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 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 🇻🇦 894 71 20 Aug 2024 452nd emplv 🇱🇻 894 110 5 May 2022 452nd Shanethegamer 🇺🇸 894 110 21 Nov 2023 452nd edsrzf 🇳🇿 894 110 28 Nov 2024 452nd targrik 894 110 3 days ago 456th Lydxn 🇨🇦 893 69 12 Sep 2022 456th GrayJoKing 🇦🇺 893 69 12 Sep 2022 456th btnlq 893 69 24 Sep 2022 459th Steffan153 🇫🇮 893 82 1 Apr 2023 459th sean-niemann 🇺🇸 893 82 12 Jul 2024 461st edsrzf 🇳🇿 893 83 14 Jan 2025 461st kg583 🇺🇸 893 83 14 Feb 2025 463rd SiestaGuru 892 131 9 Jan 2023 463rd HumanoidCPU 892 131 7 May 2024 465th SirBogman 🇺🇸 891 50 5 May 2022 465th nwellnhof 🇩🇪 891 50 3 Jun 2022 465th Lydxn 🇨🇦 891 50 15 Aug 2022 465th Steffan153 🇫🇮 891 50 9 Aug 2024 469th MichalMarsalek 🇨🇿 891 87 5 May 2022 469th Kloppermand 🇩🇰 891 87 7 Oct 2022 469th bwat2 891 87 6 Apr 2023 472nd pabloferz 889 48 6 Mar 2024 473rd edsrzf 🇳🇿 889 78 26 Oct 2024 474th oeb25 889 93 16 May 2022 474th snobee 🇨🇦 889 93 8 Dec 2022 474th logvp 889 93 2 Jan 2024 474th elgan65536 889 93 5 Mar 2024 474th smartiel 889 93 12 Aug 2024 474th trist224 🇫🇷 889 93 12 Aug 2024 474th nullie 889 93 19 Dec 2024 474th lolgeny 889 93 22 Feb 2025 482nd JayXon 🇺🇸 889 149 21 May 2024 483rd Ripick 888 73 8 May 2023 484th GolfingSuccess 🇬🇷 888 95 5 May 2022 484th Alex-x90 🇺🇸 888 95 4 Dec 2022 484th Mandrzejy 🇵🇱 888 95 22 Mar 2024 487th KatieLG 🇬🇧 887 60 4 May 2022 487th ScottHamper 887 60 5 May 2022 487th Re-Adventures 🇮🇳 887 60 5 May 2022 487th 0x24a537r9 887 60 29 Jul 2022 487th stefangabos 🇷🇴 887 60 19 Aug 2022 487th eranws 887 60 10 Sep 2022 487th GeorgeStechman 🇬🇧 887 60 26 Sep 2022 487th BloodStormKnight 887 60 15 Oct 2022 487th dzshn 887 60 3 Dec 2022 487th biocommando 🇫🇮 887 60 20 Dec 2022 487th Betuaredead 887 60 5 Jan 2023 487th piano-miles 887 60 16 Jan 2023 487th Yewzir 🇧🇪 887 60 12 Feb 2023 487th shellbertt 🇨🇦 887 60 26 Feb 2023 487th zakariamouhid 887 60 20 May 2023 487th raphaelimahorn 887 60 23 Aug 2023 487th jbt 887 60 25 Dec 2023 487th olleicua 🇺🇸 887 60 15 Feb 2024 487th HumanoidCPU 887 60 3 May 2024 487th dokutan 887 60 13 Aug 2024 487th LostSyntax21 🇬🇧 887 60 10 Sep 2024 487th xyangst 887 60 28 Sep 2024 487th a6166231 🇨🇳 887 60 15 May 2025 510th GrayJoKing 🇦🇺 887 91 19 Jan 2023 511th P-Quentin 🇫🇷 886 63 3 Aug 2022 511th kaptsanovb 886 63 20 Apr 2023 511th fkantelberg 886 63 14 Jul 2023 511th snoozingnewt 🇺🇸 886 63 10 Sep 2023 511th VictorStenvers 🇳🇱 886 63 13 Nov 2023 511th 1231234md5 🇨🇳 886 63 14 Dec 2023 511th f-tucker 886 63 6 Feb 2024 511th JunkIce 886 63 24 Nov 2024 511th Kowalskiexe 🇵🇱 886 63 19 Apr 2025 511th 123mjb 886 63 2 Jun 2025 521st Steffan153 🇫🇮 886 80 15 Nov 2022 521st error256 886 80 8 Apr 2025 523rd nwellnhof 🇩🇪 886 111 4 May 2022 523rd stefangimmillaro 886 111 26 Sep 2023 523rd kkoenig 886 111 4 Jan 2024 Prev 451–525 of 3,146 Next