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 ulucs 858 35 8 May 2022 751st bstrat 858 35 6 Jun 2024 751st wh3n3v3r 🇨🇿 858 35 18 Nov 2024 754th Andriamanitra 🇫🇮 858 67 26 Apr 2023 754th GrayJoKing 🇦🇺 858 67 8 Feb 2025 756th Steffan153 🇫🇮 858 78 4 Feb 2023 757th 5quiwyrm 857 52 4 Sep 2022 757th MeWhenI 🇻🇦 857 52 28 Jan 2023 757th Feniske 🇫🇷 857 52 7 Nov 2023 757th dcgjb 857 52 29 Jan 2024 757th JPRuskin 🇬🇧 857 52 7 Apr 2025 757th IISResetMe 857 52 7 Apr 2025 757th Ripick 857 52 1 Jun 2025 764th MeWhenI 🇻🇦 857 145 28 Mar 2025 765th JRaspass 🇬🇧 856 41 4 May 2022 765th SirBogman 🇺🇸 856 41 4 May 2022 765th Natanaelel 🇸🇪 856 41 4 May 2022 768th jared-hughes 856 72 6 Jul 2022 768th Steffan153 🇫🇮 856 72 3 Jan 2023 768th MeWhenI 🇻🇦 856 72 7 May 2023 768th ListeriaM 856 72 22 Aug 2023 768th larcherMTT 856 72 5 Oct 2024 768th snyderek 🇺🇸 856 72 19 Feb 2025 768th 5quiwyrm 856 72 29 Jun 2025 768th TeodorDyakov 🇧🇬 856 72 27 days ago 768th xiaoyiming123 856 72 23 days ago 777th MeWhenI 🇻🇦 856 81 23 May 2023 778th KatieLG 🇬🇧 855 115 25 Sep 2022 778th emgordon154 855 115 17 Jan 2025 780th ovs-code 🇩🇪 854 83 1 Jul 2024 781st eshilo-draper 854 137 4 Sep 2022 782nd DialFrost 🇸🇬 853 50 24 Oct 2023 783rd 386asm 🇺🇸 853 86 9 Apr 2023 784th yeminghan2021 853 99 3 Feb 2025 785th MeWhenI 🇻🇦 852 71 13 Dec 2022 786th typeswitch-dev 🇵🇹 852 75 22 Jul 2023 787th eshilo-draper 852 91 4 Sep 2022 787th ericlangedijk 🇸🇮 852 91 23 May 2023 787th KatieLG 🇬🇧 852 91 30 Apr 2024 787th Mikey-Beep 🇬🇧 852 91 3 Sep 2024 791st henrydukepickle 852 97 27 days ago 792nd Frowny 851 38 5 May 2022 792nd stackofbears 851 38 14 Mar 2025 794th Shanethegamer 🇺🇸 851 83 4 May 2022 795th o0lit3 🇺🇸 850 54 22 Jun 2023 795th Natanaelel 🇸🇪 850 54 10 Feb 2025 797th Yewzir 🇧🇪 850 65 9 Oct 2023 797th MeWhenI 🇻🇦 850 65 10 Oct 2023 799th frosster 850 76 12 May 2023 799th kyleclaassen 850 76 20 May 2023 799th RockOfStone 850 76 17 Mar 2024 799th NickTheEASDude 🇺🇸 850 76 7 May 2024 799th koipondx86 850 76 8 Nov 2024 804th MeWhenI 🇻🇦 850 92 10 Oct 2022 804th Betuaredead 850 92 5 Jan 2023 804th emgordon154 850 92 27 May 2025 807th Shanethegamer 🇺🇸 849 99 27 Apr 2023 808th SirBogman 🇺🇸 848 55 5 May 2022 808th xiBread 🇺🇸 848 55 6 May 2022 808th 4hg 🇺🇸 848 55 24 Aug 2022 808th DialFrost 🇸🇬 848 55 1 Jan 2023 808th error256 848 55 4 May 2024 813th mtirado1 848 74 24 Dec 2022 813th Betuaredead 848 74 6 Jan 2023 813th KatieLG 🇬🇧 848 74 15 Jan 2023 813th bwat2 848 74 31 Mar 2023 813th stackotter 848 74 29 May 2023 813th ovs-code 🇩🇪 848 74 17 Apr 2024 813th madeforlosers 848 74 21 Nov 2024 820th Re-Adventures 🇮🇳 848 116 16 Jul 2023 820th Yewzir 🇧🇪 848 116 7 Feb 2024 822nd JayXon 🇺🇸 847 56 9 May 2022 823rd azka1368 847 138 23 Nov 2023 824th MeWhenI 🇻🇦 846 26 25 Aug 2022 824th AlephSquirrel 846 26 6 Jan 2023 Prev 751–825 of 3,207 Next