| Date | User | Challenge | Score |
| Hackerchen | You either know, XOR you don't | 30 | |
| joja | RSA Decryption | 20 | |
| joja | Private Keys | 20 | |
| mahu | Pad Thai | 80 | |
| joja | Euler's Totient | 20 | |
| joja | Public Keys | 15 | |
| joja | Modular Exponentiation | 10 | |
| Meepcom | Quadratic Residues | 25 | |
| Lafayette30 | Manyprime | 40 | |
| Lafayette30 | Square Eyes | 35 | |
| Lafayette30 | Monoprime | 30 | |
| Meepcom | Modular Inverting | 25 | |
| Lafayette30 | Inferius Prime | 30 | |
| Meepcom | Modular Arithmetic 2 | 20 | |
| Lafayette30 | Factoring | 15 | |
| Meepcom | Modular Arithmetic 1 | 20 | |
| Meepcom | Extended GCD | 20 | |
| Hackerchen | Favourite byte | 20 | |
| Meepcom | Greatest Common Divisor | 15 | |
| fluo73 | Marin's Secrets | 50 | |
| Hackerchen | XOR Properties | 15 | |
| Meepcom | Network Attacks | 5 | |
| vivisect0r | You either know, XOR you don't | 30 | |
| Hackerchen | XOR Starter | 10 | |
| Thu_Huong11 | Base64 | 10 | |
| Hackerchen | Bytes and Big Integers | 10 | |
| Meepcom | You either know, XOR you don't | 30 | |
| fluo73 | Infinite Descent | 50 | |
| Thu_Huong11 | Hex | 5 | |
| Hackerchen | Base64 | 10 | |
| anthack1 | Favourite byte | 20 | |
| Zvarethos007 | Computing Public Values | 25 | |
| Xukia | Greatest Common Divisor | 15 | |
| anthack1 | XOR Properties | 15 | |
| Hackerchen | Hex | 5 | |
| scubanac | Bytes and Big Integers | 10 | |
| vivisect0r | Favourite byte | 20 | |
| Hackerchen | ASCII | 5 | |
| ChinoCribioli | Sharks on the Wire | 10 | |
| Hackerchen | Great Snakes | 3 | |
| Thu_Huong11 | ASCII | 5 | |
| scubanac | Base64 | 10 | |
| Zvarethos007 | Generators of Groups | 20 | |
| scubanac | Hex | 5 | |
| Hackerchen | Finding Flags | 2 | |
| ks2n | Encoding Challenge | 40 | |
| ChinoCribioli | Secure Protocols | 5 | |
| shamandeer | XOR Starter | 10 | |
| vivisect0r | XOR Properties | 15 | |
| allowu | Modular Arithmetic 2 | 20 |
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