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 751st ovs-code 🇩🇪 859 133 8 Jul 2024 752nd ulucs 858 35 8 May 2022 752nd bstrat 858 35 6 Jun 2024 752nd wh3n3v3r 🇨🇿 858 35 18 Nov 2024 755th Andriamanitra 🇫🇮 858 67 26 Apr 2023 755th GrayJoKing 🇦🇺 858 67 8 Feb 2025 757th Steffan153 🇫🇮 858 78 4 Feb 2023 758th 5quiwyrm 857 52 4 Sep 2022 758th MeWhenI 🇻🇦 857 52 28 Jan 2023 758th Feniske 🇫🇷 857 52 7 Nov 2023 758th dcgjb 857 52 29 Jan 2024 758th JPRuskin 🇬🇧 857 52 7 Apr 2025 758th IISResetMe 857 52 7 Apr 2025 758th Ripick 857 52 1 Jun 2025 765th MeWhenI 🇻🇦 857 145 28 Mar 2025 766th JRaspass 🇬🇧 856 41 4 May 2022 766th SirBogman 🇺🇸 856 41 4 May 2022 766th Natanaelel 🇸🇪 856 41 4 May 2022 769th jared-hughes 856 72 6 Jul 2022 769th Steffan153 🇫🇮 856 72 3 Jan 2023 769th MeWhenI 🇻🇦 856 72 7 May 2023 769th ListeriaM 856 72 22 Aug 2023 769th larcherMTT 856 72 5 Oct 2024 769th snyderek 🇺🇸 856 72 19 Feb 2025 769th 5quiwyrm 856 72 29 Jun 2025 769th TeodorDyakov 🇧🇬 856 72 8 Jul 2025 769th xiaoyiming123 856 72 24 days ago 778th MeWhenI 🇻🇦 856 81 23 May 2023 779th KatieLG 🇬🇧 855 115 25 Sep 2022 779th emgordon154 855 115 17 Jan 2025 781st ovs-code 🇩🇪 854 83 1 Jul 2024 782nd eshilo-draper 854 137 4 Sep 2022 783rd DialFrost 🇸🇬 853 50 24 Oct 2023 784th 386asm 🇺🇸 853 86 9 Apr 2023 785th yeminghan2021 853 99 3 Feb 2025 786th MeWhenI 🇻🇦 852 71 13 Dec 2022 787th typeswitch-dev 🇵🇹 852 75 22 Jul 2023 788th eshilo-draper 852 91 4 Sep 2022 788th ericlangedijk 🇸🇮 852 91 23 May 2023 788th KatieLG 🇬🇧 852 91 30 Apr 2024 788th Mikey-Beep 🇬🇧 852 91 3 Sep 2024 792nd henrydukepickle 852 97 27 days ago 793rd Frowny 851 38 5 May 2022 793rd stackofbears 851 38 14 Mar 2025 795th Shanethegamer 🇺🇸 851 83 4 May 2022 796th o0lit3 🇺🇸 850 54 22 Jun 2023 796th Natanaelel 🇸🇪 850 54 10 Feb 2025 798th Yewzir 🇧🇪 850 65 9 Oct 2023 798th MeWhenI 🇻🇦 850 65 10 Oct 2023 800th frosster 850 76 12 May 2023 800th kyleclaassen 850 76 20 May 2023 800th RockOfStone 850 76 17 Mar 2024 800th NickTheEASDude 🇺🇸 850 76 7 May 2024 800th koipondx86 850 76 8 Nov 2024 805th MeWhenI 🇻🇦 850 92 10 Oct 2022 805th Betuaredead 850 92 5 Jan 2023 805th emgordon154 850 92 27 May 2025 808th Shanethegamer 🇺🇸 849 99 27 Apr 2023 809th SirBogman 🇺🇸 848 55 5 May 2022 809th xiBread 🇺🇸 848 55 6 May 2022 809th 4hg 🇺🇸 848 55 24 Aug 2022 809th DialFrost 🇸🇬 848 55 1 Jan 2023 809th error256 848 55 4 May 2024 814th mtirado1 848 74 24 Dec 2022 814th Betuaredead 848 74 6 Jan 2023 814th KatieLG 🇬🇧 848 74 15 Jan 2023 814th bwat2 848 74 31 Mar 2023 814th stackotter 848 74 29 May 2023 814th ovs-code 🇩🇪 848 74 17 Apr 2024 814th madeforlosers 848 74 21 Nov 2024 821st Re-Adventures 🇮🇳 848 116 16 Jul 2023 821st Yewzir 🇧🇪 848 116 7 Feb 2024 823rd JayXon 🇺🇸 847 56 9 May 2022 824th azka1368 847 138 23 Nov 2023 825th MeWhenI 🇻🇦 846 26 25 Aug 2022 Prev 751–825 of 3,208 Next