| Date | User | Challenge | Score |
| pilrymage | Factoring | 15 | |
| pilrymage | RSA Signatures | 25 | |
| wizco | Modular Arithmetic 1 | 20 | |
| pilrymage | RSA Decryption | 20 | |
| pilrymage | Private Keys | 20 | |
| pilrymage | Euler's Totient | 20 | |
| parvesh | You either know, XOR you don't | 30 | |
| pilrymage | Public Keys | 15 | |
| SypherZ | Modular Square Root | 35 | |
| tourqui | Encoding Challenge | 40 | |
| pilrymage | Modular Exponentiation | 10 | |
| Jinx | Let's Decrypt Again | 175 | |
| ronnyl | CERTainly not | 30 | |
| patawee | XOR Starter | 10 | |
| Jinx | Fast Primes | 75 | |
| Joe20 | Finding Flags | 2 | |
| 1_canhack | Favourite byte | 20 | |
| patawee | Bytes and Big Integers | 10 | |
| ronnyl | Privacy-Enhanced Mail? | 25 | |
| Jinx | Beatboxer | 150 | |
| 4Better | Great Snakes | 3 | |
| wizco | Extended GCD | 20 | |
| litgift | Hex | 5 | |
| ykm | You either know, XOR you don't | 30 | |
| lukesc | Keyed Permutations | 5 | |
| 4Better | Finding Flags | 2 | |
| LunarPeng | Greatest Common Divisor | 15 | |
| 19030623652 | ASCII | 5 | |
| ykm | Favourite byte | 20 | |
| lcalvie | Ron was Wrong, Whit is Right | 90 | |
| ykm | XOR Properties | 15 | |
| grousey | Modular Arithmetic 2 | 20 | |
| 19030623652 | Great Snakes | 3 | |
| quangntenemy | Exceptional Curves | 100 | |
| hyperegg | Greatest Common Divisor | 15 | |
| ykm | XOR Starter | 10 | |
| ioi_ico | Symmetry | 50 | |
| grousey | Modular Arithmetic 1 | 20 | |
| litgift | ASCII | 5 | |
| ykm | Bytes and Big Integers | 10 | |
| chk1414 | XOR Starter | 10 | |
| chk1414 | Bytes and Big Integers | 10 | |
| ykm | Hex | 5 | |
| chk1414 | Base64 | 10 | |
| 4r3s | Greatest Common Divisor | 15 | |
| chk1414 | Hex | 5 | |
| 19030623652 | Finding Flags | 2 | |
| 4r3s | You either know, XOR you don't | 30 | |
| toniokan | Base64 | 10 | |
| chk1414 | ASCII | 5 |
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