Frontier Era

The earliest attempt to deploy a smart contract on Ethereum mainnet.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

A raw bytecode test deployment by Linagee on Frontier Day 1 - the classic 0xdeadbeef pattern.

A raw bytecode test deployment by Linagee on Frontier Day 1 - the classic 0xdeadbeef pattern.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

One of six zombie accounts — the earliest known null deployments on Ethereum mainnet, predating the first successful contract deployment at block 48,643.

A raw bytecode test deployment by Linagee on Frontier Day 1 - the classic 0xdeadbeef pattern.

The earliest known Ethereum contract with executable runtime code. A single function go() that returns the string "eth", compiled with the first publicly availa

An early Ethereum contract that returns the string “Hello World!” when called.

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

One of the earliest smart contracts on Ethereum, deployed August 7, 2015 (block 48,790). A pure function that finds the smallest prime factor of any number.

PrimeChecker contract. Identical bytecode to 0x66d796e7 -- smallestfactor(uint256) returns the smallest prime factor, or n if prime. Deployed Aug 7, 2015 by the

PrimeChecker contract. Identical bytecode to 0x66d796e7 -- smallestfactor(uint256) returns the smallest prime factor, or n if prime. Deployed Aug 7, 2015 by the

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

One of six HelloWorld Greeter deployments by Linagee on Ethereum Frontier Day 1 - same source, same compiler, greeting: 'Hello World!'

A failed Greeter deployment, the first of three attempts where the gas limit was too low to store the runtime code on-chain.

A failed Greeter deployment, the second of three attempts where the gas limit was too low to store the runtime code on-chain.

A failed Greeter deployment, the third of three attempts where the gas limit was too low to store the runtime code on-chain.

The Frontier Greeter - Ethereum's Hello World tutorial deployed by a 2000 ETH genesis wallet on Day 1, with mortal() exposed as a callable function.