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Bitcoin mining machines are specialized computing devices designed specifically for Bitcoin mining, utilizing Application-Specific Integrated Circuit (ASIC) technology to solve complex mathematical problems that validate transactions and add them to the blockchain in exchange for Bitcoin rewards. These devices have evolved from CPUs, GPUs, and FPGAs to modern ASIC miners, optimized exclusively to perform SHA-256 hash algorithm calculations.

Miners are participants in blockchain networks who validate transactions and add them to the blockchain by solving complex cryptographic puzzles, earning the right to create new blocks and receive rewards, primarily functioning within Proof of Work (PoW) consensus mechanism blockchains.