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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 64th two-bad 🇬🇧 956 56 13ms 23 Feb 2024 64th mehbark 956 56 11ms 27 Jul 2024 64th madeforlosers 956 56 11ms 4 Nov 2024 64th XenThe 🇬🇧 956 56 10ms 6 Jun 2025 64th Tristanchaang 956 56 11ms 13 Nov 2025 64th JOrE20 🇺🇸 956 56 10ms 4 hours ago 87th Lydxn 🇨🇦 953 89 57ms 6 May 2022 87th JayXon 🇺🇸 953 89 55ms 7 May 2022 87th nwellnhof 🇩🇪 953 89 59ms 5 Jun 2022 87th snyderek 🇺🇸 953 89 55ms 19 Feb 2025 91st 2bular 952 32 27ms 17 Oct 2024 92nd ovs-code 🇩🇪 950 61 248ms 5 Aug 2024 93rd Lydxn 🇨🇦 950 82 446ms 6 May 2022 93rd JayXon 🇺🇸 950 82 383ms 9 May 2022 95th Lydxn 🇨🇦 949 55 808ms 16 Jan 2024 95th ovs-code 🇩🇪 949 55 835ms 16 Jan 2024 95th Steffan153 🇫🇮 949 55 397ms 16 Jan 2024 95th kg583 🇺🇸 949 55 403ms 16 Feb 2024 95th Shanethegamer 🇺🇸 949 55 407ms 24 Mar 2024 95th pardouin 🇫🇷 949 55 400ms 30 Jun 2024 95th JayXon 🇺🇸 949 55 391ms 17 Aug 2024 95th sean-niemann 🇺🇸 949 55 382ms 24 Jan 2025 103rd Lydxn 🇨🇦 949 59 11ms 6 May 2022 104th JayXon 🇺🇸 948 88 497ms 24 Sep 2025 104th Lydxn 🇨🇦 948 88 409ms 12 Dec 2025 106th primo-ppcg 🇹🇭 947 49 6ms 5 May 2022 106th Lydxn 🇨🇦 947 49 6ms 8 May 2022 108th lyphyser 946 46 49ms 13 Jan 2024 108th AdrienHache 🇫🇷 946 46 51ms 9 Apr 2024 110th saito-ta 🇯🇵 945 49 65ms 13 May 2022 110th Lydxn 🇨🇦 945 49 66ms 28 May 2022 112th JayXon 🇺🇸 945 88 126ms 17 Oct 2022 112th acotis 945 88 118ms 9 Jun 2025 112th kumavale 945 88 132ms 7 Oct 2025 115th canissimia 🇦🇶 941 50 40ms 5 May 2022 115th ovs-code 🇩🇪 941 50 244ms 7 May 2022 115th sisyphus-ppcg 🇦🇺 941 50 43ms 20 Feb 2023 115th Steffan153 🇫🇮 941 50 45ms 20 Jul 2024 115th sean-niemann 🇺🇸 941 50 43ms 9 Jun 2025 115th pardouin 🇫🇷 941 50 41ms 22 Aug 2025 121st canissimia 🇦🇶 940 51 1,302ms 6 May 2022 121st Lydxn 🇨🇦 940 51 1,280ms 6 May 2022 121st primo-ppcg 🇹🇭 940 51 1,309ms 6 May 2022 121st pardouin 🇫🇷 940 51 1,391ms 12 Apr 2025 125th primo-ppcg 🇹🇭 940 58 5ms 13 Nov 2022 125th clockworknazo 940 58 6ms 15 Nov 2022 125th Lydxn 🇨🇦 940 58 6ms 7 Feb 2023 125th xsot 🇸🇬 940 58 6ms 28 Jun 2024 125th Salutations45 940 58 6ms 18 Dec 2024 125th canissimia 🇦🇶 940 58 6ms 12 Dec 2025 131st inventshah 939 57 11ms 4 May 2022 131st itsh01 939 57 12ms 17 May 2022 131st Natanaelel 🇸🇪 939 57 12ms 16 Jun 2022 131st Attero 🇸🇪 939 57 12ms 3 Aug 2022 131st SirFireball3521 939 57 14ms 26 Jan 2023 131st Kacarott 🇦🇺 939 57 11ms 24 Mar 2023 131st nathanadams 🇳🇿 939 57 11ms 24 Apr 2023 131st hacker112 🇸🇪 939 57 11ms 20 Jun 2024 131st thisishowmymindworks 🇳🇴 939 57 12ms 28 Jun 2024 131st Salutations45 939 57 11ms 18 Nov 2024 131st daniel-cardone 939 57 11ms 3 Jul 2025 131st CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 131st BrunoVisnadi 🇧🇷 939 57 10ms 21 Oct 2025 131st Laellekoenig 939 57 12ms 22 Oct 2025 131st Lv0Sys 🇵🇱 939 57 12ms 7 Dec 2025 146th Irratix 🇳🇱 939 83 446ms 4 May 2022 146th nwellnhof 🇩🇪 939 83 433ms 4 May 2022 146th ScottHamper 939 83 405ms 5 May 2022 146th Romain-1 🇫🇷 939 83 419ms 1 Jun 2022 146th Gaddy 🇫🇷 939 83 423ms 1 Jun 2022 146th 5quiwyrm 939 83 403ms 4 Sep 2022 146th Betuaredead 939 83 426ms 5 Jan 2023 146th Yewzir 🇧🇪 939 83 428ms 12 Feb 2023 146th btnlq 939 83 427ms 9 Mar 2023 146th Adix-null 🇱🇹 939 83 445ms 17 May 2023 146th AdrienHache 🇫🇷 939 83 360ms 8 Jun 2023 146th gblikas 939 83 386ms 23 Jul 2023 146th KrausRaus 🇺🇸 939 83 414ms 31 Jul 2023 146th namelessiw 939 83 435ms 9 Apr 2025 146th dokutan 939 83 414ms 9 Apr 2025 First Prev 81–160 of 3,547 Next Last