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 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 Continued Fractions Crossword 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 Continued Fractions Crossword 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 Chars Time Submitted 297th Steffan153 🇫🇮 915 71 120ms 9 Mar 2023 297th Shanethegamer 🇺🇸 915 71 128ms 15 May 2023 297th MeWhenI 🇻🇦 915 71 121ms 8 Aug 2023 297th sean-niemann 🇺🇸 915 71 126ms 9 Jan 2025 305th Steffan153 🇫🇮 915 76 11ms 15 May 2023 305th primo-ppcg 🇹🇭 915 76 18ms 15 May 2023 305th Lydxn 🇨🇦 915 76 8ms 22 May 2023 305th GrayJoKing 🇦🇺 915 76 12ms 24 Aug 2023 309th edsrzf 🇳🇿 914 54 796ms 13 Sep 2025 309th CaedenHarper 🇨🇦 914 54 817ms 27 Sep 2025 309th sean-niemann 🇺🇸 914 54 818ms 27 Sep 2025 309th albanian-laundromat 914 54 859ms 9 days ago 309th xsot 🇸🇬 914 54 811ms 8 days ago 314th xnor-gate 914 63 194ms 20 Jan 2025 315th arctouch-cristiannevianna 913 85 321ms 3 Apr 2023 315th Widgitty 913 85 326ms 1 Sep 2023 315th tomtheisen 🇺🇸 913 85 344ms 10 Apr 2025 318th kmathis22 913 91 354ms 3 days ago 319th Steffan153 🇫🇮 912 71 6ms 10 Dec 2022 319th synt7x 🇺🇸 912 71 4ms 7 Jul 2025 321st pardouin 🇫🇷 912 72 3,105ms 21 May 2025 322nd edsrzf 🇳🇿 912 78 21ms 16 Aug 2025 323rd primo-ppcg 🇹🇭 911 61 6ms 6 May 2022 323rd sisyphus-ppcg 🇦🇺 911 61 9ms 14 Jul 2022 325th Lydxn 🇨🇦 911 70 96ms 7 May 2022 325th JayXon 🇺🇸 911 70 96ms 7 May 2022 327th Steffan153 🇫🇮 911 71 108ms 14 Oct 2022 327th Shanethegamer 🇺🇸 911 71 111ms 15 Oct 2022 327th stefangimmillaro 911 71 103ms 16 Oct 2022 327th MeWhenI 🇻🇦 911 71 102ms 16 Oct 2022 331st annaproxy 911 78 128ms 13 Jan 2023 331st IanUtley 911 78 119ms 12 Nov 2023 331st GrayJoKing 🇦🇺 911 78 84ms 28 Nov 2023 334th Shanethegamer 🇺🇸 911 86 390ms 15 May 2023 334th JayXon 🇺🇸 911 86 508ms 15 May 2023 334th Steffan153 🇫🇮 911 86 389ms 16 May 2023 334th Lydxn 🇨🇦 911 86 465ms 16 May 2023 334th GrayJoKing 🇦🇺 911 86 400ms 11 Aug 2023 334th sean-niemann 🇺🇸 911 86 458ms 11 Jul 2024 340th Bubbler-4 910 33 2,611ms 6 May 2022 340th rak1507 🇬🇧 910 33 112ms 8 May 2022 340th ngn 🇧🇬 910 33 25ms 11 May 2022 340th zacjl 910 33 33ms 3 Jun 2025 340th GrayJoKing 🇦🇺 910 33 15ms 4 Jun 2025 340th HPWiz 🇳🇿 910 33 9ms 7 days ago 346th andersk 🇺🇸 910 91 120ms 25 Oct 2022 346th Super-Pizza 🇨🇦 910 91 127ms 4 Dec 2022 346th klixel 🇨🇦 910 91 121ms 20 May 2023 346th lynn 910 91 127ms 6 Jul 2024 346th edsrzf 🇳🇿 910 91 124ms 29 Nov 2024 346th DialFrost 🇸🇬 910 91 122ms 7 Apr 2025 352nd Lydxn 🇨🇦 909 47 256ms 5 May 2022 353rd JayXon 🇺🇸 909 53 443ms 17 Aug 2024 354th tailorspy 909 93 53ms 27 May 2024 354th sean-niemann 🇺🇸 909 93 77ms 9 Jun 2025 354th KasperKivimaeki 🇫🇮 909 93 57ms 26 Oct 2025 357th ovs-code 🇩🇪 908 75 74ms 12 Sep 2024 357th Kacarott 🇦🇺 908 75 78ms 13 Sep 2024 359th Lydxn 🇨🇦 908 81 45ms 1 Apr 2023 360th Shanethegamer 🇺🇸 907 61 3ms 9 Oct 2023 360th edsrzf 🇳🇿 907 61 4ms 4 Jul 2025 362nd nai62 907 68 8ms 27 Aug 2022 363rd GrayJoKing 🇦🇺 907 74 64ms 1 Nov 2023 364th lynn 907 78 1,328ms 5 May 2022 365th ovs-code 🇩🇪 905 67 92ms 13 Dec 2022 365th Steffan153 🇫🇮 905 67 99ms 18 Dec 2022 365th Lydxn 🇨🇦 905 67 105ms 4 Feb 2023 365th DialFrost 🇸🇬 905 67 90ms 17 Mar 2025 369th primo-ppcg 🇹🇭 905 93 42ms 7 May 2022 369th AlephSquirrel 905 93 30ms 21 Jan 2023 369th kg583 🇺🇸 905 93 29ms 26 Dec 2024 369th CLOStrophobic 🇮🇹 905 93 31ms 17 Jan 2025 369th edsrzf 🇳🇿 905 93 30ms 3 Jul 2025 374th Lydxn 🇨🇦 905 107 260ms 6 May 2022 374th CaedenHarper 🇨🇦 905 107 256ms 5 Oct 2025 First Prev 301–375 of 3,460 Next Last