Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 674th Steffan153 🇫🇮 872 49 236ms 10 Dec 2022 674th ovs-code 🇩🇪 872 49 389ms 24 Oct 2023 674th sean-niemann 🇺🇸 872 49 231ms 12 Jul 2024 679th dokutan 872 62 5ms 28 Apr 2025 680th DialFrost 🇸🇬 872 86 40ms 24 Oct 2024 680th stefangimmillaro 872 86 42ms 14 Jan 2025 682nd c0d3-4-F00d 🇩🇪 872 89 370ms 5 May 2022 682nd fkantelberg 872 89 340ms 15 Jul 2023 682nd bac0id 872 89 336ms 26 Sep 2023 682nd TRexOnGit 872 89 378ms 16 Feb 2024 686th emgordon154 872 96 128ms 8 days ago 687th inventshah 872 97 59ms 6 May 2022 687th roupiq 🇵🇱 872 97 55ms 22 Nov 2023 689th MeWhenI 🇻🇦 872 109 278ms 9 Feb 2023 690th janbehrens 🇩🇪 871 90 442ms 21 Apr 2023 690th Yewzir 🇧🇪 871 90 426ms 22 Apr 2023 690th DialFrost 🇸🇬 871 90 440ms 6 Nov 2023 690th Ripick 871 90 439ms 27 Nov 2024 690th emgordon154 871 90 368ms 2 days ago 695th AlephSquirrel 870 80 12ms 20 Apr 2023 695th ashtraypettingzoo 🇺🇸 870 80 15ms 1 Apr 2024 697th GolfingSuccess 🇬🇷 869 71 2ms 5 May 2022 697th emplv 🇱🇻 869 71 2ms 5 May 2022 697th JayXon 🇺🇸 869 71 2ms 7 May 2022 697th m-tkach 🇺🇦 869 71 2ms 15 May 2022 697th nwellnhof 🇩🇪 869 71 2ms 5 Jun 2022 697th Irratix 🇳🇱 869 71 2ms 13 Jun 2022 697th michael-pruglo 🇺🇦 869 71 2ms 13 Jul 2022 697th stefangimmillaro 869 71 2ms 2 Jun 2023 697th kkoenig 869 71 2ms 21 Dec 2023 697th JohandeRuiter 🇳🇱 869 71 2ms 14 Sep 2024 697th masinag 🇮🇹 869 71 2ms 6 Oct 2024 708th dokutan 868 82 23ms 1 Jul 2024 709th nwellnhof 🇩🇪 867 53 6ms 4 May 2022 709th GrayJoKing 🇦🇺 867 53 7ms 6 May 2022 711th dieggsy 867 97 28ms 8 Oct 2024 712th ovs-code 🇩🇪 867 133 42ms 8 Jul 2024 713th GolfingSuccess 🇬🇷 866 57 819ms 29 Aug 2025 714th Shanethegamer 🇺🇸 866 70 99ms 12 Dec 2022 714th Alessandro-Balconi 🇮🇹 866 70 95ms 26 Dec 2022 714th snoozingnewt 🇨🇦 866 70 207ms 19 days ago 717th Andriamanitra 🇫🇮 865 54 37ms 21 Jul 2022 717th jared-hughes 865 54 37ms 12 Sep 2022 717th OhmNomNom 865 54 37ms 7 Oct 2022 717th olleicua 🇺🇸 865 54 39ms 21 Jan 2024 717th LostSyntax21 🇬🇧 865 54 38ms 12 Mar 2025 717th AbrahamJLR 🇻🇪 865 54 36ms 4 Jun 2025 717th vishal-mohanty 865 54 36ms 25 Aug 2025 724th MeWhenI 🇻🇦 865 85 41ms 27 Jun 2022 724th Shanethegamer 🇺🇸 865 85 38ms 15 May 2023 724th albanian-laundromat 865 85 40ms 25 Aug 2025 727th 123mjb 865 96 356ms 21 days ago 727th noescareno 865 96 406ms 20 days ago 729th DialFrost 🇸🇬 864 64 5ms 10 Jul 2024 730th emplv 🇱🇻 864 110 296ms 5 May 2022 730th Shanethegamer 🇺🇸 864 110 261ms 21 Nov 2023 730th edsrzf 🇳🇿 864 110 258ms 28 Nov 2024 730th targrik 864 110 267ms 30 Jun 2025 734th mtirado1 863 75 7ms 13 Aug 2022 735th TylerBloom 863 96 115ms 22 Mar 2024 736th Shanethegamer 🇺🇸 863 97 100ms 15 Apr 2025 736th GolfingSuccess 🇬🇷 863 97 111ms 14 days ago 736th DialFrost 🇸🇬 863 97 94ms 10 days ago 739th shellbertt 🇨🇦 863 98 56ms 9 May 2022 739th iakolzin 863 98 55ms 26 May 2022 739th Betuaredead 863 98 55ms 5 Jan 2023 739th oceko 863 98 55ms 19 Feb 2024 739th dokutan 863 98 55ms 17 Mar 2024 739th cuzdav 863 98 54ms 4 May 2025 739th timhaj 🇸🇮 863 98 57ms 12 Sep 2025 739th Yax42 🇫🇷 863 98 57ms 4 Oct 2025 747th Steffan153 🇫🇮 862 82 1,287ms 23 Feb 2023 748th deadp4nda 🇩🇪 862 90 372ms 26 Apr 2024 748th 123mjb 862 90 352ms 23 Jun 2025 748th michelebastione 🇮🇹 862 90 384ms 24 Aug 2025 First Prev 676–750 of 3,493 Next Last