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 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 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 451st shinh 898 52 42ms 29 Jun 2022 451st MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 453rd Lydxn 🇨🇦 898 70 89ms 7 May 2022 454th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 455th m-tkach 🇺🇦 898 72 104ms 16 Oct 2022 455th GrayJoKing 🇦🇺 898 72 104ms 22 Oct 2022 455th emplv 🇱🇻 898 72 104ms 27 Oct 2022 455th sean-niemann 🇺🇸 898 72 110ms 7 Mar 2025 459th Steffan153 🇫🇮 897 82 44ms 1 Apr 2023 459th sean-niemann 🇺🇸 897 82 43ms 12 Jul 2024 461st sean-niemann 🇺🇸 896 108 261ms 25 May 2024 461st GolfingSuccess 🇬🇷 896 108 252ms 6 Sep 2025 463rd Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 463rd GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 463rd btnlq 895 69 7ms 24 Sep 2022 466th trinityy-7 894 69 2ms 7 Aug 2025 467th SirBogman 🇺🇸 892 50 414ms 5 May 2022 467th nwellnhof 🇩🇪 892 50 429ms 3 Jun 2022 467th Lydxn 🇨🇦 892 50 415ms 15 Aug 2022 467th Steffan153 🇫🇮 892 50 448ms 9 Aug 2024 471st edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 471st kg583 🇺🇸 892 78 11ms 25 Sep 2025 473rd MichalMarsalek 🇨🇿 892 87 334ms 5 May 2022 473rd Kloppermand 🇩🇰 892 87 343ms 7 Oct 2022 473rd bwat2 892 87 321ms 6 Apr 2023 476th GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 477th Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 478th p-zubieta 890 48 267ms 6 Mar 2024 479th Ripick 890 73 121ms 8 May 2023 480th Steffan153 🇫🇮 890 80 26ms 11 Dec 2023 481st oeb25 890 93 152ms 16 May 2022 481st snobee 🇨🇦 890 93 155ms 8 Dec 2022 481st logvp 890 93 130ms 2 Jan 2024 481st elgan65536 890 93 124ms 5 Mar 2024 481st smartiel 890 93 120ms 12 Aug 2024 481st trist224 🇫🇷 890 93 126ms 12 Aug 2024 481st nullie 890 93 126ms 19 Dec 2024 481st lolgeny 890 93 128ms 22 Feb 2025 489th GolfingSuccess 🇬🇷 890 95 54ms 5 May 2022 489th Alex-x90 🇺🇸 890 95 56ms 4 Dec 2022 489th Mandrzejy 🇵🇱 890 95 57ms 22 Mar 2024 492nd Steffan153 🇫🇮 889 80 40ms 15 Nov 2022 492nd error256 889 80 130ms 8 Apr 2025 494th KatieLG 🇬🇧 888 60 13ms 4 May 2022 494th ScottHamper 888 60 10ms 5 May 2022 494th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 494th 0x24a537r9 888 60 10ms 29 Jul 2022 494th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 494th eranws 888 60 10ms 10 Sep 2022 494th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 494th BloodStormKnight 888 60 10ms 15 Oct 2022 494th dzshn 888 60 10ms 3 Dec 2022 494th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 494th Betuaredead 888 60 9ms 5 Jan 2023 494th piano-miles 888 60 10ms 16 Jan 2023 494th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 494th shellbertt 🇨🇦 888 60 11ms 26 Feb 2023 494th zakariamouhid 888 60 10ms 20 May 2023 494th raphaelimahorn 888 60 10ms 23 Aug 2023 494th jbt 888 60 10ms 25 Dec 2023 494th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 494th HumanoidCPU 888 60 9ms 3 May 2024 494th dokutan 888 60 11ms 13 Aug 2024 494th LostSyntax21 🇬🇧 888 60 11ms 10 Sep 2024 494th xyangst 888 60 11ms 28 Sep 2024 494th a6166231 🇨🇳 888 60 9ms 15 May 2025 494th Protothor 888 60 11ms 8 Jul 2025 494th SebassNoob 888 60 10ms 5 Aug 2025 494th Yax42 🇫🇷 888 60 9ms 5 Sep 2025 494th levinwinter 888 60 9ms 23 days ago 521st MeWhenI 🇻🇦 888 109 255ms 9 Feb 2023 522nd m-tkach 🇺🇦 888 117 27ms 7 May 2022 522nd Lydxn 🇨🇦 888 117 28ms 7 May 2022 524th P-Quentin 🇫🇷 887 63 18ms 3 Aug 2022 524th kaptsanovb 887 63 26ms 20 Apr 2023 First Prev 451–525 of 3,440 Next Last