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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 447th ovs-code 🇩🇪 896 69 22ms 5 May 2022 447th btnlq 896 69 16ms 5 May 2022 447th sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 447th lynn 896 69 17ms 22 Aug 2022 447th Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 447th AlexanderFair 896 69 24ms 19 Jul 2023 447th pardouin 🇫🇷 896 69 16ms 11 Nov 2023 447th AlephSquirrel 896 69 14ms 30 Dec 2023 447th kg583 🇺🇸 896 69 16ms 28 Jan 2024 447th davecame 896 69 25ms 20 Aug 2024 447th zacjl 896 69 17ms 19 Sep 2024 447th starfihs 896 69 16ms 12 Oct 2024 447th kops-cg 896 69 22ms 9 Feb 2025 447th sean-niemann 🇺🇸 896 69 17ms 7 Mar 2025 447th plcc0 896 69 15ms 26 Mar 2025 447th yujh-yujh 🇬🇸 896 69 57ms 28 Mar 2025 447th moustave 896 69 17ms 10 Jun 2025 447th 4atj 896 69 3,399ms 30 Jun 2025 447th dirckvdende 896 69 16ms 11 Jul 2025 447th xnor-gate 896 69 26ms 19 Aug 2025 447th BrunoVisnadi 🇧🇷 896 69 16ms 1 Oct 2025 447th Mukundan314 896 69 17ms 12 days ago 447th bizy-coder 896 69 16ms 4 days ago 474th Ripick 896 73 121ms 8 May 2023 475th ovs-code 🇩🇪 896 89 457ms 24 Jul 2024 475th jipsong 🇩🇪 896 89 467ms 7 Apr 2025 477th MichalMarsalek 🇨🇿 895 87 324ms 5 May 2022 477th Kloppermand 🇩🇰 895 87 326ms 7 Oct 2022 477th bwat2 895 87 317ms 6 Apr 2023 480th JayXon 🇺🇸 894 74 3,078ms 14 Nov 2024 481st oeb25 894 93 128ms 16 May 2022 481st snobee 🇨🇦 894 93 130ms 8 Dec 2022 481st logvp 894 93 123ms 2 Jan 2024 481st elgan65536 894 93 124ms 5 Mar 2024 481st smartiel 894 93 120ms 12 Aug 2024 481st trist224 🇫🇷 894 93 126ms 12 Aug 2024 481st nullie 894 93 126ms 19 Dec 2024 481st lolgeny 894 93 126ms 22 Feb 2025 489th Shanethegamer 🇺🇸 893 61 6ms 31 Oct 2022 489th MeWhenI 🇻🇦 893 61 5ms 4 Nov 2022 491st Yewzir 🇧🇪 893 72 92ms 5 days ago 492nd GolfingSuccess 🇬🇷 893 95 54ms 5 May 2022 492nd Alex-x90 🇺🇸 893 95 53ms 4 Dec 2022 492nd Mandrzejy 🇵🇱 893 95 53ms 22 Mar 2024 495th m-tkach 🇺🇦 893 117 27ms 7 May 2022 495th Lydxn 🇨🇦 893 117 28ms 7 May 2022 497th Steffan153 🇫🇮 892 52 7ms 31 Dec 2022 498th DialFrost 🇸🇬 892 56 820ms 1 Sep 2025 499th KatieLG 🇬🇧 892 60 11ms 4 May 2022 499th ScottHamper 892 60 10ms 5 May 2022 499th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 499th 0x24a537r9 892 60 10ms 29 Jul 2022 499th stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 499th eranws 892 60 11ms 10 Sep 2022 499th GeorgeStechman 🇬🇧 892 60 11ms 26 Sep 2022 499th BloodStormKnight 892 60 10ms 15 Oct 2022 499th dzshn 892 60 14ms 3 Dec 2022 499th biocommando 🇫🇮 892 60 10ms 20 Dec 2022 499th Betuaredead 892 60 10ms 5 Jan 2023 499th piano-miles 892 60 10ms 16 Jan 2023 499th Yewzir 🇧🇪 892 60 13ms 12 Feb 2023 499th shellbertt 🇨🇦 892 60 10ms 26 Feb 2023 499th zakariamouhid 892 60 10ms 20 May 2023 499th raphaelimahorn 892 60 10ms 23 Aug 2023 499th jbt 892 60 13ms 25 Dec 2023 499th olleicua 🇺🇸 892 60 10ms 15 Feb 2024 499th HumanoidCPU 892 60 12ms 3 May 2024 499th dokutan 892 60 10ms 13 Aug 2024 499th LostSyntax21 🇬🇧 892 60 10ms 10 Sep 2024 499th xyangst 892 60 10ms 28 Sep 2024 499th a6166231 🇨🇳 892 60 9ms 15 May 2025 499th Protothor 892 60 11ms 8 Jul 2025 499th SebassNoob 892 60 10ms 5 Aug 2025 499th Yax42 🇫🇷 892 60 10ms 5 Sep 2025 499th levinwinter 892 60 12ms 22 Oct 2025 First Prev 451–525 of 3,485 Next Last