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 65th lynn 963 27 16 Oct 2023 65th emgordon154 963 27 13 Sep 2024 78th Lydxn 🇨🇦 960 49 4 May 2022 78th JayXon 🇺🇸 960 49 17 Oct 2022 78th GrayJoKing 🇦🇺 960 49 15 Nov 2022 78th radarek 🇵🇱 960 49 26 Aug 2025 82nd GrayJoKing 🇦🇺 958 38 5 May 2022 82nd MeWhenI 🇻🇦 958 38 4 Mar 2025 84th antimon2 🇯🇵 957 45 17 Nov 2024 85th DelaneyJM 957 47 7 Apr 2025 85th KevinMarquette 🇺🇸 957 47 7 Apr 2025 85th sean-niemann 🇺🇸 957 47 7 Apr 2025 85th corbob 🇨🇦 957 47 8 Apr 2025 85th jborean93 957 47 9 Apr 2025 85th bitsandbeyond 🇳🇱 957 47 8 Jun 2025 85th DialFrost 🇸🇬 957 47 8 Jun 2025 92nd primo-ppcg 🇹🇭 955 41 5 May 2022 93rd akshatj27 🇦🇶 955 56 4 May 2022 93rd didion0 🇺🇸 955 56 5 May 2022 93rd NewDefectus 🇮🇱 955 56 6 May 2022 93rd lynn 955 56 6 May 2022 93rd uttumuttu 🇫🇮 955 56 24 May 2022 93rd jared-hughes 955 56 6 Jul 2022 93rd 051 🇸🇬 955 56 8 Aug 2022 93rd BambooleanLogic 🇸🇪 955 56 12 Oct 2022 93rd makinde 955 56 21 Oct 2022 93rd DialFrost 🇸🇬 955 56 14 Nov 2022 93rd AlephSquirrel 955 56 15 Feb 2023 93rd dmrichwa 🇺🇸 955 56 10 Jul 2023 93rd tayloia 🇬🇧 955 56 10 Jul 2023 93rd Argeento 🇵🇱 955 56 25 Aug 2023 93rd weliveinhell 🇭🇹 955 56 2 Oct 2023 93rd coreynash 955 56 6 Oct 2023 93rd dylanarmstrong 955 56 10 Dec 2023 93rd two-bad 🇬🇧 955 56 23 Feb 2024 93rd mehbark 955 56 27 Jul 2024 93rd madeforlosers 955 56 4 Nov 2024 93rd XenThe 🇬🇧 955 56 6 Jun 2025 114th 2bular 952 32 17 Oct 2024 115th MichalMarsalek 🇨🇿 952 70 5 May 2022 115th primo-ppcg 🇹🇭 952 70 5 May 2022 115th SirBogman 🇺🇸 952 70 5 May 2022 115th prplz 🇦🇺 952 70 5 May 2022 115th Irratix 🇳🇱 952 70 7 May 2022 115th rak1507 🇬🇧 952 70 7 May 2022 115th inventshah 952 70 9 May 2022 115th k3w1k0d3r 952 70 22 Jun 2022 115th ZakkkkAttackkkk 🇵🇭 952 70 14 Jul 2022 115th Bonjour27891 🇻🇳 952 70 14 Jul 2022 115th OllieBoyne 🇬🇧 952 70 19 Jul 2022 115th bricknellj 952 70 25 Jul 2022 115th wen1now 952 70 8 Aug 2022 115th 051 🇸🇬 952 70 8 Aug 2022 115th Sp3000 🇦🇺 952 70 8 Aug 2022 115th betaveros 952 70 9 Aug 2022 115th shelerr 952 70 9 Sep 2022 115th stewSquared 🇺🇸 952 70 27 Sep 2022 115th orthoplex 🇨🇽 952 70 9 Oct 2022 115th 5quiwyrm 952 70 19 Oct 2022 115th myfatemi04 952 70 4 Nov 2022 115th kevinmchung 952 70 4 Nov 2022 115th FlorianCassayre 🇫🇷 952 70 7 Nov 2022 115th fourth-bit 952 70 29 Nov 2022 115th QuincyNash 🇺🇸 952 70 29 Nov 2022 115th aksyristos 952 70 25 Dec 2022 115th thizanne 952 70 27 Dec 2022 115th Alex-x90 🇺🇸 952 70 20 Jan 2023 115th bob-th 952 70 24 Jan 2023 115th SirFireball3521 952 70 25 Jan 2023 115th stefangimmillaro 952 70 6 Feb 2023 115th Seek64 🇩🇪 952 70 7 Feb 2023 115th FieryIceStickie 952 70 3 Apr 2023 115th MeWhenI 🇻🇦 952 70 30 Apr 2023 115th fgrosshans 🇫🇷 952 70 5 May 2023 115th Shanethegamer 🇺🇸 952 70 25 May 2023 Prev 76–150 of 3,360 Next
