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 449th sean-niemann 🇺🇸 900 92 125ms 8 Jun 2025 449th ian-h-chamberlain 🇺🇸 900 92 123ms 19 days ago 453rd shinh 899 52 36ms 29 Jun 2022 453rd MeWhenI 🇻🇦 899 52 60ms 25 Jul 2023 455th MeWhenI 🇻🇦 899 63 184ms 5 May 2022 456th Shanethegamer 🇺🇸 899 72 3ms 4 May 2022 456th jared-hughes 899 72 4ms 4 May 2022 456th Waffle3z 899 72 4ms 5 May 2022 456th Blendi-Goose 899 72 4ms 16 Mar 2025 456th edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 456th sean-niemann 🇺🇸 899 72 3ms 16 Oct 2025 462nd michael-pruglo 🇺🇦 899 94 55ms 5 Jul 2022 462nd zygoloid 899 94 53ms 5 Aug 2024 464th Lydxn 🇨🇦 898 70 84ms 7 May 2022 465th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 466th m-tkach 🇺🇦 898 72 97ms 16 Oct 2022 466th GrayJoKing 🇦🇺 898 72 102ms 22 Oct 2022 466th emplv 🇱🇻 898 72 100ms 27 Oct 2022 466th sean-niemann 🇺🇸 898 72 96ms 7 Mar 2025 470th Steffan153 🇫🇮 897 82 42ms 1 Apr 2023 470th sean-niemann 🇺🇸 897 82 42ms 12 Jul 2024 472nd Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 472nd GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 472nd btnlq 895 69 7ms 24 Sep 2022 472nd trinityy-7 895 69 2ms 7 Aug 2025 476th SirBogman 🇺🇸 892 50 402ms 5 May 2022 476th nwellnhof 🇩🇪 892 50 397ms 3 Jun 2022 476th Lydxn 🇨🇦 892 50 404ms 15 Aug 2022 476th Steffan153 🇫🇮 892 50 408ms 9 Aug 2024 480th Lydxn 🇨🇦 892 72 291ms 16 Jul 2023 481st edsrzf 🇳🇿 892 78 11ms 26 Oct 2024 481st kg583 🇺🇸 892 78 12ms 25 Sep 2025 483rd MichalMarsalek 🇨🇿 892 87 366ms 5 May 2022 483rd Kloppermand 🇩🇰 892 87 375ms 7 Oct 2022 483rd bwat2 892 87 348ms 6 Apr 2023 486th GrayJoKing 🇦🇺 892 91 29ms 19 Jan 2023 487th oeb25 891 93 120ms 16 May 2022 487th snobee 🇨🇦 891 93 119ms 8 Dec 2022 487th logvp 891 93 120ms 2 Jan 2024 487th elgan65536 891 93 120ms 5 Mar 2024 487th smartiel 891 93 124ms 12 Aug 2024 487th trist224 🇫🇷 891 93 122ms 12 Aug 2024 487th nullie 891 93 119ms 19 Dec 2024 487th lolgeny 891 93 116ms 22 Feb 2025 495th p-zubieta 890 48 259ms 6 Mar 2024 496th Ripick 890 73 133ms 8 May 2023 497th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 498th GolfingSuccess 🇬🇷 890 95 54ms 5 May 2022 498th Alex-x90 🇺🇸 890 95 51ms 4 Dec 2022 498th Mandrzejy 🇵🇱 890 95 52ms 22 Mar 2024 501st m-tkach 🇺🇦 890 117 25ms 7 May 2022 501st Lydxn 🇨🇦 890 117 26ms 7 May 2022 503rd Steffan153 🇫🇮 889 80 26ms 15 Nov 2022 503rd error256 889 80 115ms 8 Apr 2025 505th KatieLG 🇬🇧 888 60 10ms 4 May 2022 505th ScottHamper 888 60 10ms 5 May 2022 505th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 505th 0x24a537r9 888 60 10ms 29 Jul 2022 505th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 505th eranws 888 60 10ms 10 Sep 2022 505th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 505th BloodStormKnight 888 60 10ms 15 Oct 2022 505th dzshn 888 60 10ms 3 Dec 2022 505th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 505th Betuaredead 888 60 9ms 5 Jan 2023 505th piano-miles 888 60 9ms 16 Jan 2023 505th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 505th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 505th zakariamouhid 888 60 10ms 20 May 2023 505th raphaelimahorn 888 60 10ms 23 Aug 2023 505th jbt 888 60 9ms 25 Dec 2023 505th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 505th HumanoidCPU 888 60 10ms 3 May 2024 505th dokutan 888 60 10ms 13 Aug 2024 505th LostSyntax21 🇬🇧 888 60 11ms 10 Sep 2024 First Prev 451–525 of 3,492 Next Last