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 Minesweeper 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 Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Luau 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 Luau 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 Minesweeper 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 Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 822nd error256 849 55 43ms 4 May 2024 827th Grrisly 849 114 264ms 25 Mar 2024 828th JayXon 🇺🇸 848 56 998ms 9 May 2022 829th DialFrost 🇸🇬 848 162 1,795ms 13 Sep 2025 829th emgordon154 848 162 1,676ms 17 Sep 2025 831st the-zammers 847 68 188ms 2 Oct 2023 832nd MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 832nd AlephSquirrel 846 26 141ms 6 Jan 2023 832nd ovs-code 🇩🇪 846 26 524ms 5 May 2024 832nd saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 836th randolchance 846 63 10ms 8 Jan 2023 836th CatsAreFluffy 846 63 10ms 18 Feb 2023 836th amiralitaheri 846 63 10ms 23 Feb 2023 836th RuyiLi 846 63 11ms 1 Apr 2023 836th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 836th pfysches-boop 846 63 13ms 6 Aug 2023 836th mhgockel 846 63 14ms 19 Aug 2023 836th NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 836th 823126 846 63 12ms 14 Nov 2024 836th Palladium02 846 63 12ms 12 May 2025 836th 4very 846 63 10ms 10 Jun 2025 836th gigaprofisi 🇺🇸 846 63 11ms 17 Jun 2025 836th Ultra814 846 63 10ms 21 Aug 2025 849th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 849th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 849th albanian-laundromat 845 57 507ms 7 Oct 2025 852nd NewDefectus 🇮🇱 845 73 3ms 6 May 2022 852nd inventshah 845 73 3ms 12 Jun 2022 852nd Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 852nd Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 852nd LorenzoDeGaspari 845 73 3ms 27 May 2024 852nd Bpc-CPU 845 73 2ms 12 Jul 2025 852nd AZTECCO 845 73 3ms 16 Sep 2025 852nd CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 860th lynn 845 96 30ms 11 Jul 2023 861st Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 861st emgordon154 845 98 122ms 18 Feb 2025 863rd jared-hughes 845 100 57ms 20 Jul 2022 863rd ZakkkkAttackkkk 🇵🇭 845 100 53ms 10 Aug 2022 863rd Walter225 845 100 56ms 25 Jul 2023 866th retrohun 844 64 6ms 6 Nov 2022 866th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 866th stellartux 844 64 5ms 26 Dec 2023 866th bac0id 844 64 5ms 29 Jun 2024 866th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 866th albanian-laundromat 844 64 5ms 22 Sep 2025 872nd janAkali 🇷🇺 844 77 118ms 12 Feb 2025 873rd bschorno 843 92 337ms 12 Oct 2022 873rd ChrisTheisen 843 92 374ms 14 Dec 2022 873rd kellantech 843 92 333ms 4 Jul 2023 873rd Mezzofloat 843 92 286ms 26 Aug 2023 873rd Maximizer02 843 92 291ms 1 Oct 2023 873rd madeforlosers 843 92 296ms 21 Nov 2024 873rd ChromaChroma 843 92 342ms 7 Oct 2025 873rd snoozingnewt 🇺🇸 843 92 363ms 8 Oct 2025 881st dokutan 843 93 428ms 27 Sep 2025 882nd krcs 🇵🇱 842 53 242ms 9 May 2022 882nd ryanlanegit 842 53 287ms 19 Jun 2022 882nd sisyphus-ppcg 🇦🇺 842 53 388ms 15 Aug 2022 885th DialFrost 🇸🇬 842 66 83ms 7 Apr 2025 886th SirBogman 🇺🇸 842 89 51ms 4 May 2022 887th KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 887th emgordon154 842 115 255ms 17 Jan 2025 889th error256 841 81 75ms 13 Sep 2024 890th kmathis22 841 100 29ms 3 days ago 891st raszpi 🇭🇺 840 77 106ms 1 Sep 2023 892nd eshilo-draper 839 75 85ms 6 Sep 2022 892nd kmathis22 839 75 78ms 5 Sep 2025 894th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 895th CLOStrophobic 🇮🇹 839 89 40ms 14 Feb 2025 896th Codsilla 🇨🇦 838 51 263ms 1 Jul 2022 897th frankgraziano 838 66 4ms 20 Apr 2025 898th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 898th Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 900th emplv 🇱🇻 838 124 27ms 31 Oct 2022 First Prev 826–900 of 3,444 Next Last