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 900th MeWhenI 🇻🇦 883 96 61ms 1 Jun 2022 900th janbehrens 🇩🇪 883 96 65ms 21 Apr 2023 900th Shanethegamer 🇺🇸 883 96 66ms 15 May 2023 900th Yewzir 🇧🇪 883 96 72ms 11 Nov 2023 900th MateuszPietrzak 🇵🇱 883 96 63ms 18 Nov 2023 900th kkoenig 883 96 63ms 21 Dec 2023 900th BlankSpruce 883 96 63ms 20 Aug 2024 900th fuzzylojik-golf 🇺🇸 883 96 70ms 14 Jun 2025 909th Shanethegamer 🇺🇸 882 51 405ms 15 May 2023 910th GrayJoKing 🇦🇺 882 60 142ms 24 Oct 2024 911th Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 911th DialFrost 🇸🇬 881 73 100ms 3 Jun 2025 911th edsrzf 🇳🇿 881 73 101ms 4 Jul 2025 914th GrayJoKing 🇦🇺 881 84 53ms 19 Jun 2022 914th primo-ppcg 🇹🇭 881 84 48ms 29 Jun 2022 916th johnnythedoggie 880 72 103ms 13 May 2022 916th kaascevich 880 72 109ms 8 Jul 2025 918th Grrisly 879 74 4ms 25 Mar 2024 919th Shanethegamer 🇺🇸 879 142 919ms 27 Mar 2025 919th DialFrost 🇸🇬 879 142 832ms 28 Mar 2025 919th emgordon154 879 142 887ms 10 Apr 2025 922nd primo-ppcg 🇹🇭 879 193 104ms 14 Aug 2025 923rd dokutan 878 62 5ms 28 Apr 2025 924th Shanethegamer 🇺🇸 878 66 189ms 4 May 2022 924th scpchicken 🇵🇼 878 66 328ms 5 May 2022 924th sisyphus-ppcg 🇦🇺 878 66 170ms 6 May 2022 924th Natanaelel 🇸🇪 878 66 159ms 15 Jun 2022 924th Z-snails 878 66 339ms 27 Feb 2023 924th Jeremy-Stafford 878 66 333ms 27 Feb 2023 924th alomiF 878 66 367ms 1 Sep 2023 924th btnlq 878 66 144ms 17 Oct 2023 932nd DialFrost 🇸🇬 878 86 49ms 24 Oct 2024 932nd stefangimmillaro 878 86 49ms 14 Jan 2025 934th c0d3-4-F00d 🇩🇪 877 61 11ms 6 May 2022 934th jackkav 877 61 11ms 26 Jun 2022 934th TechNolaByte 877 61 11ms 6 Jul 2022 934th Heathcorp 🇦🇺 877 61 10ms 17 Jul 2022 934th C0de5mith 🇺🇸 877 61 11ms 3 Aug 2022 934th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 934th moikaturns 🇬🇧 877 61 14ms 25 Sep 2022 934th FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 934th Mazn3k 877 61 10ms 1 Feb 2023 934th tvcv901 877 61 11ms 22 Mar 2023 934th unfinishedprogram 877 61 11ms 19 Jul 2023 934th snoozingnewt 🇺🇸 877 61 11ms 23 Sep 2023 934th funnyboy-roks 877 61 10ms 9 May 2024 934th bac0id 877 61 9ms 29 Jun 2024 934th madex 🇩🇪 877 61 11ms 9 Jul 2024 934th FortuiteMan 🇫🇷 877 61 10ms 10 Oct 2024 934th RobertHoeh 877 61 11ms 5 Apr 2025 934th LvLError 877 61 11ms 29 May 2025 934th Lv0Sys 🇵🇱 877 61 12ms 30 May 2025 934th miles-evan 877 61 13ms 5 Aug 2025 934th alexsave 877 61 12ms 23 days ago 955th guilhem-roy 🇫🇷 877 76 25ms 5 May 2022 955th NewDefectus 🇮🇱 877 76 22ms 6 May 2022 955th CuboidRaptor 🇨🇦 877 76 24ms 25 May 2022 955th TheSmilingTurtle 877 76 27ms 5 Jun 2022 955th Romain-1 🇫🇷 877 76 19ms 8 Jun 2022 955th jhpaques 🇫🇷 877 76 23ms 30 Jul 2022 955th chriscianfarani 877 76 22ms 10 Aug 2022 955th eshilo-draper 877 76 28ms 13 Sep 2022 955th suwat513 877 76 20ms 22 Sep 2022 955th Jaydosu 877 76 23ms 14 Nov 2022 955th tails618 877 76 28ms 2 Dec 2022 955th KevinLyvers 877 76 22ms 17 Dec 2022 955th nayakrujul 877 76 21ms 3 Jan 2023 955th CheeseCake628 🇳🇴 877 76 22ms 8 Jan 2023 955th CatsAreFluffy 877 76 25ms 18 Feb 2023 955th adamnielson42 🇺🇸 877 76 20ms 1 Mar 2023 955th Schreipfelerer 877 76 28ms 9 Apr 2023 955th hm5822 877 76 27ms 22 Apr 2023 955th celiendonze 🇨🇭 877 76 26ms 5 Jul 2023 955th brochmann 🇸🇪 877 76 22ms 13 Aug 2023 955th Command-Master 877 76 36ms 2 Oct 2023 First Prev 901–975 of 3,424 Next Last
