By what formula is the genesis-hash calculated?

[Many Coins]

Hello!

Tell me please: by what formula is the genesis-hash calculated?

Code:

uint256 hashGenesisBlock("0x12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2");

That is:

Code:

0x12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2

what?

(A+B)*C = 0x12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2? 

I understand that this is a hash from something But from what?

Thank you.

[1715057074]

1715057074

[1715057074]

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[1715057074]

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[1715057074]

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[achow101]

It's the hash of the genesis block. The genesis blocks parameters can be found in chainparams.cpp. It is then serialized and hashed.

[ir.hn]

This:

printf("calc new genesis block\n");
            printf("hashMerkleRoot %s\n", genesis.hashMerkleRoot.ToString().c_str());
            printf("bnProofOfWorkLimit 0x%x\n", bnProofOfWorkLimit.GetCompact());
            printf("genesis.nBits 0x%x\n", genesis.nBits);

            for (genesis.nNonce = 0; ; genesis.nNonce++) {
                hashGenesisBlock = genesis.GetHash();
                if (hashGenesisBlock <= bnProofOfWorkLimit.getuint256()) break;
            }

            printf("hashGenesisBlock %s\n", hashGenesisBlock.ToString().c_str());
            printf("genesis.nNonce %d\n", genesis.nNonce);

[Many Coins]

Thank you. I'll try to figure it out