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 550th piano-miles 892 60 11ms 16 Jan 2023 550th Yewzir 🇧🇪 892 60 14ms 12 Feb 2023 550th shellbertt 🇨🇦 892 60 15ms 26 Feb 2023 550th zakariamouhid 892 60 12ms 20 May 2023 550th raphaelimahorn 892 60 13ms 23 Aug 2023 550th jbt 892 60 12ms 25 Dec 2023 550th olleicua 🇺🇸 892 60 12ms 15 Feb 2024 550th HumanoidCPU 892 60 13ms 3 May 2024 550th dokutan 892 60 11ms 13 Aug 2024 550th LostSyntax21 🇬🇧 892 60 15ms 10 Sep 2024 550th xyangst 892 60 11ms 28 Sep 2024 550th a6166231 🇨🇳 892 60 11ms 15 May 2025 550th SebassNoob 892 60 11ms 5 Aug 2025 550th levinwinter 892 60 11ms 22 Oct 2025 550th Cube14yt 892 60 11ms 16 Nov 2025 550th gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 550th amazingalek 🇳🇴 892 60 13ms 20 Dec 2025 550th shandriy 892 60 11ms 23 Jan 2026 550th spidunno 892 60 13ms 17 Feb 2026 580th lynn 892 65 267ms 5 May 2022 580th GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 580th Sakisan 🇧🇪 892 65 178ms 6 May 2022 580th JayXon 🇺🇸 892 65 271ms 17 Oct 2022 580th Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 580th tobeannouncd 892 65 302ms 25 Apr 2025 580th sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 587th GrayJoKing 🇦🇺 892 77 76ms 13 Sep 2024 588th DialFrost 🇸🇬 892 95 30ms 10 Dec 2024 589th m-tkach 🇺🇦 892 112 116ms 22 Jun 2025 590th canissimia 🇦🇶 892 204 16ms 25 Nov 2023 591st ovs-code 🇩🇪 890 73 340ms 22 Jul 2023 592nd Shanethegamer 🇺🇸 890 83 1,459ms 4 May 2022 593rd mousetail 🇳🇱 889 41 66ms 29 Aug 2025 594th MeWhenI 🇻🇦 889 53 42ms 1 Jun 2022 594th stefangimmillaro 889 53 44ms 2 Oct 2022 594th Haksell 🇦🇶 889 53 43ms 22 Feb 2023 597th primo-ppcg 🇹🇭 889 85 39ms 14 Jan 2025 597th MeWhenI 🇻🇦 889 85 41ms 21 Apr 2025 599th janbehrens 🇩🇪 888 90 467ms 21 Apr 2023 599th Yewzir 🇧🇪 888 90 459ms 22 Apr 2023 599th Ripick 888 90 459ms 27 Nov 2024 599th emgordon154 888 90 441ms 10 Dec 2025 603rd albanian-laundromat 🇺🇸 888 94 486ms 24 Sep 2025 603rd jkelly467 888 94 401ms 23 Oct 2025 603rd HumanoidCPU 888 94 479ms 8 Nov 2025 606th frosster 🇨🇦 887 77 5ms 8 Feb 2026 607th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 607th emplv 🇱🇻 886 71 2ms 5 May 2022 607th JayXon 🇺🇸 886 71 2ms 7 May 2022 607th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 607th stefangimmillaro 886 71 2ms 2 Jun 2023 607th 09cf 886 71 7ms 4 Oct 2023 607th kkoenig 886 71 2ms 21 Dec 2023 607th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 607th masinag 🇮🇹 886 71 2ms 6 Oct 2024 607th Herbert00709 🇵🇱 886 71 3ms 3 days ago 617th steffan-polygolf 886 74 132ms 14 Feb 2024 617th prestosilver 🇺🇸 886 74 134ms 18 Dec 2025 619th Shanethegamer 🇺🇸 886 82 17ms 19 Dec 2023 619th edsrzf 🇳🇿 886 82 17ms 6 Jan 2025 621st SiestaGuru 886 88 419ms 9 Jan 2023 621st rifatx 886 88 438ms 5 Jul 2024 621st kmathis22 886 88 463ms 25 Sep 2025 624th m-tkach 🇺🇦 885 59 428ms 21 Jan 2024 624th GolfingSuccess 🇬🇷 885 59 475ms 20 Jan 2025 624th duckyluuk 🇳🇱 885 59 528ms 4 Dec 2025 627th Steffan153 🇫🇮 885 75 2,579ms 18 days ago 628th nipzu 885 94 128ms 17 May 2022 628th Natanaelel 🇸🇪 885 94 130ms 17 Jun 2022 628th nkoppel 885 94 128ms 19 Oct 2022 628th ovs-code 🇩🇪 885 94 131ms 21 Jun 2023 628th mousetail 🇳🇱 885 94 136ms 12 Jan 2024 633rd Irratix 🇳🇱 885 96 60ms 4 May 2022 633rd MeWhenI 🇻🇦 885 96 62ms 1 Jun 2022 633rd janbehrens 🇩🇪 885 96 58ms 21 Apr 2023 633rd Shanethegamer 🇺🇸 885 96 62ms 15 May 2023 633rd Yewzir 🇧🇪 885 96 71ms 11 Nov 2023 633rd MateuszPietrzak 🇵🇱 885 96 63ms 18 Nov 2023 633rd kkoenig 885 96 62ms 21 Dec 2023 633rd BlankSpruce 885 96 62ms 20 Aug 2024 First Prev 561–640 of 3,770 Next Last