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 825th AlephSquirrel 846 26 141ms 6 Jan 2023 825th ovs-code 🇩🇪 846 26 524ms 5 May 2024 825th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 829th randolchance 846 63 11ms 8 Jan 2023 829th CatsAreFluffy 846 63 11ms 18 Feb 2023 829th amiralitaheri 846 63 11ms 23 Feb 2023 829th RuyiLi 846 63 11ms 1 Apr 2023 829th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 829th pfysches-boop 846 63 14ms 6 Aug 2023 829th mhgockel 846 63 11ms 19 Aug 2023 829th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 829th 823126 846 63 15ms 14 Nov 2024 829th Palladium02 846 63 9ms 12 May 2025 829th 4very 846 63 11ms 10 Jun 2025 829th gigaprofisi 🇺🇸 846 63 10ms 17 Jun 2025 829th Ultra814 846 63 11ms 21 Aug 2025 842nd DialFrost 🇸🇬 846 162 1,795ms 13 Sep 2025 842nd emgordon154 846 162 1,676ms 17 Sep 2025 844th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 844th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 844th albanian-laundromat 845 57 507ms 7 Oct 2025 847th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 847th inventshah 845 73 3ms 12 Jun 2022 847th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 847th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 847th LorenzoDeGaspari 845 73 3ms 27 May 2024 847th Bpc-CPU 845 73 2ms 12 Jul 2025 847th AZTECCO 845 73 3ms 16 Sep 2025 847th CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 855th lynn 845 96 30ms 11 Jul 2023 856th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 856th emgordon154 845 98 121ms 18 Feb 2025 858th jared-hughes 845 100 58ms 20 Jul 2022 858th ZakkkkAttackkkk 🇵🇭 845 100 59ms 10 Aug 2022 858th Walter225 845 100 58ms 25 Jul 2023 861st retrohun 844 64 6ms 6 Nov 2022 861st Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 861st stellartux 844 64 5ms 26 Dec 2023 861st bac0id 844 64 5ms 29 Jun 2024 861st snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 861st albanian-laundromat 844 64 5ms 22 Sep 2025 867th janAkali 🇷🇺 843 77 118ms 12 Feb 2025 868th bschorno 843 92 337ms 12 Oct 2022 868th ChrisTheisen 843 92 374ms 14 Dec 2022 868th kellantech 843 92 333ms 4 Jul 2023 868th Mezzofloat 843 92 286ms 26 Aug 2023 868th Maximizer02 843 92 291ms 1 Oct 2023 868th madeforlosers 843 92 296ms 21 Nov 2024 868th ChromaChroma 843 92 342ms 7 Oct 2025 868th snoozingnewt 🇺🇸 843 92 363ms 8 Oct 2025 876th DialFrost 🇸🇬 842 66 83ms 7 Apr 2025 877th SirBogman 🇺🇸 842 89 51ms 4 May 2022 878th dokutan 842 93 428ms 27 Sep 2025 879th KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 879th emgordon154 842 115 255ms 17 Jan 2025 881st krcs 🇵🇱 841 53 242ms 9 May 2022 881st ryanlanegit 841 53 287ms 19 Jun 2022 881st sisyphus-ppcg 🇦🇺 841 53 388ms 15 Aug 2022 884th raszpi 🇭🇺 840 77 128ms 1 Sep 2023 885th error256 840 81 75ms 13 Sep 2024 886th eshilo-draper 839 75 85ms 6 Sep 2022 886th kmathis22 839 75 78ms 5 Sep 2025 888th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 889th CLOStrophobic 🇮🇹 839 89 40ms 14 Feb 2025 890th frankgraziano 838 66 5ms 20 Apr 2025 891st emplv 🇱🇻 838 124 27ms 31 Oct 2022 892nd Codsilla 🇨🇦 837 51 263ms 1 Jul 2022 893rd Andriamanitra 🇫🇮 837 83 13ms 17 Apr 2023 893rd Natanaelel 🇸🇪 837 83 13ms 8 Jul 2023 895th Steffan153 🇫🇮 837 97 33ms 18 Jan 2023 896th CatsAreFluffy 837 101 56ms 18 Feb 2023 896th annaproxy 837 101 54ms 9 May 2023 896th wojtekmal 837 101 57ms 15 Nov 2023 896th HumanoidCPU 837 101 53ms 6 May 2024 896th eMGeeneer 837 101 378ms 27 Jun 2024 First Prev 826–900 of 3,409 Next Last