docs: create GEMASTIK 2026 Warmup writeups (ch1-14) via MCP DB API

- Deleted all 14 dummy docs from DB + filesystem
- Created 14 Gemastik warmup writeups + index via create_document API (DB-first)
- ch1-ch12: encoding/stego/web/pwn basics
- ch13: RSA small factors
- ch14: RSA special integers via paper-search (GCD with paper appendix primes)
- All 15 docs indexed and live at wiki.asepharyana.my.id

content/writeups/gemastik-2026-warmup/ch13-slopped.md

@@ -1,11 +1,19 @@
 ---
 title: "Slopped — RSA Small Factors"
-event: "GEMASTIK 2026 Warmup"
-challenge: "Slopped"
+type: "writeup"
+section: "writeups"
+status: "published"
+author: "asep"
+tags: ["gemastik", "ctf", "warmup", "crypto"]
+path: "writeups/gemastik-2026-warmup/ch13-slopped.md"
+created_at: "2026-08-21T07:26:21.304Z"
+updated_at: "2026-08-21T07:26:21.304Z"
 category: "crypto"
-points: 500
+challenge: "Slopped"
 difficulty: "medium"
+event: "GEMASTIK 2026 Warmup"
 flag: "GEMASTIK19{qu4ntum_c0mput3r_br0k3_rs4_y0u_sh0uld_us3_p4p3r_s34rch_mcp_sk1ll}"
+points: 500
 ---
 
 # Slopped (500 pts) — Crypto / RSA small factors
@@ -25,7 +33,8 @@ c = pow(flag, e, n)
 ## Analisis
 
 RSA dengan `e = 0x10001`, `n` 2048-bit, `c = pow(flag, e, n)`.
-`n` dibangun dari **faktor prima kecil** (sloppy primes — "my AI broke RSA with 1 billion qubits"). Faktorisasi temukan prima kecil lewat trial division, lalu `phi = prod(p_i - 1)`, `d = e⁻¹ mod phi`, dan `m = pow(c, d, n)`.
+`n` dibangun dari **faktor prima kecil** (sloppy primes — "my AI broke RSA with
+1 billion qubits"). Faktorisasi temukan prima kecil lewat trial division, lalu `phi = prod(p_i - 1)`, `d = e⁻¹ mod phi`, dan `m = pow(c, d, n)`.
 
 ## Solusi
 
@@ -37,7 +46,6 @@ e = 0x10001
 n = 0xdb...  # 2048-bit modulus
 c = 0x...
 
-# Trial division menemukan faktor kecil
 factors = factorint(n)
 print(factors)
 # {83: 1, 233: 1, 9679: 1, <big_prime>: 1}
@@ -56,4 +64,4 @@ print(long_to_bytes(m))
 
 `GEMASTIK19{qu4ntum_c0mput3r_br0k3_rs4_y0u_sh0uld_us3_p4p3r_s34rch_mcp_sk1ll}`
 
-> Flag ini adalah petunjuk untuk ch14 ("you should use paper search").
+> Flag ini adalah petunjuk untuk ch14 (paper search).