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 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 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 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 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 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 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 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 Setvizan 859 62 12 Jan 2023 751st GreenBeansAgainstVeganism 859 62 13 Jan 2023 751st arctouch-cristiannevianna 859 62 3 Apr 2023 751st Corxldyphik 859 62 11 Apr 2023 751st Blockyheadman 859 62 1 Nov 2023 751st ollyspooner 859 62 22 Nov 2023 751st itserasmus 859 62 25 Jan 2024 751st Jacob385 859 62 13 Mar 2024 751st junkondo-jp 859 62 30 Jun 2024 751st ShiraJoseph 🇺🇸 859 62 1 Mar 2025 761st yzhs 🇩🇪 859 65 16 Jun 2022 761st rollershutter 859 65 9 Sep 2022 761st bac0id 859 65 26 Sep 2023 761st mossiegoat 859 65 8 Jun 2025 761st RaBa21 🇭🇺 859 65 11 Jul 2025 766th Andriamanitra 🇫🇮 859 67 26 Apr 2023 767th Steffan153 🇫🇮 859 78 4 Feb 2023 768th ulucs 858 35 8 May 2022 768th bstrat 858 35 6 Jun 2024 768th wh3n3v3r 🇨🇿 858 35 18 Nov 2024 771st JRaspass 🇬🇧 857 41 4 May 2022 771st SirBogman 🇺🇸 857 41 4 May 2022 771st Natanaelel 🇸🇪 857 41 4 May 2022 774th 5quiwyrm 857 52 4 Sep 2022 774th MeWhenI 🇻🇦 857 52 28 Jan 2023 774th Feniske 🇫🇷 857 52 7 Nov 2023 774th dcgjb 857 52 29 Jan 2024 774th JPRuskin 🇬🇧 857 52 7 Apr 2025 774th IISResetMe 857 52 7 Apr 2025 774th Ripick 857 52 1 Jun 2025 781st MeWhenI 🇻🇦 857 145 28 Mar 2025 782nd jared-hughes 856 72 6 Jul 2022 782nd Steffan153 🇫🇮 856 72 3 Jan 2023 782nd MeWhenI 🇻🇦 856 72 7 May 2023 782nd ListeriaM 856 72 22 Aug 2023 782nd larcherMTT 856 72 5 Oct 2024 782nd snyderek 🇺🇸 856 72 19 Feb 2025 782nd 5quiwyrm 856 72 29 Jun 2025 782nd TeodorDyakov 🇧🇬 856 72 8 Jul 2025 782nd xiaoyiming123 856 72 12 Jul 2025 791st MeWhenI 🇻🇦 856 81 23 May 2023 792nd ovs-code 🇩🇪 855 83 1 Jul 2024 793rd KatieLG 🇬🇧 855 115 25 Sep 2022 793rd emgordon154 855 115 17 Jan 2025 795th eshilo-draper 854 137 4 Sep 2022 796th DialFrost 🇸🇬 853 50 24 Oct 2023 797th MeWhenI 🇻🇦 853 71 13 Dec 2022 798th 386asm 🇺🇸 853 86 9 Apr 2023 799th henrydukepickle 853 97 8 Jul 2025 800th yeminghan2021 853 99 3 Feb 2025 801st Frowny 852 38 5 May 2022 801st stackofbears 852 38 14 Mar 2025 803rd typeswitch-dev 🇵🇹 852 75 22 Jul 2023 804th eshilo-draper 852 91 4 Sep 2022 804th ericlangedijk 🇸🇮 852 91 23 May 2023 804th KatieLG 🇬🇧 852 91 30 Apr 2024 804th Mikey-Beep 🇬🇧 852 91 3 Sep 2024 808th frosster 851 76 12 May 2023 808th kyleclaassen 851 76 20 May 2023 808th RockOfStone 851 76 17 Mar 2024 808th NickTheEASDude 🇺🇸 851 76 7 May 2024 808th koipondx86 851 76 8 Nov 2024 813th Shanethegamer 🇺🇸 851 83 4 May 2022 814th o0lit3 🇺🇸 850 54 22 Jun 2023 814th Natanaelel 🇸🇪 850 54 10 Feb 2025 816th Yewzir 🇧🇪 850 65 9 Oct 2023 816th MeWhenI 🇻🇦 850 65 10 Oct 2023 818th MeWhenI 🇻🇦 850 92 10 Oct 2022 818th Betuaredead 850 92 5 Jan 2023 818th emgordon154 850 92 27 May 2025 821st SirBogman 🇺🇸 849 55 5 May 2022 821st olivermrose 🇺🇸 849 55 6 May 2022 821st 4hg 🇺🇸 849 55 24 Aug 2022 821st DialFrost 🇸🇬 849 55 1 Jan 2023 821st error256 849 55 4 May 2024 Prev 751–825 of 3,272 Next