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 Binary Lambda Calculus Calendar 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 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 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 649th eiburns 887 73 24ms 9 Oct 2023 649th htareque 887 73 23ms 13 Oct 2023 649th wearsunscreen 887 73 20ms 18 Oct 2023 649th bzijlema 🇳🇱 887 73 21ms 25 Oct 2023 649th Grrisly 887 73 20ms 10 Nov 2023 649th m42km 887 73 25ms 11 Nov 2023 649th GeneralPoxter 887 73 24ms 7 Dec 2023 649th logvp 887 73 23ms 12 Jan 2024 649th JoaoFelipe3 887 73 24ms 13 Jan 2024 649th ehulinsky 🇺🇸 887 73 27ms 16 Feb 2024 649th Lewenhaupt 887 73 20ms 23 Feb 2024 649th Yewzir 🇧🇪 887 73 20ms 5 Apr 2024 649th stertooy 🇧🇪 887 73 20ms 9 Jun 2024 649th cuboids 887 73 21ms 11 Jul 2024 649th jipsong 🇩🇪 887 73 22ms 23 Jul 2024 649th mattyhempstead 887 73 21ms 6 Oct 2024 649th wh3n3v3r 🇨🇿 887 73 28ms 18 Nov 2024 649th klixel 🇨🇦 887 73 20ms 18 Nov 2024 649th tjwrenn 887 73 22ms 10 Dec 2024 649th nullie 887 73 24ms 19 Dec 2024 649th maxgodfrey2004 🇨🇦 887 73 33ms 13 Feb 2025 649th lolgeny 887 73 21ms 22 Feb 2025 649th andrewjc2000 887 73 33ms 23 Feb 2025 649th Languag3 887 73 21ms 27 Feb 2025 649th Bulmenisaurus 887 73 24ms 2 Mar 2025 649th souta-1326 887 73 20ms 1 Apr 2025 649th BenjaminHGong 887 73 22ms 26 May 2025 649th FEZfan 🇦🇺 887 73 20ms 11 Jul 2025 649th wuduculfre 887 73 23ms 28 Jul 2025 649th BREMAUCY 🇫🇷 887 73 24ms 24 Aug 2025 649th FortuiteMan 🇫🇷 887 73 22ms 28 Sep 2025 649th miaoaixuan 887 73 23ms 30 Sep 2025 708th albanian-laundromat 887 94 339ms 24 Sep 2025 708th kmathis22 887 94 340ms 14 Oct 2025 708th jkelly467 887 94 339ms 21 days ago 708th HumanoidCPU 887 94 337ms 6 days ago 712th Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 712th Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 714th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 715th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 715th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 715th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 715th Ripick 886 90 439ms 27 Nov 2024 719th m-tkach 🇺🇦 886 112 69ms 22 Jun 2025 720th GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 720th emplv 🇱🇻 885 71 3ms 5 May 2022 720th JayXon 🇺🇸 885 71 2ms 7 May 2022 720th nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 720th stefangimmillaro 885 71 2ms 2 Jun 2023 720th 09cf 885 71 2ms 4 Oct 2023 720th kkoenig 885 71 3ms 21 Dec 2023 720th sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 720th masinag 🇮🇹 885 71 2ms 6 Oct 2024 729th SiestaGuru 885 88 325ms 9 Jan 2023 729th rifatx 885 88 312ms 5 Jul 2024 729th kmathis22 885 88 349ms 25 Sep 2025 729th arcpolaris 885 88 297ms 6 days ago 733rd m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 733rd GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 735th steffan-polygolf 884 74 130ms 14 Feb 2024 736th kg583 🇺🇸 884 84 17ms 30 Jul 2025 737th nipzu 884 94 136ms 17 May 2022 737th Natanaelel 🇸🇪 884 94 136ms 17 Jun 2022 737th nkoppel 884 94 149ms 19 Oct 2022 737th ovs-code 🇩🇪 884 94 151ms 21 Jun 2023 737th mousetail 🇳🇱 884 94 142ms 12 Jan 2024 742nd MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 742nd edsrzf 🇳🇿 884 110 247ms 28 Nov 2024 742nd targrik 884 110 248ms 30 Jun 2025 745th Irratix 🇳🇱 883 96 53ms 4 May 2022 745th MeWhenI 🇻🇦 883 96 56ms 1 Jun 2022 745th janbehrens 🇩🇪 883 96 54ms 21 Apr 2023 745th Shanethegamer 🇺🇸 883 96 56ms 15 May 2023 745th Yewzir 🇧🇪 883 96 57ms 11 Nov 2023 745th MateuszPietrzak 🇵🇱 883 96 56ms 18 Nov 2023 First Prev 676–750 of 3,462 Next Last
