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 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 Multitap Input 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 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 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 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 Multitap Input 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 561st primo-ppcg 🇹🇭 888 85 39ms 14 Jan 2025 561st MeWhenI 🇻🇦 888 85 41ms 21 Apr 2025 563rd ovs-code 🇩🇪 887 73 340ms 22 Jul 2023 564th janbehrens 🇩🇪 887 90 442ms 21 Apr 2023 564th Yewzir 🇧🇪 887 90 426ms 22 Apr 2023 564th Ripick 887 90 439ms 27 Nov 2024 564th emgordon154 887 90 368ms 10 Dec 2025 568th albanian-laundromat 887 94 415ms 24 Sep 2025 568th jkelly467 887 94 544ms 23 Oct 2025 568th HumanoidCPU 887 94 397ms 8 Nov 2025 571st snoozingnewt 🇨🇦 887 96 107ms 4 Dec 2025 572nd GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 572nd emplv 🇱🇻 886 71 2ms 5 May 2022 572nd JayXon 🇺🇸 886 71 2ms 7 May 2022 572nd nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 572nd stefangimmillaro 886 71 2ms 2 Jun 2023 572nd 09cf 886 71 7ms 4 Oct 2023 572nd kkoenig 886 71 2ms 21 Dec 2023 572nd sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 572nd masinag 🇮🇹 886 71 2ms 6 Oct 2024 581st m-tkach 🇺🇦 886 112 130ms 22 Jun 2025 582nd steffan-polygolf 885 74 136ms 14 Feb 2024 582nd prestosilver 🇺🇸 885 74 124ms 18 Dec 2025 584th SiestaGuru 885 88 411ms 9 Jan 2023 584th rifatx 885 88 390ms 5 Jul 2024 584th kmathis22 885 88 398ms 25 Sep 2025 587th m-tkach 🇺🇦 884 59 402ms 21 Jan 2024 587th GolfingSuccess 🇬🇷 884 59 506ms 20 Jan 2025 587th duckyluuk 🇳🇱 884 59 439ms 4 Dec 2025 590th kg583 🇺🇸 884 84 17ms 30 Jul 2025 590th DialFrost 🇸🇬 884 84 19ms 14 days ago 592nd nipzu 884 94 116ms 17 May 2022 592nd Natanaelel 🇸🇪 884 94 125ms 17 Jun 2022 592nd nkoppel 884 94 120ms 19 Oct 2022 592nd ovs-code 🇩🇪 884 94 118ms 21 Jun 2023 592nd mousetail 🇳🇱 884 94 124ms 12 Jan 2024 597th Irratix 🇳🇱 884 96 57ms 4 May 2022 597th MeWhenI 🇻🇦 884 96 54ms 1 Jun 2022 597th janbehrens 🇩🇪 884 96 57ms 21 Apr 2023 597th Shanethegamer 🇺🇸 884 96 57ms 15 May 2023 597th Yewzir 🇧🇪 884 96 56ms 11 Nov 2023 597th MateuszPietrzak 🇵🇱 884 96 60ms 18 Nov 2023 597th kkoenig 884 96 58ms 21 Dec 2023 597th BlankSpruce 884 96 60ms 20 Aug 2024 597th fuzzylojik-golf 🇺🇸 884 96 60ms 14 Jun 2025 606th sean-niemann 🇺🇸 884 109 274ms 25 May 2024 606th GolfingSuccess 🇬🇷 884 109 273ms 6 Sep 2025 608th MichalMarsalek 🇨🇿 883 70 19ms 5 May 2022 608th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 608th SirBogman 🇺🇸 883 70 19ms 5 May 2022 608th prplz 🇦🇺 883 70 18ms 5 May 2022 608th Irratix 🇳🇱 883 70 18ms 7 May 2022 608th rak1507 🇬🇧 883 70 19ms 7 May 2022 608th inventshah 883 70 17ms 9 May 2022 608th k3w1k0d3r 883 70 18ms 22 Jun 2022 608th ZakkkkAttackkkk 🇵🇭 883 70 17ms 14 Jul 2022 608th Bonjour27891 🇻🇳 883 70 20ms 14 Jul 2022 608th OllieBoyne 🇬🇧 883 70 18ms 19 Jul 2022 608th wen1now 883 70 19ms 8 Aug 2022 608th 051 🇸🇬 883 70 18ms 8 Aug 2022 608th Sp3000 🇦🇺 883 70 19ms 8 Aug 2022 608th betaveros 883 70 19ms 9 Aug 2022 608th shelerr 883 70 18ms 9 Sep 2022 608th stewSquared 🇺🇸 883 70 22ms 27 Sep 2022 608th orthoplex 🇨🇽 883 70 23ms 9 Oct 2022 608th 5quiwyrm 883 70 17ms 19 Oct 2022 608th myfatemi04 883 70 19ms 4 Nov 2022 608th kevinmchung 883 70 18ms 4 Nov 2022 608th FlorianCassayre 🇫🇷 883 70 18ms 7 Nov 2022 608th fourth-bit 883 70 18ms 29 Nov 2022 608th QuincyNash 🇺🇸 883 70 18ms 29 Nov 2022 608th aksyristos 883 70 18ms 25 Dec 2022 608th thizanne 883 70 20ms 27 Dec 2022 608th Alex-x90 🇺🇸 883 70 21ms 20 Jan 2023 608th bob-th 883 70 18ms 24 Jan 2023 608th SirFireball3521 883 70 17ms 25 Jan 2023 608th stefangimmillaro 883 70 19ms 6 Feb 2023 608th FieryIceStickie 883 70 19ms 3 Apr 2023 608th MeWhenI 🇻🇦 883 70 19ms 30 Apr 2023 608th fgrosshans 🇫🇷 883 70 18ms 5 May 2023 First Prev 561–640 of 3,531 Next Last