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 636th rak1507 🇬🇧 884 70 20ms 7 May 2022 636th inventshah 884 70 18ms 9 May 2022 636th k3w1k0d3r 884 70 20ms 22 Jun 2022 636th ZakkkkAttackkkk 🇵🇭 884 70 18ms 14 Jul 2022 636th Bonjour27891 🇻🇳 884 70 20ms 14 Jul 2022 636th OllieBoyne 🇬🇧 884 70 20ms 19 Jul 2022 636th wen1now 884 70 20ms 8 Aug 2022 636th 051 🇸🇬 884 70 19ms 8 Aug 2022 636th Sp3000 🇦🇺 884 70 21ms 8 Aug 2022 636th betaveros 884 70 19ms 9 Aug 2022 636th shelerr 884 70 20ms 9 Sep 2022 636th stewSquared 🇺🇸 884 70 20ms 27 Sep 2022 636th orthoplex 🇨🇽 884 70 24ms 9 Oct 2022 636th 5quiwyrm 884 70 18ms 19 Oct 2022 636th myfatemi04 884 70 20ms 4 Nov 2022 636th kevinmchung 884 70 19ms 4 Nov 2022 636th FlorianCassayre 🇫🇷 884 70 18ms 7 Nov 2022 636th fourth-bit 884 70 19ms 29 Nov 2022 636th QuincyNash 🇺🇸 884 70 20ms 29 Nov 2022 636th aksyristos 884 70 20ms 25 Dec 2022 636th thizanne 884 70 20ms 27 Dec 2022 636th Alex-x90 🇺🇸 884 70 20ms 20 Jan 2023 636th bob-th 884 70 20ms 24 Jan 2023 636th SirFireball3521 884 70 17ms 25 Jan 2023 636th stefangimmillaro 884 70 21ms 6 Feb 2023 636th FieryIceStickie 884 70 18ms 3 Apr 2023 636th MeWhenI 🇻🇦 884 70 19ms 30 Apr 2023 636th fgrosshans 🇫🇷 884 70 18ms 5 May 2023 636th Shanethegamer 🇺🇸 884 70 20ms 25 May 2023 636th InigoK 🇺🇸 884 70 20ms 14 Jun 2023 636th quimey 884 70 16ms 15 Jun 2023 636th CornerMercury 🇬🇧 884 70 20ms 19 Jun 2023 636th ndren 884 70 19ms 2 Aug 2023 636th janbehrens 🇩🇪 884 70 21ms 24 Nov 2023 636th namelessiw 884 70 19ms 9 Jan 2024 636th mathisfun271 884 70 20ms 13 Feb 2024 636th Just4FunCoder 884 70 20ms 17 Feb 2024 636th ThijsLuttikhuis 884 70 20ms 3 Mar 2024 636th elgan65536 🇺🇸 884 70 19ms 5 Mar 2024 636th jtaxen 884 70 19ms 1 Apr 2024 636th HumanoidCPU 884 70 19ms 6 May 2024 636th abc7-12 884 70 22ms 6 May 2024 636th ahmetdemirag 🇨🇾 884 70 20ms 9 Jun 2024 636th FranklinJiaChen 884 70 18ms 4 Jul 2024 636th 5cw 🇺🇸 884 70 21ms 13 Jul 2024 636th CaedenHarper 🇨🇦 884 70 21ms 3 Aug 2024 636th emgordon154 884 70 20ms 5 Aug 2024 636th dokutan 884 70 19ms 9 Aug 2024 636th jatloe 884 70 20ms 26 Aug 2024 636th lgrandco 884 70 18ms 9 Oct 2024 636th snydej 884 70 20ms 21 Nov 2024 636th erikji 884 70 20ms 4 Feb 2025 636th CutSandstone 884 70 20ms 4 Feb 2025 636th albanian-laundromat 884 70 18ms 12 Apr 2025 636th xsot 🇸🇬 884 70 23ms 3 May 2025 636th fuzzylojik-golf 🇺🇸 884 70 19ms 14 Jun 2025 636th smilesformiles3 884 70 21ms 14 Jun 2025 636th KasperKivimaeki 🇫🇮 884 70 20ms 30 Jun 2025 636th adaGrad1 884 70 19ms 10 Aug 2025 636th EthanJantz 884 70 19ms 10 Aug 2025 636th qpwoeirut 884 70 16ms 10 Aug 2025 636th katss2 884 70 19ms 17 Aug 2025 636th intgrah 884 70 20ms 23 Sep 2025 636th ryyyn 🇺🇸 884 70 19ms 29 Oct 2025 636th luuumine 🇫🇷 884 70 19ms 3 Nov 2025 636th Babafaba 884 70 20ms 7 Nov 2025 636th commandz0 🇺🇸 884 70 19ms 16 Nov 2025 636th hellopir2 884 70 22ms 23 Nov 2025 636th bzijlema 🇳🇱 884 70 20ms 3 Dec 2025 636th blaztoma 🇱🇹 884 70 21ms 16 Feb 2026 636th firegene 🇮🇪 884 70 19ms 25 Feb 2026 636th Googolplexo 🇷🇺 884 70 19ms 11 days ago 636th jusaka 884 70 19ms 3 days ago 714th Steffan153 🇫🇮 884 75 2,579ms 41 hours ago 715th sean-niemann 🇺🇸 884 109 278ms 25 May 2024 715th GolfingSuccess 🇬🇷 884 109 289ms 6 Sep 2025 717th Shanethegamer 🇺🇸 883 51 472ms 15 May 2023 718th GrayJoKing 🇦🇺 883 84 35ms 19 Jun 2022 718th primo-ppcg 🇹🇭 883 84 36ms 29 Jun 2022 718th MeWhenI 🇻🇦 883 84 38ms 30 Dec 2025 First Prev 641–720 of 3,665 Next Last