| Date | User | Challenge | Score |
| melvin123_4 | Quadratic Residues | 25 | |
| melvin123_4 | Modular Inverting | 25 | |
| Ag3 | You either know, XOR you don't | 30 | |
| melvin123_4 | Modular Arithmetic 2 | 20 | |
| melvin123_4 | Modular Arithmetic 1 | 20 | |
| melvin123_4 | Extended GCD | 20 | |
| mathical0732 | Symmetry | 50 | |
| melvin123_4 | Greatest Common Divisor | 15 | |
| Rakshana | Favourite byte | 20 | |
| R125A14 | Great Snakes | 3 | |
| mauust | Factoring | 15 | |
| mauust | RSA Signatures | 25 | |
| LewisHamstring | Confusion through Substitution | 25 | |
| sheperd22 | ASCII | 5 | |
| mauust | RSA Decryption | 20 | |
| R125A14 | Finding Flags | 2 | |
| sheperd22 | Great Snakes | 3 | |
| sheperd22 | Finding Flags | 2 | |
| lucky123 | Adrien's Signs | 80 | |
| trypc | Modes of Operation Starter | 15 | |
| erickao | Favourite byte | 20 | |
| noobboymk | Privacy-Enhanced Mail? | 25 | |
| Kahfi30134 | Favourite byte | 20 | |
| Kahfi30134 | Bytes and Big Integers | 10 | |
| yousefeldeeb | Base64 | 10 | |
| janolav | Favourite byte | 20 | |
| mauust | Private Keys | 20 | |
| mauust | Euler's Totient | 20 | |
| Angoletto23 | Computing Shared Secrets | 30 | |
| Angoletto23 | Modulus Inutilis | 50 | |
| trypc | Bringing It All Together | 50 | |
| Angoletto23 | Salty | 20 | |
| raxise | Resisting Bruteforce | 10 | |
| kckckck3679 | Resisting Bruteforce | 10 | |
| Sefaself | Monoprime | 30 | |
| LewisHamstring | Round Keys | 20 | |
| raxise | Keyed Permutations | 5 | |
| Sefaself | Factoring | 15 | |
| Sefaself | RSA Signatures | 25 | |
| Rectus | Computing Shared Secrets | 30 | |
| Rakshana | XOR Properties | 15 | |
| Rectus | Computing Public Values | 25 | |
| yevhenii | Modular Binomials | 80 | |
| Rectus | Generators of Groups | 20 | |
| yevhenii | Adrien's Signs | 80 | |
| yevhenii | Chinese Remainder Theorem | 40 | |
| Abhinav_Manoj | Confusion through Substitution | 25 | |
| yevhenii | Modular Square Root | 35 | |
| yevhenii | Legendre Symbol | 35 | |
| yevhenii | Quadratic Residues | 25 |
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