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 Dragon Curve 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 Dragon Curve 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 552nd biocommando 🇫🇮 892 60 14ms 20 Dec 2022 552nd Betuaredead 892 60 12ms 5 Jan 2023 552nd piano-miles 892 60 10ms 16 Jan 2023 552nd Yewzir 🇧🇪 892 60 12ms 12 Feb 2023 552nd shellbertt 🇨🇦 892 60 12ms 26 Feb 2023 552nd zakariamouhid 892 60 12ms 20 May 2023 552nd raphaelimahorn 892 60 11ms 23 Aug 2023 552nd jbt 892 60 11ms 25 Dec 2023 552nd olleicua 🇺🇸 892 60 12ms 15 Feb 2024 552nd HumanoidCPU 892 60 14ms 3 May 2024 552nd dokutan 892 60 11ms 13 Aug 2024 552nd LostSyntax21 🇬🇧 892 60 12ms 10 Sep 2024 552nd xyangst 892 60 14ms 28 Sep 2024 552nd a6166231 🇨🇳 892 60 12ms 15 May 2025 552nd SebassNoob 892 60 14ms 5 Aug 2025 552nd levinwinter 892 60 14ms 22 Oct 2025 552nd Cube14yt 892 60 11ms 16 Nov 2025 552nd gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 552nd amazingalek 🇳🇴 892 60 12ms 20 Dec 2025 552nd shandriy 892 60 12ms 23 Jan 2026 552nd spidunno 892 60 11ms 17 Feb 2026 582nd lynn 892 65 267ms 5 May 2022 582nd GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 582nd Sakisan 🇧🇪 892 65 178ms 6 May 2022 582nd JayXon 🇺🇸 892 65 271ms 17 Oct 2022 582nd Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 582nd tobeannouncd 892 65 302ms 25 Apr 2025 582nd sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 589th GrayJoKing 🇦🇺 892 77 76ms 13 Sep 2024 590th DialFrost 🇸🇬 892 95 30ms 10 Dec 2024 591st m-tkach 🇺🇦 892 112 116ms 22 Jun 2025 592nd canissimia 🇦🇶 892 204 16ms 25 Nov 2023 593rd ovs-code 🇩🇪 890 73 340ms 22 Jul 2023 594th Shanethegamer 🇺🇸 890 83 1,496ms 4 May 2022 595th mousetail 🇳🇱 889 41 66ms 29 Aug 2025 596th MeWhenI 🇻🇦 889 53 42ms 1 Jun 2022 596th stefangimmillaro 889 53 44ms 2 Oct 2022 596th Haksell 🇦🇶 889 53 43ms 22 Feb 2023 599th primo-ppcg 🇹🇭 889 85 39ms 14 Jan 2025 599th MeWhenI 🇻🇦 889 85 41ms 21 Apr 2025 601st janbehrens 🇩🇪 888 90 467ms 21 Apr 2023 601st Yewzir 🇧🇪 888 90 459ms 22 Apr 2023 601st Ripick 888 90 459ms 27 Nov 2024 601st emgordon154 888 90 441ms 10 Dec 2025 605th albanian-laundromat 🇺🇸 888 94 486ms 24 Sep 2025 605th jkelly467 888 94 401ms 23 Oct 2025 605th HumanoidCPU 888 94 479ms 8 Nov 2025 608th frosster 🇨🇦 887 77 5ms 8 Feb 2026 609th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 609th emplv 🇱🇻 886 71 2ms 5 May 2022 609th JayXon 🇺🇸 886 71 2ms 7 May 2022 609th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 609th stefangimmillaro 886 71 2ms 2 Jun 2023 609th 09cf 886 71 7ms 4 Oct 2023 609th kkoenig 886 71 2ms 21 Dec 2023 609th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 609th masinag 🇮🇹 886 71 2ms 6 Oct 2024 609th Herbert00709 🇵🇱 886 71 3ms 4 days ago 619th steffan-polygolf 886 74 132ms 14 Feb 2024 619th prestosilver 🇺🇸 886 74 134ms 18 Dec 2025 621st Shanethegamer 🇺🇸 886 82 17ms 19 Dec 2023 621st edsrzf 🇳🇿 886 82 17ms 6 Jan 2025 623rd SiestaGuru 886 88 434ms 9 Jan 2023 623rd rifatx 886 88 437ms 5 Jul 2024 623rd kmathis22 886 88 412ms 25 Sep 2025 626th m-tkach 🇺🇦 885 59 428ms 21 Jan 2024 626th GolfingSuccess 🇬🇷 885 59 475ms 20 Jan 2025 626th duckyluuk 🇳🇱 885 59 528ms 4 Dec 2025 629th Steffan153 🇫🇮 885 75 2,823ms 20 days ago 630th nipzu 885 94 128ms 17 May 2022 630th Natanaelel 🇸🇪 885 94 129ms 17 Jun 2022 630th nkoppel 885 94 128ms 19 Oct 2022 630th ovs-code 🇩🇪 885 94 131ms 21 Jun 2023 630th mousetail 🇳🇱 885 94 136ms 12 Jan 2024 635th Irratix 🇳🇱 885 96 60ms 4 May 2022 635th MeWhenI 🇻🇦 885 96 62ms 1 Jun 2022 635th janbehrens 🇩🇪 885 96 58ms 21 Apr 2023 635th Shanethegamer 🇺🇸 885 96 62ms 15 May 2023 635th Yewzir 🇧🇪 885 96 71ms 11 Nov 2023 635th MateuszPietrzak 🇵🇱 885 96 63ms 18 Nov 2023 First Prev 561–640 of 3,774 Next Last