Collatz in all languages in chars. 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 Chars Time 226th Lydxn 🇨🇦 923 70 17 Oct 2022 226th JayXon 🇺🇸 923 70 17 Oct 2022 228th roavin 923 84 23 Jun 2022 228th tkr-sh 🇫🇷 923 84 20 Aug 2022 228th Nickmiste 923 84 9 Nov 2022 228th postie77 923 84 19 May 2023 228th ertz1ertz 923 84 13 Sep 2024 228th Grabnukebomb 923 84 13 Sep 2024 228th Shanethegamer 🇺🇸 923 84 9 Apr 2025 228th HumanoidCPU 923 84 10 Apr 2025 228th annaproxy 923 84 11 Apr 2025 228th Re-Adventures 🇮🇳 923 84 15 Apr 2025 228th janbehrens 🇩🇪 923 84 17 Apr 2025 239th ovs-code 🇩🇪 922 60 9 Oct 2023 239th GrayJoKing 🇦🇺 922 60 11 Oct 2023 239th Lydxn 🇨🇦 922 60 11 Oct 2023 239th GolfingSuccess 🇬🇷 922 60 16 Nov 2023 239th Steffan153 🇫🇮 922 60 28 Jan 2024 239th JayXon 🇺🇸 922 60 29 Jan 2024 239th rucin93 🇵🇱 922 60 10 Jul 2024 239th sean-niemann 🇺🇸 922 60 10 Jul 2024 247th Steffan153 🇫🇮 922 67 19 Aug 2024 247th JayXon 🇺🇸 922 67 19 Aug 2024 249th JayXon 🇺🇸 922 105 34 hours ago 249th KasperKivimaeki 🇫🇮 922 105 30 hours ago 251st Lydxn 🇨🇦 920 90 6 May 2022 251st kumavale 920 90 3 Sep 2025 253rd sisyphus-ppcg 🇦🇺 919 50 31 Jan 2023 253rd saito-ta 🇯🇵 919 50 12 Dec 2024 255th uiamn 919 58 6 Sep 2022 255th 5quiwyrm 919 58 29 Sep 2022 255th alasdair-greenland 919 58 13 Jan 2023 255th kirjavascript 919 58 4 Aug 2025 255th Posandu 919 58 26 Aug 2025 255th mrxz 🇳🇱 919 58 3 Sep 2025 261st sean-niemann 🇺🇸 919 66 29 May 2025 262nd Herbert00709 🇵🇱 918 92 17 Nov 2023 262nd 4QT0R 918 92 23 Nov 2023 262nd ovs-code 🇩🇪 918 92 3 Jun 2024 265th primo-ppcg 🇹🇭 917 24 10 Dec 2022 266th nwellnhof 🇩🇪 916 51 4 May 2022 266th primo-ppcg 🇹🇭 916 51 6 May 2022 266th janlelis 916 51 10 May 2022 266th Natanaelel 🇸🇪 916 51 2 Jun 2022 270th Irratix 🇳🇱 916 61 7 May 2022 270th TFeld00 🇩🇰 916 61 17 May 2022 270th hallvabo 🇳🇴 916 61 4 Sep 2022 270th DialFrost 🇸🇬 916 61 19 Dec 2022 270th anter69 🇭🇺 916 61 19 Dec 2022 270th Alex-x90 🇺🇸 916 61 27 Dec 2022 270th commandblockguy 🇺🇸 916 61 22 Aug 2023 270th fgrosshans 🇫🇷 916 61 22 Jul 2024 270th duckyluuk 🇳🇱 916 61 15 Aug 2024 270th rucin93 🇵🇱 916 61 31 May 2025 270th katss2 916 61 17 Aug 2025 281st btnlq 915 59 6 Nov 2022 282nd JayXon 🇺🇸 915 69 5 Apr 2023 282nd Lydxn 🇨🇦 915 69 9 Apr 2023 284th xnor-gate 914 63 20 Jan 2025 285th MichalMarsalek 🇨🇿 914 71 5 May 2022 285th Lydxn 🇨🇦 914 71 7 May 2022 285th GrayJoKing 🇦🇺 914 71 8 May 2022 285th JayXon 🇺🇸 914 71 8 May 2022 285th Steffan153 🇫🇮 914 71 9 Mar 2023 285th Shanethegamer 🇺🇸 914 71 15 May 2023 285th MeWhenI 🇻🇦 914 71 8 Aug 2023 285th sean-niemann 🇺🇸 914 71 9 Jan 2025 293rd Steffan153 🇫🇮 914 76 15 May 2023 293rd primo-ppcg 🇹🇭 914 76 15 May 2023 293rd Lydxn 🇨🇦 914 76 22 May 2023 293rd GrayJoKing 🇦🇺 914 76 24 Aug 2023 297th arctouch-cristiannevianna 912 85 3 Apr 2023 297th Widgitty 912 85 1 Sep 2023 297th tomtheisen 🇺🇸 912 85 10 Apr 2025 300th CaedenHarper 🇨🇦 912 91 39 hours ago First Prev 226–300 of 3,353 Next Last