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 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 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 124ms 8 Jun 2025 449th ian-h-chamberlain 🇺🇸 900 92 127ms 12 days ago 453rd MeWhenI 🇻🇦 899 63 195ms 5 May 2022 454th Shanethegamer 🇺🇸 899 72 3ms 4 May 2022 454th jared-hughes 899 72 4ms 4 May 2022 454th Waffle3z 899 72 4ms 5 May 2022 454th Blendi-Goose 899 72 4ms 16 Mar 2025 454th edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 454th sean-niemann 🇺🇸 899 72 4ms 16 Oct 2025 460th michael-pruglo 🇺🇦 899 94 55ms 5 Jul 2022 460th zygoloid 899 94 54ms 5 Aug 2024 462nd shinh 898 52 42ms 29 Jun 2022 462nd MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 464th Lydxn 🇨🇦 898 70 88ms 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 44ms 1 Apr 2023 470th sean-niemann 🇺🇸 897 82 43ms 12 Jul 2024 472nd sean-niemann 🇺🇸 897 108 260ms 25 May 2024 472nd GolfingSuccess 🇬🇷 897 108 267ms 6 Sep 2025 474th Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 474th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 474th btnlq 895 69 7ms 24 Sep 2022 477th trinityy-7 894 69 2ms 7 Aug 2025 478th SirBogman 🇺🇸 892 50 407ms 5 May 2022 478th nwellnhof 🇩🇪 892 50 402ms 3 Jun 2022 478th Lydxn 🇨🇦 892 50 413ms 15 Aug 2022 478th Steffan153 🇫🇮 892 50 390ms 9 Aug 2024 482nd edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 482nd kg583 🇺🇸 892 78 11ms 25 Sep 2025 484th MichalMarsalek 🇨🇿 892 87 324ms 5 May 2022 484th Kloppermand 🇩🇰 892 87 326ms 7 Oct 2022 484th bwat2 892 87 317ms 6 Apr 2023 487th GrayJoKing 🇦🇺 892 91 31ms 19 Jan 2023 488th Lydxn 🇨🇦 891 72 302ms 16 Jul 2023 489th oeb25 891 93 128ms 16 May 2022 489th snobee 🇨🇦 891 93 129ms 8 Dec 2022 489th logvp 891 93 123ms 2 Jan 2024 489th elgan65536 891 93 124ms 5 Mar 2024 489th smartiel 891 93 120ms 12 Aug 2024 489th trist224 🇫🇷 891 93 126ms 12 Aug 2024 489th nullie 891 93 126ms 19 Dec 2024 489th lolgeny 891 93 123ms 22 Feb 2025 497th p-zubieta 890 48 259ms 6 Mar 2024 498th Ripick 890 73 121ms 8 May 2023 499th Steffan153 🇫🇮 890 80 24ms 11 Dec 2023 500th GolfingSuccess 🇬🇷 890 95 54ms 5 May 2022 500th Alex-x90 🇺🇸 890 95 55ms 4 Dec 2022 500th Mandrzejy 🇵🇱 890 95 50ms 22 Mar 2024 503rd m-tkach 🇺🇦 890 117 27ms 7 May 2022 503rd Lydxn 🇨🇦 890 117 28ms 7 May 2022 505th Steffan153 🇫🇮 889 80 26ms 15 Nov 2022 505th error256 889 80 115ms 8 Apr 2025 507th MeWhenI 🇻🇦 889 109 260ms 9 Feb 2023 508th KatieLG 🇬🇧 888 60 11ms 4 May 2022 508th ScottHamper 888 60 10ms 5 May 2022 508th Re-Adventures 🇮🇳 888 60 10ms 5 May 2022 508th 0x24a537r9 888 60 10ms 29 Jul 2022 508th stefangabos 🇷🇴 888 60 10ms 19 Aug 2022 508th eranws 888 60 10ms 10 Sep 2022 508th GeorgeStechman 🇬🇧 888 60 10ms 26 Sep 2022 508th BloodStormKnight 888 60 10ms 15 Oct 2022 508th dzshn 888 60 11ms 3 Dec 2022 508th biocommando 🇫🇮 888 60 10ms 20 Dec 2022 508th Betuaredead 888 60 9ms 5 Jan 2023 508th piano-miles 888 60 10ms 16 Jan 2023 508th Yewzir 🇧🇪 888 60 10ms 12 Feb 2023 508th shellbertt 🇨🇦 888 60 10ms 26 Feb 2023 508th zakariamouhid 888 60 10ms 20 May 2023 508th raphaelimahorn 888 60 10ms 23 Aug 2023 508th jbt 888 60 11ms 25 Dec 2023 508th olleicua 🇺🇸 888 60 14ms 15 Feb 2024 First Prev 451–525 of 3,485 Next Last