Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Calendar Connect Four 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 Calendar Connect Four 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 601st LostSyntax21 🇬🇧 901 74 20ms 10 Sep 2024 601st Deedogg 901 74 20ms 11 Sep 2024 601st MassimoParisi 901 74 23ms 18 Sep 2024 601st lifthrasiir 🇰🇷 901 74 19ms 13 Nov 2024 601st agreegious 901 74 18ms 17 Nov 2024 601st Stockoh 🇫🇷 901 74 25ms 17 Nov 2024 601st Andrey135296 901 74 20ms 24 Nov 2024 601st TralfamadorianComedian 901 74 19ms 6 Dec 2024 601st bltnppcnt 901 74 35ms 3 Jan 2025 601st ZorblaxV 901 74 27ms 12 Jan 2025 601st yokasuretsu 901 74 21ms 13 Jan 2025 601st Artemis21 🇬🇧 901 74 18ms 17 Jan 2025 601st gdpr777 901 74 35ms 10 Feb 2025 601st Pyroan 901 74 22ms 27 Mar 2025 601st Squimbletin 901 74 20ms 19 Apr 2025 601st Kowalskiexe 🇵🇱 901 74 21ms 19 Apr 2025 601st Dandandooo 901 74 22ms 23 Apr 2025 601st khangtm123 901 74 20ms 4 May 2025 601st 40fied4t 901 74 24ms 6 May 2025 601st keelimeguy 🇺🇸 901 74 20ms 13 May 2025 601st TheZwierzLF 🇵🇱 901 74 20ms 21 May 2025 601st kbeat 🇰🇿 901 74 23ms 21 May 2025 601st LvLError 901 74 19ms 29 May 2025 601st Lv0Sys 🇵🇱 901 74 18ms 30 May 2025 601st ffelixm 901 74 25ms 3 Jun 2025 601st Flekay 🇩🇪 901 74 27ms 19 Jun 2025 601st DoubleUynn 901 74 20ms 25 Jun 2025 601st osNiko 🇧🇷 901 74 20ms 26 Jul 2025 601st wobblybits 901 74 20ms 13 Aug 2025 601st denisfouchard 901 74 22ms 23 Aug 2025 601st Emutis 🇱🇹 901 74 31ms 23 Aug 2025 601st edsrzf 🇳🇿 901 74 20ms 10 Sep 2025 601st Matter1024 🇮🇳 901 74 20ms 11 Sep 2025 601st pauljoohyunkim 901 74 20ms 25 Sep 2025 601st joll05 🇸🇪 901 74 25ms 1 Oct 2025 601st retrohun 901 74 27ms 3 Oct 2025 601st solisolu 901 74 21ms 4 Oct 2025 601st Code-Coder-coder 901 74 19ms 23 days ago 601st fvla 901 74 23ms 4 days ago 715th Lydxn 🇨🇦 900 108 290ms 6 May 2022 715th CaedenHarper 🇨🇦 900 108 237ms 5 Oct 2025 717th SirBogman 🇺🇸 899 50 414ms 5 May 2022 717th nwellnhof 🇩🇪 899 50 429ms 3 Jun 2022 717th Lydxn 🇨🇦 899 50 415ms 15 Aug 2022 717th Steffan153 🇫🇮 899 50 448ms 9 Aug 2024 721st DialFrost 🇸🇬 899 69 94ms 15 Jul 2024 722nd Lydxn 🇨🇦 898 48 285ms 5 May 2022 722nd p-zubieta 898 48 249ms 6 Mar 2024 724th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 724th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 724th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 724th trinityy-7 898 70 2ms 7 Aug 2025 724th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 729th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 730th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 731st DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 732nd Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 732nd rucin93 🇵🇱 897 59 136ms 13 Oct 2024 732nd sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 732nd lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 736th edsrzf 🇳🇿 897 78 12ms 26 Oct 2024 736th kg583 🇺🇸 897 78 11ms 25 Sep 2025 738th Ripick 896 73 121ms 8 May 2023 739th MichalMarsalek 🇨🇿 895 87 334ms 5 May 2022 739th Kloppermand 🇩🇰 895 87 343ms 7 Oct 2022 739th bwat2 895 87 321ms 6 Apr 2023 742nd ovs-code 🇩🇪 895 89 457ms 24 Jul 2024 742nd jipsong 🇩🇪 895 89 467ms 7 Apr 2025 744th oeb25 894 93 119ms 16 May 2022 744th snobee 🇨🇦 894 93 122ms 8 Dec 2022 744th logvp 894 93 125ms 2 Jan 2024 744th elgan65536 894 93 122ms 5 Mar 2024 744th smartiel 894 93 124ms 12 Aug 2024 744th trist224 🇫🇷 894 93 127ms 12 Aug 2024 744th nullie 894 93 128ms 19 Dec 2024 First Prev 676–750 of 3,422 Next Last
