| Date | User | Challenge | Score |
| TV_2xx6 | Extended GCD | 20 | |
| peridot0x | Monoprime | 30 | |
| TV_2xx6 | Greatest Common Divisor | 15 | |
| senynmaman | Marin's Secrets | 50 | |
| ub_krypto_25_04 | Round Keys | 20 | |
| Evil_Devil247 | RSA Decryption | 20 | |
| senynmaman | Infinite Descent | 50 | |
| c00per | Modular Binomials | 80 | |
| Tr8t0r | Greatest Common Divisor | 15 | |
| c00per | Adrien's Signs | 80 | |
| AslanKaztaev | Generators of Groups | 20 | |
| Dgcg | Modes of Operation Starter | 15 | |
| AslanKaztaev | Working with Fields | 10 | |
| aidananana | Crossed Wires | 100 | |
| c00per | Chinese Remainder Theorem | 40 | |
| shinobukochou | Monoprime | 30 | |
| veggietales | Modular Square Root | 35 | |
| TV_2xx6 | You either know, XOR you don't | 30 | |
| aidananana | Everything is Big | 70 | |
| Hammad_X42 | Great Snakes | 3 | |
| shinobukochou | XOR Properties | 15 | |
| shinobukochou | ASCII | 5 | |
| PatrickL_SC | Couples | 100 | |
| shinobukochou | Great Snakes | 3 | |
| shinobukochou | Finding Flags | 2 | |
| linhkhong | Modular Inverting | 25 | |
| Tr8t0r | You either know, XOR you don't | 30 | |
| linhkhong | Modular Arithmetic 2 | 20 | |
| kavyabansal08 | XOR Starter | 10 | |
| BonziSki | You either know, XOR you don't | 30 | |
| r34770c | Chinese Remainder Theorem | 40 | |
| senynmaman | Everything is Still Big | 100 | |
| c00per | Modular Square Root | 35 | |
| leo_shokh | Modular Inverting | 25 | |
| senynmaman | Crossed Wires | 100 | |
| Tr8t0r | Favourite byte | 20 | |
| leo_shokh | Modular Arithmetic 2 | 20 | |
| senynmaman | Everything is Big | 70 | |
| Tr8t0r | XOR Properties | 15 | |
| senynmaman | Modulus Inutilis | 50 | |
| kavyabansal08 | Bytes and Big Integers | 10 | |
| leo_shokh | Modular Arithmetic 1 | 20 | |
| cat1cat2cat | You either know, XOR you don't | 30 | |
| ub_krypto_25_04 | Structure of AES | 15 | |
| senynmaman | Salty | 20 | |
| BonziSki | Favourite byte | 20 | |
| Tr8t0r | XOR Starter | 10 | |
| kavyabansal08 | Base64 | 10 | |
| kavyabansal08 | Hex | 5 | |
| leo_shokh | Extended GCD | 20 |
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