorithm	`RSA`
Key Size Bits	`14`
Hint	`RSA decryption: factor n into p and q, compute phi, find d via modular inverse, decrypt c to get m. m mod 26 (A=0) gives the answer letter.`
Answer Format	`single lowercase letter (decrypt the RSA ciphertext)`

{
  "public_key_n": 9167,
  "public_key_e": 65537,
  "ciphertext": 14,
  "algorithm": "RSA",
  "key_size_bits": 14,
  "hint": "RSA decryption: factor n into p and q, compute phi, find d via modular inverse, decrypt c to get m. m mod 26 (A=0) gives the answer letter.",
  "answer_format": "single lowercase letter (decrypt the RSA ciphertext)"
}

author's note: Pool fill: pgp diff 2