| Date | User | Challenge | Score |
| F25 | Modulus Inutilis | 50 | |
| john_doe | Deriving Symmetric Keys | 40 | |
| F25 | Salty | 20 | |
| durga24 | XOR Starter | 10 | |
| F25 | Manyprime | 40 | |
| ERR_X404 | Hex | 5 | |
| F25 | Square Eyes | 35 | |
| F25 | Monoprime | 30 | |
| jablonskim | Resisting Bruteforce | 10 | |
| Theodo | Size and Basis | 15 | |
| yuyuchi | Euler's Totient | 20 | |
| F25 | Inferius Prime | 30 | |
| Theodo | Vectors | 10 | |
| yuyuchi | Public Keys | 15 | |
| jablonskim | Keyed Permutations | 5 | |
| Sc4rl3t | Modular Arithmetic 2 | 20 | |
| F25 | Factoring | 15 | |
| Magnivul | Base64 | 10 | |
| rush_i | Infinite Descent | 50 | |
| mypalpal | MD0 | 80 | |
| Magnivul | Hex | 5 | |
| yuyuchi | Modular Exponentiation | 10 | |
| Magnivul | ASCII | 5 | |
| Magnivul | Great Snakes | 3 | |
| john_doe | Computing Shared Secrets | 30 | |
| ERR_X404 | ASCII | 5 | |
| AjBanao | Modular Binomials | 80 | |
| ERR_X404 | Great Snakes | 3 | |
| durga24 | Bytes and Big Integers | 10 | |
| durga24 | Base64 | 10 | |
| yuyuchi | Bean Counter | 60 | |
| Mihafil746 | CTRIME | 70 | |
| john_doe | Computing Public Values | 25 | |
| ERR_X404 | Finding Flags | 2 | |
| 25520158 | Encoding Challenge | 40 | |
| gzmus | Gaussian Reduction | 50 | |
| F25 | No Leaks | 100 | |
| namaorantauga | XOR Starter | 10 | |
| gzmus | What's a Lattice? | 40 | |
| yuyuchi | Symmetry | 50 | |
| thebixbite | Finding Flags | 2 | |
| Sc4rl3t | Modular Arithmetic 1 | 20 | |
| 25520158 | Bytes and Big Integers | 10 | |
| wapoy64924 | RSA or HMAC? Part 2 | 100 | |
| durga24 | Hex | 5 | |
| Sc4rl3t | Extended GCD | 20 | |
| durga24 | ASCII | 5 | |
| namaorantauga | Bytes and Big Integers | 10 | |
| gzmus | Gram Schmidt | 30 | |
| 25520158 | Base64 | 10 |
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