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 Continued Fractions 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 Continued Fractions 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 824th 4hg 🇺🇸 849 55 46ms 24 Aug 2022 824th DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 824th error256 849 55 43ms 4 May 2024 829th Grrisly 849 114 264ms 25 Mar 2024 830th JayXon 🇺🇸 848 56 998ms 9 May 2022 831st DialFrost 🇸🇬 848 162 1,795ms 13 Sep 2025 831st emgordon154 848 162 1,676ms 17 Sep 2025 833rd the-zammers 847 68 188ms 2 Oct 2023 834th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 834th AlephSquirrel 846 26 141ms 6 Jan 2023 834th ovs-code 🇩🇪 846 26 524ms 5 May 2024 834th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 838th randolchance 846 63 10ms 8 Jan 2023 838th CatsAreFluffy 846 63 10ms 18 Feb 2023 838th amiralitaheri 846 63 10ms 23 Feb 2023 838th RuyiLi 846 63 11ms 1 Apr 2023 838th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 838th pfysches-boop 846 63 13ms 6 Aug 2023 838th mhgockel 846 63 14ms 19 Aug 2023 838th NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 838th 823126 846 63 12ms 14 Nov 2024 838th Palladium02 846 63 12ms 12 May 2025 838th 4very 846 63 10ms 10 Jun 2025 838th Ultra814 846 63 10ms 21 Aug 2025 850th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 850th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 850th albanian-laundromat 845 57 507ms 7 Oct 2025 853rd NewDefectus 🇮🇱 845 73 3ms 6 May 2022 853rd inventshah 845 73 3ms 12 Jun 2022 853rd Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 853rd Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 853rd LorenzoDeGaspari 845 73 3ms 27 May 2024 853rd Bpc-CPU 845 73 2ms 12 Jul 2025 853rd AZTECCO 845 73 3ms 16 Sep 2025 853rd CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 861st lynn 845 96 30ms 11 Jul 2023 862nd Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 862nd emgordon154 845 98 122ms 18 Feb 2025 864th jared-hughes 845 100 57ms 20 Jul 2022 864th ZakkkkAttackkkk 🇵🇭 845 100 53ms 10 Aug 2022 864th Walter225 845 100 56ms 25 Jul 2023 867th retrohun 844 64 6ms 6 Nov 2022 867th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 867th stellartux 844 64 5ms 26 Dec 2023 867th bac0id 844 64 5ms 29 Jun 2024 867th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 867th albanian-laundromat 844 64 5ms 22 Sep 2025 873rd janAkali 🇷🇺 844 77 118ms 12 Feb 2025 874th bschorno 843 92 337ms 12 Oct 2022 874th ChrisTheisen 843 92 374ms 14 Dec 2022 874th kellantech 843 92 333ms 4 Jul 2023 874th Mezzofloat 843 92 286ms 26 Aug 2023 874th Maximizer02 843 92 291ms 1 Oct 2023 874th madeforlosers 843 92 296ms 21 Nov 2024 874th ChromaChroma 843 92 342ms 7 Oct 2025 874th snoozingnewt 🇺🇸 843 92 363ms 8 Oct 2025 882nd dokutan 843 93 428ms 27 Sep 2025 883rd krcs 🇵🇱 842 53 242ms 9 May 2022 883rd ryanlanegit 842 53 287ms 19 Jun 2022 883rd sisyphus-ppcg 🇦🇺 842 53 388ms 15 Aug 2022 886th DialFrost 🇸🇬 842 66 83ms 7 Apr 2025 887th SirBogman 🇺🇸 842 89 51ms 4 May 2022 888th KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 888th emgordon154 842 115 255ms 17 Jan 2025 890th error256 841 81 75ms 13 Sep 2024 891st CLOStrophobic 🇮🇹 841 89 40ms 14 Feb 2025 892nd kmathis22 841 100 29ms 7 days ago 893rd raszpi 🇭🇺 840 77 106ms 1 Sep 2023 894th eshilo-draper 839 75 85ms 6 Sep 2022 894th kmathis22 839 75 78ms 5 Sep 2025 896th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 897th Codsilla 🇨🇦 838 51 263ms 1 Jul 2022 898th frankgraziano 838 66 4ms 20 Apr 2025 899th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 899th Natanaelel 🇸🇪 838 83 11ms 8 Jul 2023 First Prev 826–900 of 3,449 Next Last