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 647th wearsunscreen 887 73 20ms 18 Oct 2023 647th bzijlema 🇳🇱 887 73 21ms 25 Oct 2023 647th Grrisly 887 73 20ms 10 Nov 2023 647th m42km 887 73 25ms 11 Nov 2023 647th GeneralPoxter 887 73 24ms 7 Dec 2023 647th logvp 887 73 23ms 12 Jan 2024 647th JoaoFelipe3 887 73 24ms 13 Jan 2024 647th ehulinsky 🇺🇸 887 73 27ms 16 Feb 2024 647th Lewenhaupt 887 73 20ms 23 Feb 2024 647th Yewzir 🇧🇪 887 73 20ms 5 Apr 2024 647th stertooy 🇧🇪 887 73 20ms 9 Jun 2024 647th cuboids 887 73 21ms 11 Jul 2024 647th jipsong 🇩🇪 887 73 22ms 23 Jul 2024 647th mattyhempstead 887 73 21ms 6 Oct 2024 647th wh3n3v3r 🇨🇿 887 73 28ms 18 Nov 2024 647th klixel 🇨🇦 887 73 20ms 18 Nov 2024 647th tjwrenn 887 73 22ms 10 Dec 2024 647th nullie 887 73 24ms 19 Dec 2024 647th maxgodfrey2004 🇨🇦 887 73 33ms 13 Feb 2025 647th lolgeny 887 73 21ms 22 Feb 2025 647th andrewjc2000 887 73 33ms 23 Feb 2025 647th Languag3 887 73 21ms 27 Feb 2025 647th Bulmenisaurus 887 73 24ms 2 Mar 2025 647th souta-1326 887 73 20ms 1 Apr 2025 647th BenjaminHGong 887 73 22ms 26 May 2025 647th FEZfan 🇦🇺 887 73 20ms 11 Jul 2025 647th wuduculfre 887 73 23ms 28 Jul 2025 647th BREMAUCY 🇫🇷 887 73 24ms 24 Aug 2025 647th FortuiteMan 🇫🇷 887 73 22ms 28 Sep 2025 647th miaoaixuan 887 73 23ms 30 Sep 2025 706th albanian-laundromat 887 94 339ms 24 Sep 2025 706th kmathis22 887 94 340ms 14 Oct 2025 706th jkelly467 887 94 339ms 21 days ago 706th HumanoidCPU 887 94 337ms 5 days ago 710th Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 710th Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 712th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 713th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 713th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 713th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 713th Ripick 886 90 439ms 27 Nov 2024 717th m-tkach 🇺🇦 886 112 69ms 22 Jun 2025 718th GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 718th emplv 🇱🇻 885 71 3ms 5 May 2022 718th JayXon 🇺🇸 885 71 2ms 7 May 2022 718th nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 718th stefangimmillaro 885 71 2ms 2 Jun 2023 718th 09cf 885 71 2ms 4 Oct 2023 718th kkoenig 885 71 3ms 21 Dec 2023 718th sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 718th masinag 🇮🇹 885 71 2ms 6 Oct 2024 727th SiestaGuru 885 88 325ms 9 Jan 2023 727th rifatx 885 88 312ms 5 Jul 2024 727th kmathis22 885 88 349ms 25 Sep 2025 727th arcpolaris 885 88 297ms 5 days ago 731st m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 731st GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 733rd steffan-polygolf 884 74 130ms 14 Feb 2024 734th kg583 🇺🇸 884 84 17ms 30 Jul 2025 735th nipzu 884 94 136ms 17 May 2022 735th Natanaelel 🇸🇪 884 94 136ms 17 Jun 2022 735th nkoppel 884 94 149ms 19 Oct 2022 735th ovs-code 🇩🇪 884 94 151ms 21 Jun 2023 735th mousetail 🇳🇱 884 94 142ms 12 Jan 2024 740th MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 740th edsrzf 🇳🇿 884 110 247ms 28 Nov 2024 740th targrik 884 110 248ms 30 Jun 2025 743rd Irratix 🇳🇱 883 96 53ms 4 May 2022 743rd MeWhenI 🇻🇦 883 96 56ms 1 Jun 2022 743rd janbehrens 🇩🇪 883 96 54ms 21 Apr 2023 743rd Shanethegamer 🇺🇸 883 96 56ms 15 May 2023 743rd Yewzir 🇧🇪 883 96 57ms 11 Nov 2023 743rd MateuszPietrzak 🇵🇱 883 96 56ms 18 Nov 2023 743rd kkoenig 883 96 55ms 21 Dec 2023 743rd BlankSpruce 883 96 56ms 20 Aug 2024 First Prev 676–750 of 3,457 Next Last
