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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 632nd dokutan 885 96 60ms 8 Feb 2026 642nd emgordon154 885 97 117ms 3 Dec 2025 643rd sean-niemann 🇺🇸 885 109 335ms 25 May 2024 643rd GolfingSuccess 🇬🇷 885 109 340ms 6 Sep 2025 643rd edsrzf 🇳🇿 885 109 330ms 14 days ago 646th MichalMarsalek 🇨🇿 884 70 22ms 5 May 2022 646th primo-ppcg 🇹🇭 884 70 26ms 5 May 2022 646th SirBogman 🇺🇸 884 70 23ms 5 May 2022 646th prplz 🇦🇺 884 70 20ms 5 May 2022 646th Irratix 🇳🇱 884 70 18ms 7 May 2022 646th rak1507 🇬🇧 884 70 20ms 7 May 2022 646th inventshah 884 70 17ms 9 May 2022 646th k3w1k0d3r 884 70 19ms 22 Jun 2022 646th ZakkkkAttackkkk 🇵🇭 884 70 19ms 14 Jul 2022 646th Bonjour27891 🇻🇳 884 70 20ms 14 Jul 2022 646th OllieBoyne 🇬🇧 884 70 21ms 19 Jul 2022 646th wen1now 884 70 21ms 8 Aug 2022 646th 051 🇸🇬 884 70 20ms 8 Aug 2022 646th Sp3000 🇦🇺 884 70 22ms 8 Aug 2022 646th betaveros 884 70 19ms 9 Aug 2022 646th shelerr 884 70 19ms 9 Sep 2022 646th stewSquared 🇺🇸 884 70 23ms 27 Sep 2022 646th orthoplex 🇨🇽 884 70 24ms 9 Oct 2022 646th 5quiwyrm 884 70 21ms 19 Oct 2022 646th myfatemi04 884 70 20ms 4 Nov 2022 646th kevinmchung 884 70 19ms 4 Nov 2022 646th FlorianCassayre 🇫🇷 884 70 19ms 7 Nov 2022 646th fourth-bit 884 70 19ms 29 Nov 2022 646th QuincyNash 🇺🇸 884 70 19ms 29 Nov 2022 646th aksyristos 884 70 20ms 25 Dec 2022 646th thizanne 884 70 20ms 27 Dec 2022 646th Alex-x90 🇺🇸 884 70 20ms 20 Jan 2023 646th bob-th 884 70 19ms 24 Jan 2023 646th SirFireball3521 884 70 18ms 25 Jan 2023 646th stefangimmillaro 884 70 22ms 6 Feb 2023 646th FieryIceStickie 884 70 20ms 3 Apr 2023 646th MeWhenI 🇻🇦 884 70 19ms 30 Apr 2023 646th fgrosshans 🇫🇷 884 70 19ms 5 May 2023 646th Shanethegamer 🇺🇸 884 70 20ms 25 May 2023 646th InigoK 🇺🇸 884 70 21ms 14 Jun 2023 646th quimey 884 70 16ms 15 Jun 2023 646th CornerMercury 🇬🇧 884 70 21ms 19 Jun 2023 646th ndren 884 70 21ms 2 Aug 2023 646th janbehrens 🇩🇪 884 70 21ms 24 Nov 2023 646th namelessiw 884 70 19ms 9 Jan 2024 646th mathisfun271 884 70 20ms 13 Feb 2024 646th Just4FunCoder 884 70 20ms 17 Feb 2024 646th ThijsLuttikhuis 884 70 22ms 3 Mar 2024 646th elgan65536 🇺🇸 884 70 20ms 5 Mar 2024 646th jtaxen 884 70 23ms 1 Apr 2024 646th HumanoidCPU 884 70 21ms 6 May 2024 646th abc7-12 884 70 20ms 6 May 2024 646th ahmetdemirag 🇨🇾 884 70 19ms 9 Jun 2024 646th FranklinJiaChen 884 70 20ms 4 Jul 2024 646th 5cw 🇺🇸 884 70 20ms 13 Jul 2024 646th emgordon154 884 70 25ms 5 Aug 2024 646th dokutan 884 70 19ms 9 Aug 2024 646th jatloe 884 70 18ms 26 Aug 2024 646th lgrandco 884 70 21ms 9 Oct 2024 646th snydej 884 70 21ms 21 Nov 2024 646th erikji 884 70 21ms 4 Feb 2025 646th CutSandstone 884 70 19ms 4 Feb 2025 646th albanian-laundromat 🇺🇸 884 70 21ms 12 Apr 2025 646th xsot 🇸🇬 884 70 23ms 3 May 2025 646th fuzzylojik-golf 🇺🇸 884 70 21ms 14 Jun 2025 646th smilesformiles3 884 70 22ms 14 Jun 2025 646th KasperKivimaeki 🇫🇮 884 70 20ms 30 Jun 2025 646th adaGrad1 884 70 20ms 10 Aug 2025 646th EthanJantz 884 70 21ms 10 Aug 2025 646th qpwoeirut 884 70 16ms 10 Aug 2025 646th katss2 884 70 19ms 17 Aug 2025 646th intgrah 884 70 21ms 23 Sep 2025 646th ryyyn 🇺🇸 884 70 23ms 29 Oct 2025 646th luuumine 🇫🇷 884 70 20ms 3 Nov 2025 646th Babafaba 884 70 19ms 7 Nov 2025 646th commandz0 🇺🇸 884 70 20ms 16 Nov 2025 646th hellopir2 884 70 20ms 23 Nov 2025 646th bzijlema 🇳🇱 884 70 21ms 3 Dec 2025 646th blaztoma 🇱🇹 884 70 23ms 16 Feb 2026 646th firegene 🇮🇪 884 70 20ms 25 Feb 2026 First Prev 641–720 of 3,790 Next Last