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 471st pardouin 🇫🇷 896 69 18ms 11 Nov 2023 471st AlephSquirrel 896 69 476ms 30 Dec 2023 471st kg583 🇺🇸 896 69 25ms 28 Jan 2024 471st davecame 896 69 23ms 20 Aug 2024 471st zacjl 896 69 17ms 19 Sep 2024 471st starfihs 896 69 18ms 12 Oct 2024 471st kops-cg 896 69 23ms 9 Feb 2025 471st sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 471st plcc0 896 69 16ms 26 Mar 2025 471st yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 471st moustave 896 69 16ms 10 Jun 2025 471st 4atj 896 69 3,504ms 30 Jun 2025 471st dirckvdende 896 69 17ms 11 Jul 2025 471st xnor-gate 896 69 17ms 19 Aug 2025 471st BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 471st Mukundan314 896 69 18ms 13 Nov 2025 471st bizy-coder 896 69 18ms 21 Nov 2025 471st duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 471st bricknellj 896 69 17ms 4 Dec 2025 471st Seek64 🇩🇪 896 69 17ms 26 Dec 2025 501st MichalMarsalek 🇨🇿 896 87 436ms 5 May 2022 501st Kloppermand 🇩🇰 896 87 414ms 7 Oct 2022 501st bwat2 896 87 397ms 6 Apr 2023 501st bpharaldsson 896 87 353ms 9 Feb 2026 505th m-tkach 🇺🇦 896 117 25ms 7 May 2022 505th Lydxn 🇨🇦 896 117 26ms 7 May 2022 507th CaedenHarper 🇨🇦 894 54 1,451ms 27 Sep 2025 507th sean-niemann 🇺🇸 894 54 1,442ms 27 Sep 2025 507th albanian-laundromat 894 54 959ms 14 Nov 2025 507th xsot 🇸🇬 894 54 1,025ms 15 Nov 2025 511th Shanethegamer 🇺🇸 894 61 4ms 31 Oct 2022 511th MeWhenI 🇻🇦 894 61 4ms 4 Nov 2022 513th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 514th oeb25 894 93 137ms 16 May 2022 514th snobee 🇨🇦 894 93 127ms 8 Dec 2022 514th logvp 894 93 125ms 2 Jan 2024 514th smartiel 894 93 129ms 12 Aug 2024 514th trist224 🇫🇷 894 93 123ms 12 Aug 2024 514th nullie 894 93 124ms 19 Dec 2024 514th lolgeny 894 93 127ms 22 Feb 2025 521st GolfingSuccess 🇬🇷 894 95 58ms 5 May 2022 521st Alex-x90 🇺🇸 894 95 60ms 4 Dec 2022 521st Mandrzejy 🇵🇱 894 95 53ms 22 Mar 2024 524th Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 524th blaztoma 🇱🇹 893 52 7ms 18 Jan 2026 526th Yewzir 🇧🇪 893 72 148ms 20 Nov 2025 527th KatieLG 🇬🇧 892 60 13ms 4 May 2022 527th ScottHamper 892 60 11ms 5 May 2022 527th Re-Adventures 🇮🇳 892 60 11ms 5 May 2022 527th 0x24a537r9 892 60 11ms 29 Jul 2022 527th stefangabos 🇷🇴 892 60 12ms 19 Aug 2022 527th eranws 892 60 12ms 10 Sep 2022 527th GeorgeStechman 🇬🇧 892 60 12ms 26 Sep 2022 527th BloodStormKnight 892 60 11ms 15 Oct 2022 527th dzshn 892 60 11ms 3 Dec 2022 527th biocommando 🇫🇮 892 60 12ms 20 Dec 2022 527th Betuaredead 892 60 11ms 5 Jan 2023 527th piano-miles 892 60 12ms 16 Jan 2023 527th Yewzir 🇧🇪 892 60 11ms 12 Feb 2023 527th shellbertt 🇨🇦 892 60 11ms 26 Feb 2023 527th zakariamouhid 892 60 13ms 20 May 2023 527th raphaelimahorn 892 60 11ms 23 Aug 2023 527th jbt 892 60 12ms 25 Dec 2023 527th olleicua 🇺🇸 892 60 12ms 15 Feb 2024 527th HumanoidCPU 892 60 12ms 3 May 2024 527th dokutan 892 60 10ms 13 Aug 2024 527th LostSyntax21 🇬🇧 892 60 14ms 10 Sep 2024 527th xyangst 892 60 14ms 28 Sep 2024 527th a6166231 🇨🇳 892 60 15ms 15 May 2025 527th Protothor 892 60 10ms 8 Jul 2025 527th SebassNoob 892 60 13ms 5 Aug 2025 527th levinwinter 892 60 12ms 22 Oct 2025 527th Cube14yt 892 60 12ms 16 Nov 2025 527th gigaprofisi 🇺🇸 892 60 11ms 17 Nov 2025 527th amazingalek 🇳🇴 892 60 15ms 20 Dec 2025 527th shandriy 892 60 11ms 23 Jan 2026 527th spidunno 892 60 11ms 20 days ago 558th lynn 892 65 283ms 5 May 2022 558th GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 558th Sakisan 🇧🇪 892 65 178ms 6 May 2022 First Prev 481–560 of 3,615 Next Last