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 401st Steffan153 🇫🇮 906 80 31ms 15 Nov 2022 401st error256 906 80 121ms 8 Apr 2025 403rd Shanethegamer 🇺🇸 906 82 18ms 19 Dec 2023 403rd edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 403rd kg583 🇺🇸 906 82 19ms 2 days ago 406th krcs 🇵🇱 906 86 387ms 10 May 2022 406th billings7 🇬🇧 906 86 418ms 15 May 2022 406th revlayle 🇺🇸 906 86 416ms 7 Dec 2022 406th Widgitty 906 86 403ms 1 Sep 2023 406th albanian-laundromat 906 86 412ms 30 Sep 2025 411th piano-miles 906 92 425ms 18 mins ago 412th shinh 905 52 37ms 29 Jun 2022 413th Lydxn 🇨🇦 905 70 86ms 7 May 2022 414th MeWhenI 🇻🇦 905 71 96ms 20 Aug 2024 415th m-tkach 🇺🇦 904 72 116ms 16 Oct 2022 415th GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 415th emplv 🇱🇻 904 72 107ms 27 Oct 2022 415th sean-niemann 🇺🇸 904 72 136ms 7 Mar 2025 419th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 419th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 421st stefangimmillaro 904 92 119ms 24 Oct 2023 421st inverseLorentz 🇦🇺 904 92 127ms 27 May 2024 421st sean-niemann 🇺🇸 904 92 138ms 8 Jun 2025 421st ian-h-chamberlain 🇺🇸 904 92 131ms 23 Nov 2025 425th michael-pruglo 🇺🇦 903 94 64ms 5 Jul 2022 425th zygoloid 903 94 54ms 5 Aug 2024 425th AdrienHache 🇫🇷 903 94 61ms 27 Dec 2025 428th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 428th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 428th btnlq 902 69 7ms 24 Sep 2022 431st albanian-laundromat 901 107 282ms 22 Dec 2025 432nd SirBogman 🇺🇸 900 50 449ms 5 May 2022 432nd nwellnhof 🇩🇪 900 50 423ms 3 Jun 2022 432nd Lydxn 🇨🇦 900 50 437ms 15 Aug 2022 432nd Steffan153 🇫🇮 900 50 501ms 9 Aug 2024 436th Steffan153 🇫🇮 900 67 112ms 18 Dec 2022 436th Lydxn 🇨🇦 900 67 116ms 4 Feb 2023 436th sean-niemann 🇺🇸 900 67 99ms 7 Mar 2025 439th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 440th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 440th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 440th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 440th trinityy-7 899 70 2ms 7 Aug 2025 440th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 445th GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 446th Lydxn 🇨🇦 898 48 257ms 5 May 2022 446th p-zubieta 898 48 299ms 6 Mar 2024 448th NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 448th edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 448th Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 448th jared-hughes 898 76 5ms 24 Dec 2025 448th Waffle3z 898 76 5ms 26 Dec 2025 448th Blendi-Goose 898 76 5ms 18 days ago 454th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 455th DialFrost 🇸🇬 897 29 160ms 15 Mar 2025 456th Steffan153 🇫🇮 897 59 143ms 10 Aug 2024 456th rucin93 🇵🇱 897 59 146ms 13 Oct 2024 456th sean-niemann 🇺🇸 897 59 130ms 13 Oct 2024 456th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 460th Ripick 897 73 122ms 8 May 2023 461st ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 461st jipsong 🇩🇪 897 89 450ms 7 Apr 2025 461st DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 461st dokutan 897 89 425ms 16 days ago 465th nwellnhof 🇩🇪 896 69 24ms 4 May 2022 465th m-tkach 🇺🇦 896 69 18ms 4 May 2022 465th GolfingSuccess 🇬🇷 896 69 17ms 5 May 2022 465th jared-hughes 896 69 17ms 5 May 2022 465th ovs-code 🇩🇪 896 69 23ms 5 May 2022 465th btnlq 896 69 17ms 5 May 2022 465th sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 465th lynn 896 69 18ms 22 Aug 2022 465th Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 465th AlexanderFair 896 69 24ms 19 Jul 2023 465th pardouin 🇫🇷 896 69 18ms 11 Nov 2023 465th AlephSquirrel 896 69 476ms 30 Dec 2023 465th kg583 🇺🇸 896 69 25ms 28 Jan 2024 465th davecame 896 69 23ms 20 Aug 2024 465th zacjl 896 69 17ms 19 Sep 2024 465th starfihs 896 69 18ms 12 Oct 2024 First Prev 401–480 of 3,596 Next Last