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 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 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 823rd saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 827th randolchance 846 63 11ms 8 Jan 2023 827th CatsAreFluffy 846 63 11ms 18 Feb 2023 827th amiralitaheri 846 63 11ms 23 Feb 2023 827th RuyiLi 846 63 11ms 1 Apr 2023 827th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 827th pfysches-boop 846 63 14ms 6 Aug 2023 827th mhgockel 846 63 11ms 19 Aug 2023 827th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 827th 823126 846 63 15ms 14 Nov 2024 827th Palladium02 846 63 9ms 12 May 2025 827th 4very 846 63 11ms 10 Jun 2025 827th gigaprofisi 🇺🇸 846 63 10ms 17 Jun 2025 827th Ultra814 846 63 11ms 21 Aug 2025 840th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 840th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 840th albanian-laundromat 845 57 507ms 7 Oct 2025 843rd NewDefectus 🇮🇱 845 73 3ms 6 May 2022 843rd inventshah 845 73 3ms 12 Jun 2022 843rd Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 843rd Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 843rd LorenzoDeGaspari 845 73 3ms 27 May 2024 843rd Bpc-CPU 845 73 2ms 12 Jul 2025 843rd AZTECCO 845 73 3ms 16 Sep 2025 843rd CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 851st lynn 845 96 30ms 11 Jul 2023 852nd Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 852nd emgordon154 845 98 121ms 18 Feb 2025 854th jared-hughes 845 100 58ms 20 Jul 2022 854th ZakkkkAttackkkk 🇵🇭 845 100 59ms 10 Aug 2022 854th Walter225 845 100 58ms 25 Jul 2023 857th retrohun 844 64 6ms 6 Nov 2022 857th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 857th stellartux 844 64 5ms 26 Dec 2023 857th bac0id 844 64 5ms 29 Jun 2024 857th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 857th albanian-laundromat 844 64 5ms 22 Sep 2025 863rd janAkali 🇷🇺 843 77 118ms 12 Feb 2025 864th bschorno 843 92 337ms 12 Oct 2022 864th ChrisTheisen 843 92 374ms 14 Dec 2022 864th kellantech 843 92 333ms 4 Jul 2023 864th Mezzofloat 843 92 286ms 26 Aug 2023 864th Maximizer02 843 92 291ms 1 Oct 2023 864th madeforlosers 843 92 296ms 21 Nov 2024 864th ChromaChroma 843 92 342ms 7 Oct 2025 864th snoozingnewt 🇺🇸 843 92 363ms 8 Oct 2025 872nd DialFrost 🇸🇬 843 162 1,829ms 13 Sep 2025 872nd emgordon154 843 162 1,897ms 17 Sep 2025 874th DialFrost 🇸🇬 842 66 83ms 7 Apr 2025 875th SirBogman 🇺🇸 842 89 51ms 4 May 2022 876th dokutan 842 93 428ms 27 Sep 2025 877th KatieLG 🇬🇧 842 115 275ms 25 Sep 2022 877th emgordon154 842 115 256ms 17 Jan 2025 879th krcs 🇵🇱 841 53 242ms 9 May 2022 879th ryanlanegit 841 53 287ms 19 Jun 2022 879th sisyphus-ppcg 🇦🇺 841 53 388ms 15 Aug 2022 882nd raszpi 🇭🇺 840 77 128ms 1 Sep 2023 883rd error256 840 81 75ms 13 Sep 2024 884th eshilo-draper 839 75 85ms 6 Sep 2022 884th kmathis22 839 75 78ms 5 Sep 2025 886th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 887th CLOStrophobic 🇮🇹 839 89 40ms 14 Feb 2025 888th frankgraziano 838 66 5ms 20 Apr 2025 889th emplv 🇱🇻 838 124 27ms 31 Oct 2022 890th Codsilla 🇨🇦 837 51 263ms 1 Jul 2022 891st Andriamanitra 🇫🇮 837 83 13ms 17 Apr 2023 891st Natanaelel 🇸🇪 837 83 13ms 8 Jul 2023 893rd Steffan153 🇫🇮 837 97 33ms 18 Jan 2023 894th CatsAreFluffy 837 101 56ms 18 Feb 2023 894th annaproxy 837 101 54ms 9 May 2023 894th wojtekmal 837 101 57ms 15 Nov 2023 894th HumanoidCPU 837 101 53ms 6 May 2024 894th eMGeeneer 837 101 378ms 27 Jun 2024 894th bac0id 837 101 55ms 29 Jun 2024 894th michaelmoynihan 837 101 386ms 3 Sep 2025 First Prev 826–900 of 3,404 Next Last