Is blockchain based on prime numbers?

Could you clarify for me if blockchain technology actually relies on prime numbers as a fundamental building block? I've heard rumors about this, but I'm not entirely sure how it fits into the overall structure and functionality of the blockchain. Could you explain the role of prime numbers, if any, in the design and operation of blockchain systems? Is it a crucial element, or just a minor component? And if it's significant, how does it contribute to the security and efficiency of blockchain-based transactions? I'm really curious to understand this aspect of blockchain technology better.