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 Calendar 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 481st MichalMarsalek 🇨🇿 892 87 436ms 5 May 2022 481st Kloppermand 🇩🇰 892 87 414ms 7 Oct 2022 481st bwat2 892 87 397ms 6 Apr 2023 484th GrayJoKing 🇦🇺 892 91 29ms 19 Jan 2023 485th Ripick 891 73 133ms 8 May 2023 486th oeb25 891 93 121ms 16 May 2022 486th snobee 🇨🇦 891 93 128ms 8 Dec 2022 486th logvp 891 93 121ms 2 Jan 2024 486th elgan65536 891 93 115ms 5 Mar 2024 486th smartiel 891 93 127ms 12 Aug 2024 486th trist224 🇫🇷 891 93 124ms 12 Aug 2024 486th nullie 891 93 125ms 19 Dec 2024 486th lolgeny 891 93 122ms 22 Feb 2025 494th p-zubieta 890 48 279ms 6 Mar 2024 495th NickTheEASDude 🇺🇸 890 76 6ms 7 May 2024 495th edsrzf 🇳🇿 890 76 6ms 23 Dec 2025 495th Shanethegamer 🇺🇸 890 76 5ms 23 Dec 2025 495th jared-hughes 890 76 5ms 24 Dec 2025 495th Waffle3z 890 76 5ms 26 Dec 2025 500th Steffan153 🇫🇮 890 80 25ms 11 Dec 2023 501st GolfingSuccess 🇬🇷 890 95 57ms 5 May 2022 501st Alex-x90 🇺🇸 890 95 57ms 4 Dec 2022 501st Mandrzejy 🇵🇱 890 95 53ms 22 Mar 2024 504th m-tkach 🇺🇦 890 117 25ms 7 May 2022 504th Lydxn 🇨🇦 890 117 26ms 7 May 2022 506th KatieLG 🇬🇧 889 60 10ms 4 May 2022 506th ScottHamper 889 60 10ms 5 May 2022 506th Re-Adventures 🇮🇳 889 60 10ms 5 May 2022 506th 0x24a537r9 889 60 11ms 29 Jul 2022 506th stefangabos 🇷🇴 889 60 11ms 19 Aug 2022 506th eranws 889 60 10ms 10 Sep 2022 506th GeorgeStechman 🇬🇧 889 60 11ms 26 Sep 2022 506th BloodStormKnight 889 60 12ms 15 Oct 2022 506th dzshn 889 60 11ms 3 Dec 2022 506th biocommando 🇫🇮 889 60 10ms 20 Dec 2022 506th Betuaredead 889 60 10ms 5 Jan 2023 506th piano-miles 889 60 11ms 16 Jan 2023 506th Yewzir 🇧🇪 889 60 11ms 12 Feb 2023 506th shellbertt 🇨🇦 889 60 11ms 26 Feb 2023 506th zakariamouhid 889 60 11ms 20 May 2023 506th raphaelimahorn 889 60 11ms 23 Aug 2023 506th jbt 889 60 11ms 25 Dec 2023 506th olleicua 🇺🇸 889 60 10ms 15 Feb 2024 506th HumanoidCPU 889 60 11ms 3 May 2024 506th dokutan 889 60 10ms 13 Aug 2024 506th LostSyntax21 🇬🇧 889 60 11ms 10 Sep 2024 506th xyangst 889 60 9ms 28 Sep 2024 506th a6166231 🇨🇳 889 60 11ms 15 May 2025 506th Protothor 889 60 10ms 8 Jul 2025 506th SebassNoob 889 60 11ms 5 Aug 2025 506th levinwinter 889 60 14ms 22 Oct 2025 506th Cube14yt 889 60 10ms 16 Nov 2025 506th gigaprofisi 🇺🇸 889 60 9ms 17 Nov 2025 506th amazingalek 🇳🇴 889 60 11ms 20 Dec 2025 506th shandriy 889 60 11ms 5 hours ago 536th Steffan153 🇫🇮 889 80 26ms 15 Nov 2022 536th error256 889 80 115ms 8 Apr 2025 538th Lydxn 🇨🇦 888 107 244ms 6 May 2022 538th CaedenHarper 🇨🇦 888 107 247ms 5 Oct 2025 540th Shanethegamer 🇺🇸 887 61 5ms 31 Oct 2022 540th MeWhenI 🇻🇦 887 61 5ms 4 Nov 2022 542nd P-Quentin 🇫🇷 887 63 18ms 3 Aug 2022 542nd kaptsanovb 887 63 28ms 20 Apr 2023 542nd fkantelberg 887 63 20ms 14 Jul 2023 542nd VictorStenvers 🇳🇱 887 63 22ms 13 Nov 2023 542nd 1231234md5 🇨🇳 887 63 18ms 14 Dec 2023 542nd f-tucker 887 63 23ms 6 Feb 2024 542nd JunkIce 887 63 23ms 24 Nov 2024 542nd Kowalskiexe 🇵🇱 887 63 19ms 19 Apr 2025 542nd 123mjb 887 63 23ms 2 Jun 2025 542nd DrakeSeteraO 887 63 52ms 24 Oct 2025 542nd enigma 887 63 33ms 21 Dec 2025 553rd JayXon 🇺🇸 887 74 2,217ms 14 Nov 2024 554th jared-hughes 887 130 23ms 15 Dec 2024 555th canissimia 🇦🇶 887 204 16ms 25 Nov 2023 556th lynn 886 65 283ms 5 May 2022 556th GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 556th Sakisan 🇧🇪 886 65 178ms 6 May 2022 556th JayXon 🇺🇸 886 65 311ms 17 Oct 2022 556th Steffan153 🇫🇮 886 65 185ms 12 Nov 2022 First Prev 481–560 of 3,513 Next Last