I have been messing around with cryptography (for recreational use) and I have created my own function that encrypts things for me. Now, with that being said, I freely admit that I am by no means an expert on cryptography and I know that rule 101 of cryptography is to not do it yourself. However, I am genuinely interested if my encryption function is secure. So, although I am not entirely sure if this is the right forum to post it on, I wanted to see if anyone can crack my encrypted message (attached below). For those who like a challenge, I think this will be a fun one (and I get to learn all the holes in my encryption logic if someone figures out the message). For those who want to participate in this challenge, simply respond with what you think the decrypted message is and I will verify whether you are correct or not.
Encrypted Message: 37126281017225427352134331913330220051479104178502548903187948952952485342724203650753089