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 Multitap Input 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 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 ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Multitap Input 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 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 SirBogman 🇺🇸 892 50 449ms 5 May 2022 481st nwellnhof 🇩🇪 892 50 423ms 3 Jun 2022 481st Lydxn 🇨🇦 892 50 437ms 15 Aug 2022 481st Steffan153 🇫🇮 892 50 501ms 9 Aug 2024 485th Lydxn 🇨🇦 892 72 353ms 16 Jul 2023 486th NickTheEASDude 🇺🇸 892 76 6ms 7 May 2024 486th edsrzf 🇳🇿 892 76 6ms 23 Dec 2025 486th Shanethegamer 🇺🇸 892 76 5ms 23 Dec 2025 486th jared-hughes 892 76 5ms 24 Dec 2025 486th Waffle3z 892 76 5ms 26 Dec 2025 486th Blendi-Goose 892 76 5ms 18 days ago 492nd edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 493rd MichalMarsalek 🇨🇿 892 87 436ms 5 May 2022 493rd Kloppermand 🇩🇰 892 87 414ms 7 Oct 2022 493rd bwat2 892 87 397ms 6 Apr 2023 493rd bpharaldsson 892 87 353ms 16 days ago 497th Ripick 891 73 122ms 8 May 2023 498th dokutan 891 88 425ms 9 days ago 499th oeb25 891 93 119ms 16 May 2022 499th snobee 🇨🇦 891 93 116ms 8 Dec 2022 499th logvp 891 93 121ms 2 Jan 2024 499th smartiel 891 93 119ms 12 Aug 2024 499th trist224 🇫🇷 891 93 121ms 12 Aug 2024 499th nullie 891 93 120ms 19 Dec 2024 499th lolgeny 891 93 124ms 22 Feb 2025 506th GolfingSuccess 🇬🇷 891 95 64ms 5 May 2022 506th Alex-x90 🇺🇸 891 95 60ms 4 Dec 2022 506th Mandrzejy 🇵🇱 891 95 59ms 22 Mar 2024 509th m-tkach 🇺🇦 891 117 25ms 7 May 2022 509th Lydxn 🇨🇦 891 117 26ms 7 May 2022 511th p-zubieta 890 48 299ms 6 Mar 2024 512th KatieLG 🇬🇧 889 60 19ms 4 May 2022 512th ScottHamper 889 60 10ms 5 May 2022 512th Re-Adventures 🇮🇳 889 60 10ms 5 May 2022 512th 0x24a537r9 889 60 10ms 29 Jul 2022 512th stefangabos 🇷🇴 889 60 10ms 19 Aug 2022 512th eranws 889 60 11ms 10 Sep 2022 512th GeorgeStechman 🇬🇧 889 60 11ms 26 Sep 2022 512th BloodStormKnight 889 60 12ms 15 Oct 2022 512th dzshn 889 60 11ms 3 Dec 2022 512th biocommando 🇫🇮 889 60 10ms 20 Dec 2022 512th Betuaredead 889 60 11ms 5 Jan 2023 512th piano-miles 889 60 10ms 16 Jan 2023 512th Yewzir 🇧🇪 889 60 12ms 12 Feb 2023 512th shellbertt 🇨🇦 889 60 11ms 26 Feb 2023 512th zakariamouhid 889 60 11ms 20 May 2023 512th raphaelimahorn 889 60 10ms 23 Aug 2023 512th jbt 889 60 10ms 25 Dec 2023 512th olleicua 🇺🇸 889 60 10ms 15 Feb 2024 512th HumanoidCPU 889 60 10ms 3 May 2024 512th dokutan 889 60 10ms 13 Aug 2024 512th LostSyntax21 🇬🇧 889 60 11ms 10 Sep 2024 512th xyangst 889 60 11ms 28 Sep 2024 512th a6166231 🇨🇳 889 60 11ms 15 May 2025 512th Protothor 889 60 10ms 8 Jul 2025 512th SebassNoob 889 60 12ms 5 Aug 2025 512th levinwinter 889 60 11ms 22 Oct 2025 512th Cube14yt 889 60 11ms 16 Nov 2025 512th gigaprofisi 🇺🇸 889 60 10ms 17 Nov 2025 512th amazingalek 🇳🇴 889 60 13ms 20 Dec 2025 512th shandriy 889 60 11ms 23 Jan 2026 512th spidunno 889 60 10ms 8 days ago 543rd Steffan153 🇫🇮 889 80 31ms 15 Nov 2022 543rd error256 889 80 121ms 8 Apr 2025 545th Lydxn 🇨🇦 888 107 293ms 6 May 2022 545th CaedenHarper 🇨🇦 888 107 288ms 5 Oct 2025 547th canissimia 🇦🇶 888 204 16ms 25 Nov 2023 548th Shanethegamer 🇺🇸 887 61 4ms 31 Oct 2022 548th MeWhenI 🇻🇦 887 61 4ms 4 Nov 2022 550th P-Quentin 🇫🇷 887 63 20ms 3 Aug 2022 550th kaptsanovb 887 63 25ms 20 Apr 2023 550th fkantelberg 887 63 19ms 14 Jul 2023 550th VictorStenvers 🇳🇱 887 63 22ms 13 Nov 2023 550th 1231234md5 🇨🇳 887 63 20ms 14 Dec 2023 550th f-tucker 887 63 23ms 6 Feb 2024 550th JunkIce 887 63 24ms 24 Nov 2024 550th Kowalskiexe 🇵🇱 887 63 19ms 19 Apr 2025 550th 123mjb 887 63 24ms 2 Jun 2025 550th DrakeSeteraO 887 63 52ms 24 Oct 2025 550th enigma 887 63 33ms 21 Dec 2025 First Prev 481–560 of 3,574 Next Last