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 448th Blendi-Goose 899 72 6ms 16 Mar 2025 448th edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 448th sean-niemann 🇺🇸 899 72 6ms 16 Oct 2025 454th michael-pruglo 🇺🇦 899 94 52ms 5 Jul 2022 454th zygoloid 899 94 51ms 5 Aug 2024 456th shinh 898 52 42ms 29 Jun 2022 456th MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 458th Lydxn 🇨🇦 898 70 88ms 7 May 2022 459th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 460th m-tkach 🇺🇦 898 72 104ms 16 Oct 2022 460th GrayJoKing 🇦🇺 898 72 116ms 22 Oct 2022 460th emplv 🇱🇻 898 72 105ms 27 Oct 2022 460th sean-niemann 🇺🇸 898 72 132ms 7 Mar 2025 464th Steffan153 🇫🇮 897 82 44ms 1 Apr 2023 464th sean-niemann 🇺🇸 897 82 43ms 12 Jul 2024 466th sean-niemann 🇺🇸 896 108 261ms 25 May 2024 466th GolfingSuccess 🇬🇷 896 108 252ms 6 Sep 2025 468th Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 468th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 468th btnlq 895 69 7ms 24 Sep 2022 471st trinityy-7 894 69 2ms 7 Aug 2025 472nd SirBogman 🇺🇸 892 50 407ms 5 May 2022 472nd nwellnhof 🇩🇪 892 50 402ms 3 Jun 2022 472nd Lydxn 🇨🇦 892 50 413ms 15 Aug 2022 472nd Steffan153 🇫🇮 892 50 390ms 9 Aug 2024 476th edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 476th kg583 🇺🇸 892 78 11ms 25 Sep 2025 478th MichalMarsalek 🇨🇿 892 87 324ms 5 May 2022 478th Kloppermand 🇩🇰 892 87 326ms 7 Oct 2022 478th bwat2 892 87 317ms 6 Apr 2023 481st GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 482nd Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 483rd oeb25 891 93 128ms 16 May 2022 483rd snobee 🇨🇦 891 93 130ms 8 Dec 2022 483rd logvp 891 93 123ms 2 Jan 2024 483rd elgan65536 891 93 124ms 5 Mar 2024 483rd smartiel 891 93 120ms 12 Aug 2024 483rd trist224 🇫🇷 891 93 126ms 12 Aug 2024 483rd nullie 891 93 126ms 19 Dec 2024 483rd lolgeny 891 93 126ms 22 Feb 2025 491st p-zubieta 890 48 259ms 6 Mar 2024 492nd Ripick 890 73 121ms 8 May 2023 493rd Steffan153 🇫🇮 890 80 26ms 11 Dec 2023 494th GolfingSuccess 🇬🇷 890 95 54ms 5 May 2022 494th Alex-x90 🇺🇸 890 95 53ms 4 Dec 2022 494th Mandrzejy 🇵🇱 890 95 53ms 22 Mar 2024 497th Steffan153 🇫🇮 889 80 40ms 15 Nov 2022 497th error256 889 80 130ms 8 Apr 2025 499th KatieLG 🇬🇧 888 60 11ms 4 May 2022 499th ScottHamper 888 60 10ms 5 May 2022 499th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 499th 0x24a537r9 888 60 10ms 29 Jul 2022 499th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 499th eranws 888 60 11ms 10 Sep 2022 499th GeorgeStechman 🇬🇧 888 60 11ms 26 Sep 2022 499th BloodStormKnight 888 60 10ms 15 Oct 2022 499th dzshn 888 60 14ms 3 Dec 2022 499th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 499th Betuaredead 888 60 10ms 5 Jan 2023 499th piano-miles 888 60 10ms 16 Jan 2023 499th Yewzir 🇧🇪 888 60 13ms 12 Feb 2023 499th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 499th zakariamouhid 888 60 10ms 20 May 2023 499th raphaelimahorn 888 60 10ms 23 Aug 2023 499th jbt 888 60 13ms 25 Dec 2023 499th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 499th HumanoidCPU 888 60 12ms 3 May 2024 499th dokutan 888 60 10ms 13 Aug 2024 499th LostSyntax21 🇬🇧 888 60 10ms 10 Sep 2024 499th xyangst 888 60 10ms 28 Sep 2024 499th a6166231 🇨🇳 888 60 9ms 15 May 2025 499th Protothor 888 60 11ms 8 Jul 2025 499th SebassNoob 888 60 10ms 5 Aug 2025 499th Yax42 🇫🇷 888 60 10ms 5 Sep 2025 499th levinwinter 888 60 12ms 22 Oct 2025 First Prev 451–525 of 3,460 Next Last