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 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 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 901st Irratix 🇳🇱 883 96 53ms 4 May 2022 901st MeWhenI 🇻🇦 883 96 56ms 1 Jun 2022 901st janbehrens 🇩🇪 883 96 54ms 21 Apr 2023 901st Shanethegamer 🇺🇸 883 96 56ms 15 May 2023 901st Yewzir 🇧🇪 883 96 57ms 11 Nov 2023 901st MateuszPietrzak 🇵🇱 883 96 56ms 18 Nov 2023 901st kkoenig 883 96 55ms 21 Dec 2023 901st BlankSpruce 883 96 58ms 20 Aug 2024 901st fuzzylojik-golf 🇺🇸 883 96 63ms 14 Jun 2025 910th Shanethegamer 🇺🇸 882 51 405ms 15 May 2023 911th GrayJoKing 🇦🇺 882 60 142ms 24 Oct 2024 912th Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 912th DialFrost 🇸🇬 881 73 100ms 3 Jun 2025 912th edsrzf 🇳🇿 881 73 101ms 4 Jul 2025 915th GrayJoKing 🇦🇺 881 84 53ms 19 Jun 2022 915th primo-ppcg 🇹🇭 881 84 48ms 29 Jun 2022 917th johnnythedoggie 880 72 88ms 13 May 2022 917th kaascevich 880 72 81ms 8 Jul 2025 919th Grrisly 879 74 4ms 25 Mar 2024 920th Shanethegamer 🇺🇸 879 142 919ms 27 Mar 2025 920th DialFrost 🇸🇬 879 142 832ms 28 Mar 2025 920th emgordon154 879 142 887ms 10 Apr 2025 923rd primo-ppcg 🇹🇭 879 193 104ms 14 Aug 2025 924th dokutan 878 62 5ms 28 Apr 2025 925th Shanethegamer 🇺🇸 878 66 189ms 4 May 2022 925th scpchicken 🇵🇼 878 66 328ms 5 May 2022 925th sisyphus-ppcg 🇦🇺 878 66 170ms 6 May 2022 925th Natanaelel 🇸🇪 878 66 159ms 15 Jun 2022 925th Z-snails 878 66 339ms 27 Feb 2023 925th Jeremy-Stafford 878 66 333ms 27 Feb 2023 925th alomiF 878 66 367ms 1 Sep 2023 925th btnlq 878 66 144ms 17 Oct 2023 933rd DialFrost 🇸🇬 878 86 49ms 24 Oct 2024 933rd stefangimmillaro 878 86 49ms 14 Jan 2025 935th c0d3-4-F00d 🇩🇪 877 61 11ms 6 May 2022 935th jackkav 877 61 11ms 26 Jun 2022 935th TechNolaByte 877 61 11ms 6 Jul 2022 935th Heathcorp 🇦🇺 877 61 10ms 17 Jul 2022 935th C0de5mith 🇺🇸 877 61 11ms 3 Aug 2022 935th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 935th moikaturns 🇬🇧 877 61 14ms 25 Sep 2022 935th FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 935th Mazn3k 877 61 10ms 1 Feb 2023 935th tvcv901 877 61 11ms 22 Mar 2023 935th unfinishedprogram 877 61 11ms 19 Jul 2023 935th snoozingnewt 🇺🇸 877 61 11ms 23 Sep 2023 935th funnyboy-roks 877 61 10ms 9 May 2024 935th bac0id 877 61 9ms 29 Jun 2024 935th madex 🇩🇪 877 61 11ms 9 Jul 2024 935th FortuiteMan 🇫🇷 877 61 10ms 10 Oct 2024 935th RobertHoeh 877 61 11ms 5 Apr 2025 935th LvLError 877 61 11ms 29 May 2025 935th Lv0Sys 🇵🇱 877 61 12ms 30 May 2025 935th miles-evan 877 61 13ms 5 Aug 2025 935th alexsave 877 61 12ms 24 days ago 956th guilhem-roy 🇫🇷 877 76 25ms 5 May 2022 956th NewDefectus 🇮🇱 877 76 22ms 6 May 2022 956th CuboidRaptor 🇨🇦 877 76 24ms 25 May 2022 956th TheSmilingTurtle 877 76 27ms 5 Jun 2022 956th Romain-1 🇫🇷 877 76 19ms 8 Jun 2022 956th jhpaques 🇫🇷 877 76 23ms 30 Jul 2022 956th chriscianfarani 877 76 22ms 10 Aug 2022 956th eshilo-draper 877 76 28ms 13 Sep 2022 956th suwat513 877 76 20ms 22 Sep 2022 956th Jaydosu 877 76 23ms 14 Nov 2022 956th tails618 877 76 28ms 2 Dec 2022 956th KevinLyvers 877 76 22ms 17 Dec 2022 956th nayakrujul 877 76 21ms 3 Jan 2023 956th CheeseCake628 🇳🇴 877 76 22ms 8 Jan 2023 956th CatsAreFluffy 877 76 25ms 18 Feb 2023 956th adamnielson42 🇺🇸 877 76 20ms 1 Mar 2023 956th Schreipfelerer 877 76 28ms 9 Apr 2023 956th hm5822 877 76 27ms 22 Apr 2023 956th celiendonze 🇨🇭 877 76 26ms 5 Jul 2023 956th brochmann 🇸🇪 877 76 22ms 13 Aug 2023 First Prev 901–975 of 3,425 Next Last