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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 401st Shanethegamer 🇺🇸 904 77 14ms 15 May 2023 401st kg583 🇺🇸 904 77 18ms 11 Mar 2026 403rd edsrzf 🇳🇿 904 83 41ms 14 Jan 2025 403rd kg583 🇺🇸 904 83 42ms 14 Feb 2025 405th m-tkach 🇺🇦 904 90 31ms 7 Dec 2023 406th piano-miles 904 92 411ms 24 Feb 2026 407th Betuaredead 903 60 4ms 5 Jan 2023 407th Yewzir 🇧🇪 903 60 4ms 12 Feb 2023 407th Steffan153 🇫🇮 903 60 4ms 23 Feb 2023 407th GolfingSuccess 🇬🇷 903 60 4ms 16 Oct 2024 407th sean-niemann 🇺🇸 903 60 9ms 7 Mar 2025 412th GolfingSuccess 🇬🇷 903 64 70ms 14 Dec 2024 412th MeWhenI 🇻🇦 903 64 104ms 24 Dec 2024 412th GrayJoKing 🇦🇺 903 64 93ms 25 Nov 2025 415th krcs 🇵🇱 903 86 397ms 10 May 2022 415th billings7 🇬🇧 903 86 407ms 15 May 2022 415th revlayle 🇺🇸 903 86 440ms 7 Dec 2022 415th albanian-laundromat 🇺🇸 903 86 455ms 30 Sep 2025 419th shellbertt 🇨🇦 902 62 21ms 4 May 2022 419th ZakkkkAttackkkk 🇵🇭 902 62 21ms 5 May 2022 419th annaproxy 902 62 21ms 8 Jun 2022 419th bob-th 902 62 21ms 9 Jul 2022 419th btjones0 902 62 27ms 15 Jul 2022 419th tri1212 🇻🇳 902 62 21ms 18 Jul 2022 419th fredrik-bakke 🇳🇴 902 62 21ms 5 Oct 2022 419th jakobkordez 🇸🇮 902 62 19ms 19 Oct 2022 419th Fishron 902 62 20ms 29 Nov 2022 419th KatieLG 🇬🇧 902 62 24ms 11 Dec 2022 419th ItsMeNoobieboy 902 62 19ms 20 Dec 2022 419th firegene 🇮🇪 902 62 21ms 3 Jan 2023 419th ljweel 902 62 20ms 13 Feb 2023 419th 2011-Chan-Ethan 902 62 21ms 9 Jul 2023 419th elgan65536 🇺🇸 902 62 23ms 18 Nov 2023 419th Dataen 902 62 19ms 16 Jan 2024 419th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 419th cuboids 902 62 21ms 11 Jul 2024 419th wuzekai518 902 62 25ms 26 Jul 2024 419th abhishekg999 902 62 49ms 17 Sep 2024 419th lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 419th Artemis21 🇬🇧 902 62 22ms 17 Jan 2025 419th lolgeny 902 62 20ms 22 Feb 2025 419th keelimeguy 🇺🇸 902 62 20ms 15 May 2025 419th DoubleUynn 902 62 22ms 25 Jun 2025 419th madeforlosers 902 62 22ms 11 days ago 445th Kacarott 🇦🇺 902 79 121ms 13 Jun 2024 446th MeWhenI 🇻🇦 901 63 191ms 5 May 2022 447th Lydxn 🇨🇦 901 64 181ms 1 Apr 2023 448th stefangimmillaro 901 92 132ms 24 Oct 2023 448th inverseLorentz 🇦🇺 901 92 133ms 27 May 2024 448th sean-niemann 🇺🇸 901 92 140ms 8 Jun 2025 448th ian-h-chamberlain 🇺🇸 901 92 136ms 23 Nov 2025 452nd michael-pruglo 🇺🇦 901 94 58ms 5 Jul 2022 452nd zygoloid 901 94 59ms 5 Aug 2024 452nd AdrienHache 🇫🇷 901 94 57ms 27 Dec 2025 455th Lydxn 🇨🇦 900 70 106ms 7 May 2022 456th Steffan153 🇫🇮 900 82 42ms 1 Apr 2023 456th sean-niemann 🇺🇸 900 82 42ms 12 Jul 2024 458th Lydxn 🇨🇦 899 49 37ms 4 May 2022 458th JayXon 🇺🇸 899 49 37ms 17 Oct 2022 458th GrayJoKing 🇦🇺 899 49 37ms 15 Nov 2022 458th radarek 🇵🇱 899 49 192ms 26 Aug 2025 462nd MeWhenI 🇻🇦 899 71 139ms 20 Aug 2024 463rd m-tkach 🇺🇦 899 72 114ms 16 Oct 2022 463rd GrayJoKing 🇦🇺 899 72 112ms 22 Oct 2022 463rd emplv 🇱🇻 899 72 111ms 27 Oct 2022 463rd sean-niemann 🇺🇸 899 72 126ms 7 Mar 2025 467th DialFrost 🇸🇬 898 74 17ms 22 Feb 2026 467th Steffan153 🇫🇮 898 74 22ms 22 Feb 2026 467th GrayJoKing 🇦🇺 898 74 16ms 22 Feb 2026 467th GolfingSuccess 🇬🇷 898 74 18ms 24 Feb 2026 467th snoozingnewt 🇨🇦 898 74 18ms 4 Mar 2026 467th edsrzf 🇳🇿 898 74 16ms 9 Mar 2026 473rd albanian-laundromat 🇺🇸 898 106 329ms 22 Dec 2025 474th Lydxn 🇨🇦 896 69 6ms 12 Sep 2022 474th GrayJoKing 🇦🇺 896 69 7ms 12 Sep 2022 474th btnlq 896 69 7ms 24 Sep 2022 477th m-tkach 🇺🇦 896 117 25ms 7 May 2022 477th Lydxn 🇨🇦 896 117 26ms 7 May 2022 479th Steffan153 🇫🇮 895 67 110ms 18 Dec 2022 479th Lydxn 🇨🇦 895 67 118ms 4 Feb 2023 First Prev 401–480 of 3,764 Next Last