| Date | User | Challenge | Score |
| Redin | Modular Inverting | 25 | |
| Rodel | Manyprime | 40 | |
| Tabbang | Manyprime | 40 | |
| Tabbang | Monoprime | 30 | |
| Tabbang | Factoring | 15 | |
| Tabbang | RSA Signatures | 25 | |
| Rodel | Monoprime | 30 | |
| wapoy64924 | Salty | 20 | |
| NailSabirov | Hex | 5 | |
| Rodel | Factoring | 15 | |
| MocanuRobert | Great Snakes | 3 | |
| Tabbang | RSA Decryption | 20 | |
| MocanuRobert | Finding Flags | 2 | |
| Tabbang | Private Keys | 20 | |
| Tabbang | Euler's Totient | 20 | |
| Tabbang | Public Keys | 15 | |
| Ah_Crypto2 | Modular Inverting | 25 | |
| Ah_Crypto2 | Modular Arithmetic 2 | 20 | |
| Tabbang | Modular Exponentiation | 10 | |
| Ah_Crypto2 | Modular Arithmetic 1 | 20 | |
| Ah_Crypto2 | Extended GCD | 20 | |
| Tabbang | Bean Counter | 60 | |
| Tabbang | Symmetry | 50 | |
| Shrish_Jayanthan | Resisting Bruteforce | 10 | |
| Tabbang | Flipping Cookie | 60 | |
| Ah_Crypto2 | Greatest Common Divisor | 15 | |
| Tabbang | ECB CBC WTF | 55 | |
| Tabbang | ECB Oracle | 60 | |
| Tabbang | Passwords as Keys | 50 | |
| codestern | Modular Inverting | 25 | |
| Tabbang | Modes of Operation Starter | 15 | |
| Shrish_Jayanthan | Keyed Permutations | 5 | |
| Tabbang | Bringing It All Together | 50 | |
| Tabbang | Diffusion through Permutation | 30 | |
| alchemist7 | Chinese Remainder Theorem | 40 | |
| Tabbang | Confusion through Substitution | 25 | |
| Tabbang | Round Keys | 20 | |
| Tabbang | Structure of AES | 15 | |
| Tabbang | Resisting Bruteforce | 10 | |
| Talace | Private Keys | 20 | |
| Tabbang | Keyed Permutations | 5 | |
| Tabbang | Modular Binomials | 80 | |
| Tabbang | Adrien's Signs | 80 | |
| bownight022 | Base64 | 10 | |
| Tabbang | Legendre Symbol | 35 | |
| neinei00 | MDFlag | 125 | |
| ghovhann | Smooth Criminal | 60 | |
| chinatsu | You either know, XOR you don't | 30 | |
| LittleHacker | Round Keys | 20 | |
| Gerson1423 | Great Snakes | 3 |
You are now level Current level