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 67th weliveinhell 🇭🇹 956 56 12ms 2 Oct 2023 67th coreynash 956 56 10ms 6 Oct 2023 67th dylanarmstrong 956 56 12ms 10 Dec 2023 67th two-bad 🇬🇧 956 56 11ms 23 Feb 2024 67th mehbark 956 56 13ms 27 Jul 2024 67th madeforlosers 956 56 11ms 4 Nov 2024 67th XenThe 🇬🇧 956 56 11ms 6 Jun 2025 67th Tristanchaang 956 56 10ms 13 Nov 2025 67th Lv0Sys 🇵🇱 956 56 11ms 27 Feb 2026 67th edsrzf 🇳🇿 956 56 11ms 26 days ago 67th DayDun 🇸🇪 956 56 12ms 3 hours ago 92nd Lydxn 🇨🇦 954 89 61ms 6 May 2022 92nd JayXon 🇺🇸 954 89 58ms 7 May 2022 92nd nwellnhof 🇩🇪 954 89 62ms 5 Jun 2022 92nd snyderek 🇺🇸 954 89 57ms 19 Feb 2025 96th 2bular 952 32 27ms 17 Oct 2024 97th Lydxn 🇨🇦 951 82 390ms 6 May 2022 97th JayXon 🇺🇸 951 82 380ms 9 May 2022 99th ovs-code 🇩🇪 950 61 248ms 5 Aug 2024 100th Lydxn 🇨🇦 949 55 754ms 16 Jan 2024 100th ovs-code 🇩🇪 949 55 803ms 16 Jan 2024 100th Steffan153 🇫🇮 949 55 441ms 16 Jan 2024 100th kg583 🇺🇸 949 55 421ms 16 Feb 2024 100th Shanethegamer 🇺🇸 949 55 438ms 24 Mar 2024 100th pardouin 🇫🇷 949 55 410ms 30 Jun 2024 100th JayXon 🇺🇸 949 55 419ms 17 Aug 2024 100th sean-niemann 🇺🇸 949 55 467ms 24 Jan 2025 108th Lydxn 🇨🇦 949 59 10ms 6 May 2022 109th primo-ppcg 🇹🇭 948 49 7ms 5 May 2022 109th Lydxn 🇨🇦 948 49 6ms 8 May 2022 111th JayXon 🇺🇸 948 88 368ms 24 Sep 2025 111th Lydxn 🇨🇦 948 88 409ms 12 Dec 2025 113th lyphyser 946 46 49ms 13 Jan 2024 113th AdrienHache 🇫🇷 946 46 53ms 9 Apr 2024 115th JayXon 🇺🇸 946 88 139ms 17 Oct 2022 115th acotis 946 88 133ms 9 Jun 2025 115th kumavale 946 88 129ms 7 Oct 2025 118th saito-ta 🇯🇵 945 49 65ms 13 May 2022 118th Lydxn 🇨🇦 945 49 66ms 28 May 2022 118th Steffan153 🇫🇮 945 49 77ms 5 days ago 121st canissimia 🇦🇶 942 50 42ms 5 May 2022 121st ovs-code 🇩🇪 942 50 223ms 7 May 2022 121st sisyphus-ppcg 🇦🇺 942 50 42ms 20 Feb 2023 121st Steffan153 🇫🇮 942 50 44ms 20 Jul 2024 121st sean-niemann 🇺🇸 942 50 44ms 9 Jun 2025 121st pardouin 🇫🇷 942 50 40ms 22 Aug 2025 127th canissimia 🇦🇶 941 51 1,302ms 6 May 2022 127th Lydxn 🇨🇦 941 51 1,280ms 6 May 2022 127th primo-ppcg 🇹🇭 941 51 1,309ms 6 May 2022 127th pardouin 🇫🇷 941 51 1,391ms 12 Apr 2025 131st primo-ppcg 🇹🇭 940 58 4ms 13 Nov 2022 131st clockworknazo 940 58 5ms 15 Nov 2022 131st Lydxn 🇨🇦 940 58 5ms 7 Feb 2023 131st xsot 🇸🇬 940 58 5ms 28 Jun 2024 131st Salutations45 940 58 5ms 18 Dec 2024 131st canissimia 🇦🇶 940 58 5ms 12 Dec 2025 137th inventshah 939 57 15ms 4 May 2022 137th itsh01 939 57 10ms 17 May 2022 137th Natanaelel 🇸🇪 939 57 12ms 16 Jun 2022 137th Attero 🇸🇪 939 57 12ms 3 Aug 2022 137th SirFireball3521 939 57 11ms 26 Jan 2023 137th Kacarott 🇦🇺 939 57 10ms 24 Mar 2023 137th nathanadams 🇳🇿 939 57 12ms 24 Apr 2023 137th hacker112 🇸🇪 939 57 12ms 20 Jun 2024 137th thisishowmymindworks 🇳🇴 939 57 13ms 28 Jun 2024 137th Salutations45 939 57 11ms 18 Nov 2024 137th daniel-cardone 939 57 10ms 3 Jul 2025 137th CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 137th BrunoVisnadi 🇧🇷 939 57 11ms 21 Oct 2025 137th Laellekoenig 939 57 10ms 22 Oct 2025 137th madex 🇩🇪 939 57 18ms 20 days ago 152nd Irratix 🇳🇱 939 83 388ms 4 May 2022 152nd nwellnhof 🇩🇪 939 83 383ms 4 May 2022 152nd ScottHamper 939 83 380ms 5 May 2022 152nd Romain-1 🇫🇷 939 83 381ms 1 Jun 2022 152nd Gaddy 🇫🇷 939 83 398ms 1 Jun 2022 152nd 5quiwyrm 939 83 379ms 4 Sep 2022 152nd Betuaredead 939 83 391ms 5 Jan 2023 152nd Yewzir 🇧🇪 939 83 365ms 12 Feb 2023 152nd btnlq 939 83 388ms 9 Mar 2023 First Prev 81–160 of 3,665 Next Last