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 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 Calendar 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 NFA Simulator 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 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 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 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 Calendar 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 NFA Simulator 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 502nd SebassNoob 892 60 10ms 5 Aug 2025 502nd Yax42 🇫🇷 892 60 10ms 5 Sep 2025 502nd levinwinter 892 60 12ms 22 Oct 2025 502nd Cube14yt 892 60 10ms 15 days ago 502nd gigaprofisi 🇺🇸 892 60 10ms 13 days ago 531st stefangimmillaro 892 71 89ms 2 Oct 2022 531st Steffan153 🇫🇮 892 71 90ms 23 Feb 2023 531st Shanethegamer 🇺🇸 892 71 89ms 16 May 2023 531st sean-niemann 🇺🇸 892 71 87ms 12 Jul 2024 535th RockOfStone 892 73 5ms 20 Oct 2025 536th sean-niemann 🇺🇸 892 109 261ms 25 May 2024 536th GolfingSuccess 🇬🇷 892 109 252ms 6 Sep 2025 538th lynn 891 65 316ms 5 May 2022 538th GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 538th Sakisan 🇧🇪 891 65 214ms 6 May 2022 538th JayXon 🇺🇸 891 65 366ms 17 Oct 2022 538th Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 538th tobeannouncd 891 65 331ms 25 Apr 2025 538th sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 545th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 546th DialFrost 🇸🇬 891 95 32ms 10 Dec 2024 547th canissimia 🇦🇶 891 110 3,068ms 20 Feb 2023 548th primo-ppcg 🇹🇭 890 52 213ms 5 May 2022 548th dvargas46 🇺🇸 890 52 83ms 22 Dec 2022 550th jared-hughes 890 130 23ms 15 Dec 2024 551st canissimia 🇦🇶 890 204 16ms 25 Nov 2023 552nd mousetail 🇳🇱 888 41 73ms 29 Aug 2025 553rd MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 553rd stefangimmillaro 888 53 38ms 2 Oct 2022 553rd Haksell 🇦🇶 888 53 40ms 22 Feb 2023 556th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 556th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 558th albanian-laundromat 887 94 339ms 24 Sep 2025 558th jkelly467 887 94 339ms 23 Oct 2025 558th HumanoidCPU 887 94 337ms 22 days ago 561st Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 561st Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 563rd ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 564th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 564th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 564th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 564th Ripick 886 90 439ms 27 Nov 2024 568th m-tkach 🇺🇦 886 112 71ms 22 Jun 2025 569th GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 569th emplv 🇱🇻 885 71 3ms 5 May 2022 569th JayXon 🇺🇸 885 71 2ms 7 May 2022 569th nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 569th stefangimmillaro 885 71 2ms 2 Jun 2023 569th 09cf 885 71 2ms 4 Oct 2023 569th kkoenig 885 71 3ms 21 Dec 2023 569th sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 569th masinag 🇮🇹 885 71 2ms 6 Oct 2024 578th SiestaGuru 885 88 314ms 9 Jan 2023 578th rifatx 885 88 327ms 5 Jul 2024 578th kmathis22 885 88 343ms 25 Sep 2025 578th arcpolaris 885 88 344ms 23 days ago 582nd m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 582nd GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 584th steffan-polygolf 884 74 126ms 14 Feb 2024 585th kg583 🇺🇸 884 84 18ms 30 Jul 2025 586th nipzu 884 94 129ms 17 May 2022 586th Natanaelel 🇸🇪 884 94 130ms 17 Jun 2022 586th nkoppel 884 94 123ms 19 Oct 2022 586th ovs-code 🇩🇪 884 94 125ms 21 Jun 2023 586th mousetail 🇳🇱 884 94 127ms 12 Jan 2024 591st MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 591st edsrzf 🇳🇿 884 110 247ms 28 Nov 2024 591st targrik 884 110 248ms 30 Jun 2025 594th MichalMarsalek 🇨🇿 883 70 18ms 5 May 2022 594th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 594th SirBogman 🇺🇸 883 70 29ms 5 May 2022 594th prplz 🇦🇺 883 70 18ms 5 May 2022 594th Irratix 🇳🇱 883 70 16ms 7 May 2022 594th rak1507 🇬🇧 883 70 20ms 7 May 2022 594th inventshah 883 70 16ms 9 May 2022 First Prev 526–600 of 3,495 Next Last