Pre-launch · mainnet not yet open

Bitcoin 1.01

A currency that keeps Bitcoin's idea, renews its signatures against quantum computers, and runs peer to peer without leaning on any server.

Read the documents Open the labs

Bitcoin 1.01 icon: a white √2 and a yellow ₿ badge on red — The first 1024 bits of √2, in hexadecimal. The first 16 digits equal SHA-512's first initial constant. The chain begins with these bits, and each halving era brings the next 1024 bits into the rules.

§ 01

Technical summary

01Signatures: Every transaction is signed with SLH-DSA-SHAKE-256s. Its security rests only on a hash function; Shor's algorithm, the method a quantum computer would use to break today's signatures, does not apply.; NIST FIPS 205 · 29,792-byte signature · passes every official test vector
02Hash: ORION: Keccak-f[1600], the core of SHA-3, with a 1024-bit capacity. ORION-512 output is identical to standard SHA3-512, so it can be checked with any SHA-3 tool.; block ID 1024 bits · transaction ID 512 bits
03Network: Nodes find each other on the local network, through seed computers, and from addresses they learn from one another. No domain, hosting or central server is needed.; TCP 10102 · UDP 10101 discovery · IPv4 + IPv6
04Money: 120-second blocks, a 10-coin block reward, halving every 1,050,000 blocks (about four years). Difficulty is adjusted every block with the ASERT rule.; total supply 20,999,989.8635 coins
05Swaps: Atomic swaps with Bitcoin over HTLCs: either both sides get paid, or both get their own money back. There is no exchange or custodian in between.; Bitcoin bridge · no intermediary
06Wallet: The wallet stays only on your own computer, encrypted with your password. A single backup restores every address.; Argon2id · ChaCha20-Poly1305
07Science layer: A design that directs half of the mining reward to scientific computation whose results can be verified: drug-candidate screening, materials discovery.; draft

§ 02

A heartbeat in every block

Every block header records how many steps the number (height + 27) takes to reach 1 under the 3x+1 rule. It plays no part in security; it is the chain's signature. At genesis the number is 27: it reaches 1 in 111 steps, climbing as high as 9,232 on the way.

27 → 1111 stepspeak 9,232 (step 77)

§ 03

Important

This site is not part of the network

Bitcoin 1.01 does not need this site. The network is made of programs running on participants' own computers, and it keeps running even if bit101.org goes offline. This site only publishes documents, the labs and, after launch, the program's verification hashes.

bit101.org will never ask for your private key, wallet backup or password. Any page or message that does is fake.
It holds no funds, makes no transactions on your behalf, and asks for no account or identity.

§ 04

Where the project stands

1Hash and genesisdone
2Miningdone
3Signatures and walletdone
4Networkdone
5Security and appsdone
5bBitcoin bridgedone
5cHardeningdone
6Encrypted networkplanned
7Messaging and archiveplanned
8Science layerdraft

The mainnet launch date has not been set. When the network opens, the program will be published on the Download page together with its verification hashes.

§ 05

Labs

Interactive pages built for the science layer's first campaigns. Every calculation runs in your browser; nothing is sent anywhere. The labs are currently available in Turkish only.

Compound Lab

Pick elements from the periodic table and see in which ratios they can combine, which thresholds each ratio passes, and the estimated properties of the compound.

Open L2

Nuclear Forces Lab

Change the strong force, the electromagnetic repulsion and the neutron–proton mass difference, and see where nuclei fall apart.

Open