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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 226th inventshah 939 57 12ms 4 May 2022 226th itsh01 939 57 13ms 17 May 2022 226th Natanaelel 🇸🇪 939 57 13ms 16 Jun 2022 226th Attero 🇸🇪 939 57 13ms 3 Aug 2022 226th SirFireball3521 939 57 12ms 26 Jan 2023 226th Kacarott 🇦🇺 939 57 11ms 24 Mar 2023 226th nathanadams 🇳🇿 939 57 11ms 24 Apr 2023 226th hacker112 🇸🇪 939 57 11ms 20 Jun 2024 226th thisishowmymindworks 🇳🇴 939 57 10ms 28 Jun 2024 226th Salutations45 939 57 11ms 18 Nov 2024 226th daniel-cardone 939 57 11ms 3 Jul 2025 226th CaedenHarper 🇨🇦 939 57 11ms 24 days ago 226th BrunoVisnadi 🇧🇷 939 57 13ms 30 hours ago 226th Laellekoenig 939 57 11ms 6 hours ago 240th primo-ppcg 🇹🇭 939 58 5ms 13 Nov 2022 240th clockworknazo 939 58 8ms 15 Nov 2022 240th Lydxn 🇨🇦 939 58 5ms 7 Feb 2023 240th xsot 🇸🇬 939 58 6ms 28 Jun 2024 240th Salutations45 939 58 8ms 18 Dec 2024 245th TFeld00 🇩🇰 939 71 25ms 17 May 2022 245th DialFrost 🇸🇬 939 71 27ms 15 Nov 2022 245th StefanHabel 🇨🇦 939 71 19ms 29 Nov 2022 245th nstearns96 🇬🇧 939 71 18ms 11 Jan 2023 245th hallvabo 🇳🇴 939 71 19ms 7 Feb 2023 245th anter69 🇭🇺 939 71 18ms 21 May 2024 245th rucin93 🇵🇱 939 71 18ms 10 Jul 2024 245th lelbal 939 71 32ms 26 Aug 2025 245th HETHAT 🇩🇿 939 71 26ms 23 Sep 2025 254th Irratix 🇳🇱 938 83 409ms 4 May 2022 254th nwellnhof 🇩🇪 938 83 323ms 4 May 2022 254th ScottHamper 938 83 376ms 5 May 2022 254th Romain-1 🇫🇷 938 83 339ms 1 Jun 2022 254th Gaddy 🇫🇷 938 83 426ms 1 Jun 2022 254th 5quiwyrm 938 83 381ms 4 Sep 2022 254th Betuaredead 938 83 426ms 5 Jan 2023 254th Yewzir 🇧🇪 938 83 351ms 12 Feb 2023 254th btnlq 938 83 377ms 9 Mar 2023 254th Adix-null 🇱🇹 938 83 376ms 17 May 2023 254th AdrienHache 🇫🇷 938 83 355ms 8 Jun 2023 254th gblikas 938 83 376ms 23 Jul 2023 254th KrausRaus 🇺🇸 938 83 347ms 31 Jul 2023 254th namelessiw 938 83 329ms 9 Apr 2025 254th dokutan 938 83 420ms 9 Apr 2025 254th m-tkach 🇺🇦 938 83 333ms 10 Apr 2025 254th DialFrost 🇸🇬 938 83 350ms 10 Apr 2025 254th Pecanolith 938 83 353ms 19 Apr 2025 254th Tyrant7 938 83 331ms 19 Apr 2025 254th Yax42 🇫🇷 938 83 374ms 19 Apr 2025 254th MeWhenI 🇻🇦 938 83 352ms 19 Jun 2025 254th sean-niemann 🇺🇸 938 83 358ms 20 Jun 2025 254th stefangimmillaro 938 83 384ms 20 Jun 2025 254th tomh1012 938 83 324ms 28 Aug 2025 254th fuzzylojik-golf 🇺🇸 938 83 346ms 8 Sep 2025 254th CaedenHarper 🇨🇦 938 83 357ms 4 days ago 280th grey0ut 937 48 2,417ms 8 Apr 2025 281st GolfingSuccess 🇬🇷 937 49 40ms 12 Aug 2024 281st Shanethegamer 🇺🇸 937 49 40ms 12 Aug 2024 281st Steffan153 🇫🇮 937 49 40ms 12 Aug 2024 281st MeWhenI 🇻🇦 937 49 46ms 13 Aug 2024 281st DialFrost 🇸🇬 937 49 48ms 13 Aug 2024 281st GrayJoKing 🇦🇺 937 49 68ms 15 Aug 2024 281st btnlq 937 49 64ms 16 Aug 2024 281st emgordon154 937 49 47ms 19 Aug 2024 281st ovs-code 🇩🇪 937 49 43ms 19 Aug 2024 281st mousetail 🇳🇱 937 49 60ms 13 Sep 2024 281st lynn 937 49 43ms 20 Dec 2024 281st weeble 937 49 46ms 20 Dec 2024 281st sean-niemann 🇺🇸 937 49 42ms 11 Jan 2025 294th DialFrost 🇸🇬 936 89 401ms 24 Sep 2025 294th ovs-code 🇩🇪 936 89 584ms 24 Sep 2025 294th dokutan 936 89 439ms 27 days ago 294th sean-niemann 🇺🇸 936 89 391ms 27 days ago 294th Shanethegamer 🇺🇸 936 89 436ms 27 days ago 294th nwellnhof 🇩🇪 936 89 368ms 27 days ago 294th m-tkach 🇺🇦 936 89 491ms 27 days ago First Prev 226–300 of 3,408 Next Last