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 451st stefangimmillaro 900 92 131ms 24 Oct 2023 451st inverseLorentz 🇦🇺 900 92 128ms 27 May 2024 451st sean-niemann 🇺🇸 900 92 125ms 8 Jun 2025 451st ian-h-chamberlain 🇺🇸 900 92 123ms 23 days ago 455th shinh 899 52 36ms 29 Jun 2022 455th MeWhenI 🇻🇦 899 52 60ms 25 Jul 2023 457th MeWhenI 🇻🇦 899 63 184ms 5 May 2022 458th Shanethegamer 🇺🇸 899 72 3ms 4 May 2022 458th jared-hughes 899 72 4ms 4 May 2022 458th Waffle3z 899 72 4ms 5 May 2022 458th Blendi-Goose 899 72 4ms 16 Mar 2025 458th edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 458th sean-niemann 🇺🇸 899 72 3ms 16 Oct 2025 464th michael-pruglo 🇺🇦 899 94 64ms 5 Jul 2022 464th zygoloid 899 94 74ms 5 Aug 2024 466th Lydxn 🇨🇦 898 70 91ms 7 May 2022 467th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 468th m-tkach 🇺🇦 898 72 99ms 16 Oct 2022 468th GrayJoKing 🇦🇺 898 72 105ms 22 Oct 2022 468th emplv 🇱🇻 898 72 101ms 27 Oct 2022 468th sean-niemann 🇺🇸 898 72 117ms 7 Mar 2025 472nd Steffan153 🇫🇮 898 82 42ms 1 Apr 2023 472nd sean-niemann 🇺🇸 898 82 42ms 12 Jul 2024 474th Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 474th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 474th btnlq 895 69 7ms 24 Sep 2022 474th trinityy-7 895 69 2ms 7 Aug 2025 478th SirBogman 🇺🇸 892 50 402ms 5 May 2022 478th nwellnhof 🇩🇪 892 50 397ms 3 Jun 2022 478th Lydxn 🇨🇦 892 50 404ms 15 Aug 2022 478th Steffan153 🇫🇮 892 50 408ms 9 Aug 2024 482nd Lydxn 🇨🇦 892 72 353ms 16 Jul 2023 483rd edsrzf 🇳🇿 892 78 11ms 26 Oct 2024 483rd kg583 🇺🇸 892 78 12ms 25 Sep 2025 485th MichalMarsalek 🇨🇿 892 87 366ms 5 May 2022 485th Kloppermand 🇩🇰 892 87 375ms 7 Oct 2022 485th bwat2 892 87 348ms 6 Apr 2023 488th GrayJoKing 🇦🇺 892 91 29ms 19 Jan 2023 489th oeb25 891 93 120ms 16 May 2022 489th snobee 🇨🇦 891 93 119ms 8 Dec 2022 489th logvp 891 93 120ms 2 Jan 2024 489th elgan65536 891 93 120ms 5 Mar 2024 489th smartiel 891 93 124ms 12 Aug 2024 489th trist224 🇫🇷 891 93 122ms 12 Aug 2024 489th nullie 891 93 119ms 19 Dec 2024 489th lolgeny 891 93 116ms 22 Feb 2025 497th p-zubieta 890 48 259ms 6 Mar 2024 498th Ripick 890 73 133ms 8 May 2023 499th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 500th GolfingSuccess 🇬🇷 890 95 74ms 5 May 2022 500th Alex-x90 🇺🇸 890 95 57ms 4 Dec 2022 500th Mandrzejy 🇵🇱 890 95 67ms 22 Mar 2024 503rd m-tkach 🇺🇦 890 117 25ms 7 May 2022 503rd Lydxn 🇨🇦 890 117 26ms 7 May 2022 505th Steffan153 🇫🇮 889 80 26ms 15 Nov 2022 505th error256 889 80 115ms 8 Apr 2025 507th KatieLG 🇬🇧 888 60 10ms 4 May 2022 507th ScottHamper 888 60 10ms 5 May 2022 507th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 507th 0x24a537r9 888 60 10ms 29 Jul 2022 507th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 507th eranws 888 60 10ms 10 Sep 2022 507th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 507th BloodStormKnight 888 60 10ms 15 Oct 2022 507th dzshn 888 60 10ms 3 Dec 2022 507th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 507th Betuaredead 888 60 9ms 5 Jan 2023 507th piano-miles 888 60 9ms 16 Jan 2023 507th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 507th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 507th zakariamouhid 888 60 10ms 20 May 2023 507th raphaelimahorn 888 60 10ms 23 Aug 2023 507th jbt 888 60 9ms 25 Dec 2023 507th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 507th HumanoidCPU 888 60 10ms 3 May 2024 First Prev 451–525 of 3,500 Next Last