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 yzhs 🇩🇪 859 65 16 Jun 2022 751st rollershutter 859 65 9 Sep 2022 751st bac0id 859 65 26 Sep 2023 751st mossiegoat 859 65 8 Jun 2025 751st RaBa21 🇭🇺 859 65 11 Jul 2025 756th Andriamanitra 🇫🇮 859 67 26 Apr 2023 757th Steffan153 🇫🇮 859 78 4 Feb 2023 758th ulucs 858 35 8 May 2022 758th bstrat 858 35 6 Jun 2024 758th wh3n3v3r 🇨🇿 858 35 18 Nov 2024 761st JRaspass 🇬🇧 857 41 4 May 2022 761st SirBogman 🇺🇸 857 41 4 May 2022 761st Natanaelel 🇸🇪 857 41 4 May 2022 764th 5quiwyrm 857 52 4 Sep 2022 764th MeWhenI 🇻🇦 857 52 28 Jan 2023 764th Feniske 🇫🇷 857 52 7 Nov 2023 764th dcgjb 857 52 29 Jan 2024 764th JPRuskin 🇬🇧 857 52 7 Apr 2025 764th IISResetMe 857 52 7 Apr 2025 764th Ripick 857 52 1 Jun 2025 771st MeWhenI 🇻🇦 857 145 28 Mar 2025 772nd jared-hughes 856 72 6 Jul 2022 772nd Steffan153 🇫🇮 856 72 3 Jan 2023 772nd MeWhenI 🇻🇦 856 72 7 May 2023 772nd ListeriaM 856 72 22 Aug 2023 772nd larcherMTT 856 72 5 Oct 2024 772nd snyderek 🇺🇸 856 72 19 Feb 2025 772nd 5quiwyrm 856 72 29 Jun 2025 772nd TeodorDyakov 🇧🇬 856 72 8 Jul 2025 772nd xiaoyiming123 856 72 12 Jul 2025 781st MeWhenI 🇻🇦 856 81 23 May 2023 782nd ovs-code 🇩🇪 855 83 1 Jul 2024 783rd KatieLG 🇬🇧 855 115 25 Sep 2022 783rd emgordon154 855 115 17 Jan 2025 785th mousetail 🇳🇱 854 41 12 days ago 786th eshilo-draper 854 137 4 Sep 2022 787th DialFrost 🇸🇬 853 50 24 Oct 2023 788th MeWhenI 🇻🇦 853 71 13 Dec 2022 789th 386asm 🇺🇸 853 86 9 Apr 2023 789th albanian-laundromat 853 86 4 days ago 791st henrydukepickle 853 97 8 Jul 2025 792nd yeminghan2021 853 99 3 Feb 2025 793rd Frowny 852 38 5 May 2022 793rd stackofbears 852 38 14 Mar 2025 795th typeswitch-dev 🇵🇹 852 75 22 Jul 2023 796th eshilo-draper 852 91 4 Sep 2022 796th ericlangedijk 🇸🇮 852 91 23 May 2023 796th KatieLG 🇬🇧 852 91 30 Apr 2024 796th Mikey-Beep 🇬🇧 852 91 3 Sep 2024 796th michelebastione 🇮🇹 852 91 9 days ago 801st frosster 851 76 12 May 2023 801st kyleclaassen 851 76 20 May 2023 801st RockOfStone 851 76 17 Mar 2024 801st NickTheEASDude 🇺🇸 851 76 7 May 2024 801st koipondx86 851 76 8 Nov 2024 806th Shanethegamer 🇺🇸 851 83 4 May 2022 807th o0lit3 🇺🇸 850 54 22 Jun 2023 807th Natanaelel 🇸🇪 850 54 10 Feb 2025 809th Yewzir 🇧🇪 850 65 9 Oct 2023 809th MeWhenI 🇻🇦 850 65 10 Oct 2023 811th MeWhenI 🇻🇦 850 92 10 Oct 2022 811th Betuaredead 850 92 5 Jan 2023 811th emgordon154 850 92 27 May 2025 814th SirBogman 🇺🇸 849 55 5 May 2022 814th xiBread 🇺🇸 849 55 6 May 2022 814th 4hg 🇺🇸 849 55 24 Aug 2022 814th DialFrost 🇸🇬 849 55 1 Jan 2023 814th error256 849 55 4 May 2024 819th mtirado1 849 74 24 Dec 2022 819th Betuaredead 849 74 6 Jan 2023 819th KatieLG 🇬🇧 849 74 15 Jan 2023 819th bwat2 849 74 31 Mar 2023 819th stackotter 849 74 29 May 2023 819th ovs-code 🇩🇪 849 74 17 Apr 2024 819th madeforlosers 849 74 21 Nov 2024 Prev 751–825 of 3,259 Next