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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 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 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 532nd shandriy 892 60 17ms 23 Jan 2026 532nd spidunno 892 60 17ms 27 days ago 563rd lynn 892 65 283ms 5 May 2022 563rd GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 563rd Sakisan 🇧🇪 892 65 178ms 6 May 2022 563rd JayXon 🇺🇸 892 65 301ms 17 Oct 2022 563rd Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 563rd tobeannouncd 892 65 302ms 25 Apr 2025 563rd sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 570th stefangimmillaro 892 71 89ms 2 Oct 2022 570th Steffan153 🇫🇮 892 71 97ms 23 Feb 2023 570th Shanethegamer 🇺🇸 892 71 93ms 16 May 2023 570th sean-niemann 🇺🇸 892 71 92ms 12 Jul 2024 574th Lydxn 🇨🇦 892 108 284ms 6 May 2022 574th CaedenHarper 🇨🇦 892 108 299ms 5 Oct 2025 576th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 577th DialFrost 🇸🇬 891 95 29ms 10 Dec 2024 578th canissimia 🇦🇶 891 110 2,640ms 20 Feb 2023 579th jared-hughes 891 130 22ms 15 Dec 2024 580th canissimia 🇦🇶 891 204 16ms 25 Nov 2023 581st primo-ppcg 🇹🇭 890 52 219ms 5 May 2022 581st dvargas46 🇺🇸 890 52 87ms 22 Dec 2022 583rd frankgraziano 890 75 16ms 20 days ago 584th snoozingnewt 🇨🇦 890 96 118ms 4 Dec 2025 584th Steffan153 🇫🇮 890 96 120ms 17 days ago 586th MeWhenI 🇻🇦 889 53 40ms 1 Jun 2022 586th stefangimmillaro 889 53 37ms 2 Oct 2022 586th Haksell 🇦🇶 889 53 42ms 22 Feb 2023 589th mousetail 🇳🇱 888 41 66ms 29 Aug 2025 590th primo-ppcg 🇹🇭 888 85 39ms 14 Jan 2025 590th MeWhenI 🇻🇦 888 85 41ms 21 Apr 2025 592nd m-tkach 🇺🇦 888 112 119ms 22 Jun 2025 593rd ovs-code 🇩🇪 887 73 340ms 22 Jul 2023 594th frosster 🇨🇦 887 77 5ms 8 Feb 2026 595th janbehrens 🇩🇪 887 90 467ms 21 Apr 2023 595th Yewzir 🇧🇪 887 90 459ms 22 Apr 2023 595th Ripick 887 90 459ms 27 Nov 2024 595th emgordon154 887 90 476ms 10 Dec 2025 599th albanian-laundromat 887 94 486ms 24 Sep 2025 599th jkelly467 887 94 401ms 23 Oct 2025 599th HumanoidCPU 887 94 479ms 8 Nov 2025 602nd GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 602nd emplv 🇱🇻 886 71 2ms 5 May 2022 602nd JayXon 🇺🇸 886 71 2ms 7 May 2022 602nd nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 602nd stefangimmillaro 886 71 2ms 2 Jun 2023 602nd 09cf 886 71 7ms 4 Oct 2023 602nd kkoenig 886 71 2ms 21 Dec 2023 602nd sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 602nd masinag 🇮🇹 886 71 2ms 6 Oct 2024 611th SiestaGuru 886 88 374ms 9 Jan 2023 611th rifatx 886 88 398ms 5 Jul 2024 611th kmathis22 886 88 371ms 25 Sep 2025 614th steffan-polygolf 885 74 132ms 14 Feb 2024 614th prestosilver 🇺🇸 885 74 123ms 18 Dec 2025 616th nipzu 885 94 128ms 17 May 2022 616th Natanaelel 🇸🇪 885 94 128ms 17 Jun 2022 616th nkoppel 885 94 130ms 19 Oct 2022 616th ovs-code 🇩🇪 885 94 122ms 21 Jun 2023 616th mousetail 🇳🇱 885 94 126ms 12 Jan 2024 621st Irratix 🇳🇱 885 96 62ms 4 May 2022 621st MeWhenI 🇻🇦 885 96 60ms 1 Jun 2022 621st janbehrens 🇩🇪 885 96 64ms 21 Apr 2023 621st Shanethegamer 🇺🇸 885 96 60ms 15 May 2023 621st Yewzir 🇧🇪 885 96 60ms 11 Nov 2023 621st MateuszPietrzak 🇵🇱 885 96 60ms 18 Nov 2023 621st kkoenig 885 96 57ms 21 Dec 2023 621st BlankSpruce 885 96 62ms 20 Aug 2024 621st fuzzylojik-golf 🇺🇸 885 96 61ms 14 Jun 2025 621st dokutan 885 96 64ms 8 Feb 2026 631st m-tkach 🇺🇦 884 59 401ms 21 Jan 2024 631st GolfingSuccess 🇬🇷 884 59 502ms 20 Jan 2025 631st duckyluuk 🇳🇱 884 59 409ms 4 Dec 2025 634th sean-niemann 🇺🇸 884 109 278ms 25 May 2024 634th GolfingSuccess 🇬🇷 884 109 289ms 6 Sep 2025 636th Shanethegamer 🇺🇸 883 51 472ms 15 May 2023 637th MichalMarsalek 🇨🇿 883 70 20ms 5 May 2022 637th primo-ppcg 🇹🇭 883 70 25ms 5 May 2022 637th SirBogman 🇺🇸 883 70 19ms 5 May 2022 637th prplz 🇦🇺 883 70 21ms 5 May 2022 First Prev 561–640 of 3,627 Next Last