| Date | User | Challenge | Score |
| bobiealice | Infinite Descent | 50 | |
| JackXas | Confusion through Substitution | 25 | |
| jowj | Hex | 5 | |
| codemutt | Modular Arithmetic 1 | 20 | |
| codemutt | Extended GCD | 20 | |
| JackXas | Round Keys | 20 | |
| bobiealice | Endless Emails | 150 | |
| Art1shok | XOR Starter | 10 | |
| codemutt | Greatest Common Divisor | 15 | |
| cyy968144 | XOR Starter | 10 | |
| codemutt | You either know, XOR you don't | 30 | |
| JashTheGOAT | ASCII | 5 | |
| petr | Quadratic Residues | 25 | |
| agentjlrmt | Transparency | 50 | |
| JashTheGOAT | Great Snakes | 3 | |
| INWDoigoon | Great Snakes | 3 | |
| INWDoigoon | Finding Flags | 2 | |
| JashTheGOAT | Finding Flags | 2 | |
| CYDF1121 | Broken RSA | 100 | |
| codemutt | Favourite byte | 20 | |
| VanQuyem | No Way JOSE | 20 | |
| cyy968144 | Bytes and Big Integers | 10 | |
| codemutt | XOR Properties | 15 | |
| peachcha | Hex | 5 | |
| peachcha | ASCII | 5 | |
| lapa | Modular Binomials | 80 | |
| cyy968144 | Base64 | 10 | |
| hanahiennguyen | Moving Problems | 150 | |
| JackXas | Structure of AES | 15 | |
| JackXas | Resisting Bruteforce | 10 | |
| SGT0v0 | Modular Arithmetic 2 | 20 | |
| JackXas | Keyed Permutations | 5 | |
| agentjlrmt | SSH Keys | 35 | |
| peachcha | Great Snakes | 3 | |
| vdam | Point Negation | 10 | |
| peachcha | Finding Flags | 2 | |
| JACKURUVI99 | Quadratic Residues | 25 | |
| JACKURUVI99 | Modular Inverting | 25 | |
| JACKURUVI99 | Modular Arithmetic 2 | 20 | |
| babylion | ASCII | 5 | |
| peachcha | Public Keys | 15 | |
| kareem_abousheta | XOR Starter | 10 | |
| octopous_prime9 | ASCII | 5 | |
| agentjlrmt | CERTainly not | 30 | |
| octopous_prime9 | Great Snakes | 3 | |
| babylion | Great Snakes | 3 | |
| octopous_prime9 | Finding Flags | 2 | |
| agentjlrmt | Encoding Challenge | 40 | |
| babylion | Finding Flags | 2 | |
| peachcha | Modular Exponentiation | 10 |
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