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 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 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 473rd Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 473rd AlexanderFair 896 69 24ms 19 Jul 2023 473rd pardouin 🇫🇷 896 69 18ms 11 Nov 2023 473rd AlephSquirrel 896 69 476ms 30 Dec 2023 473rd kg583 🇺🇸 896 69 25ms 28 Jan 2024 473rd davecame 896 69 23ms 20 Aug 2024 473rd zacjl 896 69 17ms 19 Sep 2024 473rd starfihs 896 69 18ms 12 Oct 2024 473rd kops-cg 896 69 23ms 9 Feb 2025 473rd sean-niemann 🇺🇸 896 69 19ms 7 Mar 2025 473rd plcc0 896 69 16ms 26 Mar 2025 473rd yujh-yujh 🇬🇸 896 69 17ms 28 Mar 2025 473rd moustave 896 69 16ms 10 Jun 2025 473rd 4atj 896 69 3,504ms 30 Jun 2025 473rd dirckvdende 896 69 17ms 11 Jul 2025 473rd xnor-gate 896 69 17ms 19 Aug 2025 473rd BrunoVisnadi 🇧🇷 896 69 24ms 1 Oct 2025 473rd Mukundan314 896 69 18ms 13 Nov 2025 473rd bizy-coder 896 69 18ms 21 Nov 2025 473rd duckyluuk 🇳🇱 896 69 18ms 4 Dec 2025 473rd bricknellj 896 69 17ms 4 Dec 2025 473rd Seek64 🇩🇪 896 69 17ms 26 Dec 2025 503rd MichalMarsalek 🇨🇿 896 87 436ms 5 May 2022 503rd Kloppermand 🇩🇰 896 87 414ms 7 Oct 2022 503rd bwat2 896 87 397ms 6 Apr 2023 503rd bpharaldsson 896 87 353ms 23 days ago 507th m-tkach 🇺🇦 896 117 25ms 7 May 2022 507th Lydxn 🇨🇦 896 117 26ms 7 May 2022 509th Shanethegamer 🇺🇸 894 61 4ms 31 Oct 2022 509th MeWhenI 🇻🇦 894 61 4ms 4 Nov 2022 511th JayXon 🇺🇸 894 74 2,178ms 14 Nov 2024 512th oeb25 894 93 119ms 16 May 2022 512th snobee 🇨🇦 894 93 116ms 8 Dec 2022 512th logvp 894 93 121ms 2 Jan 2024 512th smartiel 894 93 119ms 12 Aug 2024 512th trist224 🇫🇷 894 93 121ms 12 Aug 2024 512th nullie 894 93 120ms 19 Dec 2024 512th lolgeny 894 93 124ms 22 Feb 2025 519th GolfingSuccess 🇬🇷 894 95 58ms 5 May 2022 519th Alex-x90 🇺🇸 894 95 60ms 4 Dec 2022 519th Mandrzejy 🇵🇱 894 95 53ms 22 Mar 2024 522nd Steffan153 🇫🇮 893 52 7ms 31 Dec 2022 522nd blaztoma 🇱🇹 893 52 7ms 18 Jan 2026 524th Yewzir 🇧🇪 893 72 110ms 20 Nov 2025 525th KatieLG 🇬🇧 892 60 10ms 4 May 2022 525th ScottHamper 892 60 10ms 5 May 2022 525th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 525th 0x24a537r9 892 60 10ms 29 Jul 2022 525th stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 525th eranws 892 60 10ms 10 Sep 2022 525th GeorgeStechman 🇬🇧 892 60 10ms 26 Sep 2022 525th BloodStormKnight 892 60 10ms 15 Oct 2022 525th dzshn 892 60 11ms 3 Dec 2022 525th biocommando 🇫🇮 892 60 10ms 20 Dec 2022 525th Betuaredead 892 60 11ms 5 Jan 2023 525th piano-miles 892 60 10ms 16 Jan 2023 525th Yewzir 🇧🇪 892 60 12ms 12 Feb 2023 525th shellbertt 🇨🇦 892 60 11ms 26 Feb 2023 525th zakariamouhid 892 60 10ms 20 May 2023 525th raphaelimahorn 892 60 10ms 23 Aug 2023 525th jbt 892 60 10ms 25 Dec 2023 525th olleicua 🇺🇸 892 60 10ms 15 Feb 2024 525th HumanoidCPU 892 60 10ms 3 May 2024 525th dokutan 892 60 10ms 13 Aug 2024 525th LostSyntax21 🇬🇧 892 60 11ms 10 Sep 2024 525th xyangst 892 60 11ms 28 Sep 2024 525th a6166231 🇨🇳 892 60 10ms 15 May 2025 525th Protothor 892 60 9ms 8 Jul 2025 525th SebassNoob 892 60 10ms 5 Aug 2025 525th levinwinter 892 60 11ms 22 Oct 2025 525th Cube14yt 892 60 11ms 16 Nov 2025 525th gigaprofisi 🇺🇸 892 60 10ms 17 Nov 2025 525th amazingalek 🇳🇴 892 60 10ms 20 Dec 2025 525th shandriy 892 60 10ms 23 Jan 2026 525th spidunno 892 60 10ms 15 days ago 556th lynn 892 65 283ms 5 May 2022 556th GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 556th Sakisan 🇧🇪 892 65 178ms 6 May 2022 556th JayXon 🇺🇸 892 65 301ms 17 Oct 2022 556th Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 First Prev 481–560 of 3,611 Next Last