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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 386th acollett89 904 59 12ms 17 Jun 2025 386th iczelia 🇩🇪 904 59 11ms 23 Sep 2025 386th Yax42 🇫🇷 904 59 11ms 20 Jan 2026 404th edsrzf 🇳🇿 903 72 128ms 3 Jul 2025 405th Shanethegamer 🇺🇸 903 77 14ms 15 May 2023 406th marshallward 🇺🇸 903 83 40ms 10 May 2022 407th krcs 🇵🇱 903 86 387ms 10 May 2022 407th billings7 🇬🇧 903 86 418ms 15 May 2022 407th revlayle 🇺🇸 903 86 416ms 7 Dec 2022 407th albanian-laundromat 903 86 412ms 30 Sep 2025 411th m-tkach 🇺🇦 903 90 31ms 7 Dec 2023 412th piano-miles 903 92 411ms 13 days ago 413th Betuaredead 902 60 4ms 5 Jan 2023 413th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 413th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 413th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 413th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 418th shellbertt 🇨🇦 902 62 20ms 4 May 2022 418th ZakkkkAttackkkk 🇵🇭 902 62 20ms 5 May 2022 418th annaproxy 902 62 21ms 8 Jun 2022 418th bob-th 902 62 20ms 9 Jul 2022 418th btjones0 902 62 25ms 15 Jul 2022 418th tri1212 🇻🇳 902 62 20ms 18 Jul 2022 418th fredrik-bakke 🇳🇴 902 62 19ms 5 Oct 2022 418th jakobkordez 🇸🇮 902 62 20ms 19 Oct 2022 418th Fishron 902 62 19ms 29 Nov 2022 418th KatieLG 🇬🇧 902 62 21ms 11 Dec 2022 418th ItsMeNoobieboy 902 62 20ms 20 Dec 2022 418th firegene 🇮🇪 902 62 20ms 3 Jan 2023 418th ljweel 902 62 20ms 13 Feb 2023 418th 2011-Chan-Ethan 902 62 19ms 9 Jul 2023 418th elgan65536 🇺🇸 902 62 20ms 18 Nov 2023 418th Dataen 902 62 21ms 16 Jan 2024 418th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 418th cuboids 902 62 21ms 11 Jul 2024 418th wuzekai518 902 62 24ms 26 Jul 2024 418th abhishekg999 902 62 52ms 17 Sep 2024 418th lifthrasiir 🇰🇷 902 62 20ms 16 Nov 2024 418th Artemis21 🇬🇧 902 62 18ms 17 Jan 2025 418th lolgeny 902 62 19ms 22 Feb 2025 418th keelimeguy 🇺🇸 902 62 21ms 15 May 2025 418th DoubleUynn 902 62 19ms 25 Jun 2025 443rd edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 443rd kg583 🇺🇸 902 83 42ms 14 Feb 2025 445th GolfingSuccess 🇬🇷 901 64 91ms 14 Dec 2024 445th MeWhenI 🇻🇦 901 64 91ms 24 Dec 2024 445th GrayJoKing 🇦🇺 901 64 90ms 25 Nov 2025 448th edsrzf 🇳🇿 901 78 18ms 16 Aug 2025 448th kg583 🇺🇸 901 78 18ms 16 days ago 450th stefangimmillaro 901 92 128ms 24 Oct 2023 450th inverseLorentz 🇦🇺 901 92 136ms 27 May 2024 450th sean-niemann 🇺🇸 901 92 126ms 8 Jun 2025 450th ian-h-chamberlain 🇺🇸 901 92 127ms 23 Nov 2025 454th michael-pruglo 🇺🇦 901 94 53ms 5 Jul 2022 454th zygoloid 901 94 53ms 5 Aug 2024 454th AdrienHache 🇫🇷 901 94 55ms 27 Dec 2025 457th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 458th Kacarott 🇦🇺 900 79 121ms 13 Jun 2024 459th shinh 899 52 37ms 29 Jun 2022 459th MeWhenI 🇻🇦 899 52 66ms 25 Jul 2023 461st MeWhenI 🇻🇦 899 63 184ms 5 May 2022 462nd Lydxn 🇨🇦 898 70 88ms 7 May 2022 463rd MeWhenI 🇻🇦 898 71 148ms 20 Aug 2024 464th m-tkach 🇺🇦 898 72 110ms 16 Oct 2022 464th GrayJoKing 🇦🇺 898 72 113ms 22 Oct 2022 464th emplv 🇱🇻 898 72 122ms 27 Oct 2022 464th sean-niemann 🇺🇸 898 72 181ms 7 Mar 2025 468th Steffan153 🇫🇮 898 82 42ms 1 Apr 2023 468th sean-niemann 🇺🇸 898 82 42ms 12 Jul 2024 470th albanian-laundromat 897 106 295ms 22 Dec 2025 471st GrayJoKing 🇦🇺 896 74 66ms 1 Nov 2023 472nd Lydxn 🇨🇦 895 69 6ms 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 DialFrost 🇸🇬 894 74 16ms 16 days ago 476th Steffan153 🇫🇮 894 74 16ms 16 days ago 476th GrayJoKing 🇦🇺 894 74 16ms 16 days ago 476th GolfingSuccess 🇬🇷 894 74 17ms 14 days ago 476th snoozingnewt 🇨🇦 894 74 18ms 6 days ago First Prev 401–480 of 3,594 Next Last