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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 451st MeWhenI 🇻🇦 897 71 20 Aug 2024 452nd m-tkach 🇺🇦 897 72 16 Oct 2022 452nd GrayJoKing 🇦🇺 897 72 22 Oct 2022 452nd emplv 🇱🇻 897 72 27 Oct 2022 452nd sean-niemann 🇺🇸 897 72 7 Mar 2025 456th edsrzf 🇳🇿 895 83 14 Jan 2025 456th kg583 🇺🇸 895 83 14 Feb 2025 458th Lydxn 🇨🇦 894 69 12 Sep 2022 458th GrayJoKing 🇦🇺 894 69 12 Sep 2022 458th btnlq 894 69 24 Sep 2022 458th trinityy-7 894 69 10 days ago 462nd Steffan153 🇫🇮 894 82 1 Apr 2023 462nd sean-niemann 🇺🇸 894 82 12 Jul 2024 464th emplv 🇱🇻 894 110 5 May 2022 464th Shanethegamer 🇺🇸 894 110 21 Nov 2023 464th edsrzf 🇳🇿 894 110 28 Nov 2024 464th targrik 894 110 30 Jun 2025 468th SiestaGuru 893 131 9 Jan 2023 468th HumanoidCPU 893 131 7 May 2024 470th SirBogman 🇺🇸 892 50 5 May 2022 470th nwellnhof 🇩🇪 892 50 3 Jun 2022 470th Lydxn 🇨🇦 892 50 15 Aug 2022 470th Steffan153 🇫🇮 892 50 9 Aug 2024 474th JayXon 🇺🇸 892 149 21 May 2024 475th MichalMarsalek 🇨🇿 891 87 5 May 2022 475th Kloppermand 🇩🇰 891 87 7 Oct 2022 475th bwat2 891 87 6 Apr 2023 478th GrayJoKing 🇦🇺 890 91 19 Jan 2023 479th pabloferz 889 48 6 Mar 2024 480th Ripick 889 73 8 May 2023 481st edsrzf 🇳🇿 889 78 26 Oct 2024 482nd oeb25 889 93 16 May 2022 482nd snobee 🇨🇦 889 93 8 Dec 2022 482nd logvp 889 93 2 Jan 2024 482nd elgan65536 889 93 5 Mar 2024 482nd smartiel 889 93 12 Aug 2024 482nd trist224 🇫🇷 889 93 12 Aug 2024 482nd nullie 889 93 19 Dec 2024 482nd lolgeny 889 93 22 Feb 2025 490th GolfingSuccess 🇬🇷 889 95 5 May 2022 490th Alex-x90 🇺🇸 889 95 4 Dec 2022 490th Mandrzejy 🇵🇱 889 95 22 Mar 2024 493rd KatieLG 🇬🇧 888 60 4 May 2022 493rd ScottHamper 888 60 5 May 2022 493rd Re-Adventures 🇮🇳 888 60 5 May 2022 493rd 0x24a537r9 888 60 29 Jul 2022 493rd stefangabos 🇷🇴 888 60 19 Aug 2022 493rd eranws 888 60 10 Sep 2022 493rd GeorgeStechman 🇬🇧 888 60 26 Sep 2022 493rd BloodStormKnight 888 60 15 Oct 2022 493rd dzshn 888 60 3 Dec 2022 493rd biocommando 🇫🇮 888 60 20 Dec 2022 493rd Betuaredead 888 60 5 Jan 2023 493rd piano-miles 888 60 16 Jan 2023 493rd Yewzir 🇧🇪 888 60 12 Feb 2023 493rd shellbertt 🇨🇦 888 60 26 Feb 2023 493rd zakariamouhid 888 60 20 May 2023 493rd raphaelimahorn 888 60 23 Aug 2023 493rd jbt 888 60 25 Dec 2023 493rd olleicua 🇺🇸 888 60 15 Feb 2024 493rd HumanoidCPU 888 60 3 May 2024 493rd dokutan 888 60 13 Aug 2024 493rd LostSyntax21 🇬🇧 888 60 10 Sep 2024 493rd xyangst 888 60 28 Sep 2024 493rd a6166231 🇨🇳 888 60 15 May 2025 493rd Protothor 888 60 8 Jul 2025 493rd SebassNoob 888 60 12 days ago 518th Steffan153 🇫🇮 888 80 15 Nov 2022 518th error256 888 80 8 Apr 2025 520th P-Quentin 🇫🇷 887 63 3 Aug 2022 520th kaptsanovb 887 63 20 Apr 2023 520th fkantelberg 887 63 14 Jul 2023 520th snoozingnewt 🇺🇸 887 63 10 Sep 2023 520th VictorStenvers 🇳🇱 887 63 13 Nov 2023 520th 1231234md5 🇨🇳 887 63 14 Dec 2023 Prev 451–525 of 3,248 Next