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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 67th weliveinhell 🇭🇹 956 56 15ms 2 Oct 2023 67th coreynash 956 56 11ms 6 Oct 2023 67th dylanarmstrong 956 56 13ms 10 Dec 2023 67th two-bad 🇬🇧 956 56 11ms 23 Feb 2024 67th mehbark 956 56 12ms 27 Jul 2024 67th madeforlosers 956 56 11ms 4 Nov 2024 67th XenThe 🇬🇧 956 56 11ms 6 Jun 2025 67th Tristanchaang 956 56 11ms 13 Nov 2025 67th Lv0Sys 🇵🇱 956 56 15ms 10 days ago 67th edsrzf 🇳🇿 956 56 11ms 13 mins ago 91st Lydxn 🇨🇦 954 89 55ms 6 May 2022 91st JayXon 🇺🇸 954 89 57ms 7 May 2022 91st nwellnhof 🇩🇪 954 89 56ms 5 Jun 2022 91st snyderek 🇺🇸 954 89 57ms 19 Feb 2025 95th 2bular 952 32 27ms 17 Oct 2024 96th ovs-code 🇩🇪 950 61 248ms 5 Aug 2024 97th Lydxn 🇨🇦 950 82 430ms 6 May 2022 97th JayXon 🇺🇸 950 82 383ms 9 May 2022 99th Lydxn 🇨🇦 949 55 793ms 16 Jan 2024 99th ovs-code 🇩🇪 949 55 803ms 16 Jan 2024 99th Steffan153 🇫🇮 949 55 441ms 16 Jan 2024 99th kg583 🇺🇸 949 55 421ms 16 Feb 2024 99th Shanethegamer 🇺🇸 949 55 438ms 24 Mar 2024 99th pardouin 🇫🇷 949 55 410ms 30 Jun 2024 99th JayXon 🇺🇸 949 55 419ms 17 Aug 2024 99th sean-niemann 🇺🇸 949 55 467ms 24 Jan 2025 107th Lydxn 🇨🇦 949 59 10ms 6 May 2022 108th JayXon 🇺🇸 948 88 368ms 24 Sep 2025 108th Lydxn 🇨🇦 948 88 409ms 12 Dec 2025 110th primo-ppcg 🇹🇭 947 49 6ms 5 May 2022 110th Lydxn 🇨🇦 947 49 7ms 8 May 2022 112th lyphyser 946 46 49ms 13 Jan 2024 112th AdrienHache 🇫🇷 946 46 53ms 9 Apr 2024 114th saito-ta 🇯🇵 945 49 65ms 13 May 2022 114th Lydxn 🇨🇦 945 49 66ms 28 May 2022 116th JayXon 🇺🇸 945 88 137ms 17 Oct 2022 116th acotis 945 88 129ms 9 Jun 2025 116th kumavale 945 88 135ms 7 Oct 2025 119th canissimia 🇦🇶 942 50 40ms 5 May 2022 119th ovs-code 🇩🇪 942 50 236ms 7 May 2022 119th sisyphus-ppcg 🇦🇺 942 50 42ms 20 Feb 2023 119th Steffan153 🇫🇮 942 50 43ms 20 Jul 2024 119th sean-niemann 🇺🇸 942 50 40ms 9 Jun 2025 119th pardouin 🇫🇷 942 50 40ms 22 Aug 2025 125th canissimia 🇦🇶 940 51 1,302ms 6 May 2022 125th Lydxn 🇨🇦 940 51 1,280ms 6 May 2022 125th primo-ppcg 🇹🇭 940 51 1,309ms 6 May 2022 125th pardouin 🇫🇷 940 51 1,391ms 12 Apr 2025 129th primo-ppcg 🇹🇭 940 58 4ms 13 Nov 2022 129th clockworknazo 940 58 5ms 15 Nov 2022 129th Lydxn 🇨🇦 940 58 5ms 7 Feb 2023 129th xsot 🇸🇬 940 58 5ms 28 Jun 2024 129th Salutations45 940 58 5ms 18 Dec 2024 129th canissimia 🇦🇶 940 58 5ms 12 Dec 2025 135th inventshah 939 57 12ms 4 May 2022 135th itsh01 939 57 15ms 17 May 2022 135th Natanaelel 🇸🇪 939 57 11ms 16 Jun 2022 135th Attero 🇸🇪 939 57 11ms 3 Aug 2022 135th SirFireball3521 939 57 14ms 26 Jan 2023 135th Kacarott 🇦🇺 939 57 12ms 24 Mar 2023 135th nathanadams 🇳🇿 939 57 11ms 24 Apr 2023 135th hacker112 🇸🇪 939 57 11ms 20 Jun 2024 135th thisishowmymindworks 🇳🇴 939 57 11ms 28 Jun 2024 135th Salutations45 939 57 11ms 18 Nov 2024 135th daniel-cardone 939 57 11ms 3 Jul 2025 135th CaedenHarper 🇨🇦 939 57 14ms 28 Sep 2025 135th BrunoVisnadi 🇧🇷 939 57 10ms 21 Oct 2025 135th Laellekoenig 939 57 11ms 22 Oct 2025 149th Irratix 🇳🇱 939 83 415ms 4 May 2022 149th nwellnhof 🇩🇪 939 83 391ms 4 May 2022 149th ScottHamper 939 83 405ms 5 May 2022 149th Romain-1 🇫🇷 939 83 419ms 1 Jun 2022 149th Gaddy 🇫🇷 939 83 423ms 1 Jun 2022 149th 5quiwyrm 939 83 403ms 4 Sep 2022 149th Betuaredead 939 83 426ms 5 Jan 2023 149th Yewzir 🇧🇪 939 83 428ms 12 Feb 2023 149th btnlq 939 83 425ms 9 Mar 2023 149th Adix-null 🇱🇹 939 83 445ms 17 May 2023 149th AdrienHache 🇫🇷 939 83 360ms 8 Jun 2023 149th gblikas 939 83 386ms 23 Jul 2023 First Prev 81–160 of 3,616 Next Last