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 448th ian-h-chamberlain 🇺🇸 900 92 128ms 17 days ago 452nd shinh 899 52 36ms 29 Jun 2022 452nd MeWhenI 🇻🇦 899 52 60ms 25 Jul 2023 454th MeWhenI 🇻🇦 899 63 191ms 5 May 2022 455th Shanethegamer 🇺🇸 899 72 3ms 4 May 2022 455th jared-hughes 899 72 4ms 4 May 2022 455th Waffle3z 899 72 4ms 5 May 2022 455th Blendi-Goose 899 72 4ms 16 Mar 2025 455th edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 455th sean-niemann 🇺🇸 899 72 3ms 16 Oct 2025 461st michael-pruglo 🇺🇦 899 94 55ms 5 Jul 2022 461st zygoloid 899 94 53ms 5 Aug 2024 463rd Lydxn 🇨🇦 898 70 84ms 7 May 2022 464th MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 465th m-tkach 🇺🇦 898 72 97ms 16 Oct 2022 465th GrayJoKing 🇦🇺 898 72 102ms 22 Oct 2022 465th emplv 🇱🇻 898 72 100ms 27 Oct 2022 465th sean-niemann 🇺🇸 898 72 96ms 7 Mar 2025 469th Steffan153 🇫🇮 897 82 42ms 1 Apr 2023 469th sean-niemann 🇺🇸 897 82 42ms 12 Jul 2024 471st Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 471st GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 471st btnlq 895 69 7ms 24 Sep 2022 471st trinityy-7 895 69 2ms 7 Aug 2025 475th SirBogman 🇺🇸 892 50 407ms 5 May 2022 475th nwellnhof 🇩🇪 892 50 395ms 3 Jun 2022 475th Lydxn 🇨🇦 892 50 413ms 15 Aug 2022 475th Steffan153 🇫🇮 892 50 390ms 9 Aug 2024 479th Lydxn 🇨🇦 892 72 291ms 16 Jul 2023 480th edsrzf 🇳🇿 892 78 11ms 26 Oct 2024 480th kg583 🇺🇸 892 78 12ms 25 Sep 2025 482nd MichalMarsalek 🇨🇿 892 87 324ms 5 May 2022 482nd Kloppermand 🇩🇰 892 87 326ms 7 Oct 2022 482nd bwat2 892 87 310ms 6 Apr 2023 485th GrayJoKing 🇦🇺 892 91 29ms 19 Jan 2023 486th oeb25 891 93 168ms 16 May 2022 486th snobee 🇨🇦 891 93 190ms 8 Dec 2022 486th logvp 891 93 148ms 2 Jan 2024 486th elgan65536 891 93 150ms 5 Mar 2024 486th smartiel 891 93 178ms 12 Aug 2024 486th trist224 🇫🇷 891 93 141ms 12 Aug 2024 486th nullie 891 93 175ms 19 Dec 2024 486th lolgeny 891 93 178ms 22 Feb 2025 494th p-zubieta 890 48 259ms 6 Mar 2024 495th Ripick 890 73 133ms 8 May 2023 496th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 497th GolfingSuccess 🇬🇷 890 95 54ms 5 May 2022 497th Alex-x90 🇺🇸 890 95 51ms 4 Dec 2022 497th Mandrzejy 🇵🇱 890 95 52ms 22 Mar 2024 500th m-tkach 🇺🇦 890 117 25ms 7 May 2022 500th Lydxn 🇨🇦 890 117 26ms 7 May 2022 502nd Steffan153 🇫🇮 889 80 26ms 15 Nov 2022 502nd error256 889 80 115ms 8 Apr 2025 504th KatieLG 🇬🇧 888 60 10ms 4 May 2022 504th ScottHamper 888 60 10ms 5 May 2022 504th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 504th 0x24a537r9 888 60 10ms 29 Jul 2022 504th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 504th eranws 888 60 10ms 10 Sep 2022 504th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 504th BloodStormKnight 888 60 10ms 15 Oct 2022 504th dzshn 888 60 10ms 3 Dec 2022 504th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 504th Betuaredead 888 60 9ms 5 Jan 2023 504th piano-miles 888 60 9ms 16 Jan 2023 504th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 504th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 504th zakariamouhid 888 60 10ms 20 May 2023 504th raphaelimahorn 888 60 10ms 23 Aug 2023 504th jbt 888 60 9ms 25 Dec 2023 504th olleicua 🇺🇸 888 60 10ms 15 Feb 2024 504th HumanoidCPU 888 60 10ms 3 May 2024 504th dokutan 888 60 10ms 13 Aug 2024 504th LostSyntax21 🇬🇧 888 60 11ms 10 Sep 2024 504th xyangst 888 60 10ms 28 Sep 2024 First Prev 451–525 of 3,489 Next Last