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 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 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 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 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 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 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 465th kops-cg 896 69 23ms 9 Feb 2025 465th sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 465th plcc0 896 69 16ms 26 Mar 2025 465th yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 465th moustave 896 69 16ms 10 Jun 2025 465th 4atj 896 69 3,504ms 30 Jun 2025 465th dirckvdende 896 69 17ms 11 Jul 2025 465th xnor-gate 896 69 17ms 19 Aug 2025 465th BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 465th Mukundan314 896 69 18ms 13 Nov 2025 465th bizy-coder 896 69 18ms 21 Nov 2025 465th duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 465th bricknellj 896 69 17ms 4 Dec 2025 465th Seek64 🇩🇪 896 69 17ms 26 Dec 2025 495th MichalMarsalek 🇨🇿 896 87 436ms 5 May 2022 495th Kloppermand 🇩🇰 896 87 414ms 7 Oct 2022 495th bwat2 896 87 397ms 6 Apr 2023 495th bpharaldsson 896 87 353ms 15 days ago 499th m-tkach 🇺🇦 896 117 25ms 7 May 2022 499th Lydxn 🇨🇦 896 117 26ms 7 May 2022 501st DialFrost 🇸🇬 895 74 17ms 2 days ago 501st Steffan153 🇫🇮 895 74 16ms 2 days ago 501st GrayJoKing 🇦🇺 895 74 17ms 2 days ago 501st GolfingSuccess 🇬🇷 895 74 17ms 18 hours ago 505th Shanethegamer 🇺🇸 894 61 4ms 31 Oct 2022 505th MeWhenI 🇻🇦 894 61 4ms 4 Nov 2022 507th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 508th oeb25 894 93 119ms 16 May 2022 508th snobee 🇨🇦 894 93 116ms 8 Dec 2022 508th logvp 894 93 121ms 2 Jan 2024 508th smartiel 894 93 119ms 12 Aug 2024 508th trist224 🇫🇷 894 93 121ms 12 Aug 2024 508th nullie 894 93 120ms 19 Dec 2024 508th lolgeny 894 93 124ms 22 Feb 2025 515th GolfingSuccess 🇬🇷 894 95 64ms 5 May 2022 515th Alex-x90 🇺🇸 894 95 60ms 4 Dec 2022 515th Mandrzejy 🇵🇱 894 95 59ms 22 Mar 2024 518th Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 518th blaztoma 🇱🇹 893 52 7ms 18 Jan 2026 520th Yewzir 🇧🇪 893 72 110ms 20 Nov 2025 521st KatieLG 🇬🇧 892 60 19ms 4 May 2022 521st ScottHamper 892 60 10ms 5 May 2022 521st Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 521st 0x24a537r9 892 60 10ms 29 Jul 2022 521st stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 521st eranws 892 60 11ms 10 Sep 2022 521st GeorgeStechman 🇬🇧 892 60 11ms 26 Sep 2022 521st BloodStormKnight 892 60 12ms 15 Oct 2022 521st dzshn 892 60 11ms 3 Dec 2022 521st biocommando 🇫🇮 892 60 10ms 20 Dec 2022 521st Betuaredead 892 60 11ms 5 Jan 2023 521st piano-miles 892 60 10ms 16 Jan 2023 521st Yewzir 🇧🇪 892 60 12ms 12 Feb 2023 521st shellbertt 🇨🇦 892 60 11ms 26 Feb 2023 521st zakariamouhid 892 60 11ms 20 May 2023 521st raphaelimahorn 892 60 10ms 23 Aug 2023 521st jbt 892 60 10ms 25 Dec 2023 521st olleicua 🇺🇸 892 60 10ms 15 Feb 2024 521st HumanoidCPU 892 60 10ms 3 May 2024 521st dokutan 892 60 10ms 13 Aug 2024 521st LostSyntax21 🇬🇧 892 60 11ms 10 Sep 2024 521st xyangst 892 60 11ms 28 Sep 2024 521st a6166231 🇨🇳 892 60 11ms 15 May 2025 521st Protothor 892 60 10ms 8 Jul 2025 521st SebassNoob 892 60 12ms 5 Aug 2025 521st levinwinter 892 60 11ms 22 Oct 2025 521st Cube14yt 892 60 11ms 16 Nov 2025 521st gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 521st amazingalek 🇳🇴 892 60 13ms 20 Dec 2025 521st shandriy 892 60 11ms 23 Jan 2026 521st spidunno 892 60 10ms 7 days ago 552nd lynn 892 65 283ms 5 May 2022 552nd GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 552nd Sakisan 🇧🇪 892 65 178ms 6 May 2022 552nd JayXon 🇺🇸 892 65 301ms 17 Oct 2022 552nd Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 552nd tobeannouncd 892 65 302ms 25 Apr 2025 552nd sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 559th stefangimmillaro 892 71 89ms 2 Oct 2022 559th Steffan153 🇫🇮 892 71 96ms 23 Feb 2023 First Prev 481–560 of 3,596 Next Last