Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 719th TechNolaByte 877 61 10ms 6 Jul 2022 719th Heathcorp 🇦🇺 877 61 11ms 17 Jul 2022 719th C0de5mith 🇺🇸 877 61 12ms 3 Aug 2022 719th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 719th moikaturns 🇬🇧 877 61 11ms 25 Sep 2022 719th FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 719th Mazn3k 877 61 10ms 1 Feb 2023 719th tvcv901 877 61 10ms 22 Mar 2023 719th unfinishedprogram 877 61 10ms 19 Jul 2023 719th snoozingnewt 🇨🇦 877 61 11ms 23 Sep 2023 719th funnyboy-roks 877 61 10ms 9 May 2024 719th bac0id 877 61 11ms 29 Jun 2024 719th madex 🇩🇪 877 61 11ms 9 Jul 2024 719th FortuiteMan 🇫🇷 877 61 10ms 10 Oct 2024 719th RobertHoeh 877 61 10ms 5 Apr 2025 719th LvLError 877 61 10ms 29 May 2025 719th miles-evan 877 61 11ms 5 Aug 2025 719th alexsave 877 61 11ms 13 Oct 2025 739th nwellnhof 🇩🇪 876 53 6ms 4 May 2022 739th GrayJoKing 🇦🇺 876 53 7ms 6 May 2022 741st GolfingSuccess 🇬🇷 876 57 1,160ms 29 Aug 2025 742nd c0d3-4-F00d 🇩🇪 876 89 368ms 5 May 2022 742nd fkantelberg 876 89 407ms 15 Jul 2023 742nd TRexOnGit 876 89 432ms 16 Feb 2024 745th MeWhenI 🇻🇦 876 110 270ms 9 Feb 2023 745th edsrzf 🇳🇿 876 110 294ms 28 Nov 2024 745th targrik 876 110 281ms 30 Jun 2025 748th AlephSquirrel 875 80 12ms 20 Apr 2023 748th ashtraypettingzoo 🇺🇸 875 80 15ms 1 Apr 2024 750th inventshah 875 97 57ms 6 May 2022 750th roupiq 🇵🇱 875 97 55ms 22 Nov 2023 750th emgordon154 875 97 54ms 43 hours ago 753rd DialFrost 🇸🇬 874 69 88ms 15 Jul 2024 754th Irratix 🇳🇱 874 72 2ms 4 May 2022 754th m-tkach 🇺🇦 874 72 2ms 4 May 2022 754th jared-hughes 874 72 2ms 6 Jul 2022 754th michael-pruglo 🇺🇦 874 72 2ms 13 Jul 2022 754th Steffan153 🇫🇮 874 72 2ms 3 Jan 2023 754th MeWhenI 🇻🇦 874 72 3ms 7 May 2023 754th ListeriaM 874 72 2ms 22 Aug 2023 754th JohandeRuiter 🇳🇱 874 72 3ms 14 Sep 2024 754th larcherMTT 874 72 2ms 5 Oct 2024 754th snyderek 🇺🇸 874 72 3ms 19 Feb 2025 754th 5quiwyrm 874 72 2ms 29 Jun 2025 754th TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 754th xiaoyiming123 874 72 2ms 12 Jul 2025 767th Steffan153 🇫🇮 874 83 510ms 9 Apr 2023 768th ovs-code 🇩🇪 874 85 16ms 11 Dec 2023 769th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 770th ovs-code 🇩🇪 873 83 54ms 1 Jul 2024 771st Andriamanitra 🇫🇮 872 54 41ms 21 Jul 2022 771st jared-hughes 872 54 37ms 12 Sep 2022 771st OhmNomNom 872 54 37ms 7 Oct 2022 771st olleicua 🇺🇸 872 54 41ms 21 Jan 2024 771st LostSyntax21 🇬🇧 872 54 42ms 12 Mar 2025 771st AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 771st vishal-mohanty 872 54 40ms 25 Aug 2025 778th Shanethegamer 🇺🇸 872 85 38ms 15 May 2023 778th albanian-laundromat 872 85 40ms 25 Aug 2025 780th dieggsy 872 97 28ms 8 Oct 2024 781st ulucs 871 35 9ms 8 May 2022 781st bstrat 871 35 9ms 6 Jun 2024 781st wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 784th scpchicken 🇵🇼 871 45 332ms 4 May 2022 784th SirBogman 🇺🇸 871 45 230ms 5 May 2022 786th TFeld00 🇩🇰 871 71 25ms 17 May 2022 786th DialFrost 🇸🇬 871 71 32ms 15 Nov 2022 786th StefanHabel 🇨🇦 871 71 21ms 29 Nov 2022 786th nstearns96 🇬🇧 871 71 24ms 11 Jan 2023 786th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 786th anter69 🇭🇺 871 71 18ms 21 May 2024 786th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 786th lelbal 871 71 20ms 26 Aug 2025 786th HETHAT 🇩🇿 871 71 25ms 23 Sep 2025 786th 09cf 871 71 19ms 18 Nov 2025 786th blaztoma 🇱🇹 871 71 24ms 25 Nov 2025 786th Languag3 871 71 25ms 5 Dec 2025 786th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 799th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 800th emgordon154 870 160 1,606ms 24 Dec 2025 First Prev 721–800 of 3,572 Next Last