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 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 Apéry’s Constant Binary Lambda Calculus 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 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 401st Shanethegamer 🇺🇸 903 77 14ms 15 May 2023 402nd marshallward 🇺🇸 903 83 40ms 10 May 2022 403rd krcs 🇵🇱 903 86 387ms 10 May 2022 403rd billings7 🇬🇧 903 86 418ms 15 May 2022 403rd revlayle 🇺🇸 903 86 416ms 7 Dec 2022 403rd albanian-laundromat 903 86 412ms 30 Sep 2025 407th m-tkach 🇺🇦 903 90 31ms 7 Dec 2023 408th piano-miles 903 92 425ms 4 hours ago 409th Betuaredead 902 60 4ms 5 Jan 2023 409th Yewzir 🇧🇪 902 60 4ms 12 Feb 2023 409th Steffan153 🇫🇮 902 60 4ms 23 Feb 2023 409th GolfingSuccess 🇬🇷 902 60 4ms 16 Oct 2024 409th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 414th shellbertt 🇨🇦 902 62 20ms 4 May 2022 414th ZakkkkAttackkkk 🇵🇭 902 62 20ms 5 May 2022 414th annaproxy 902 62 21ms 8 Jun 2022 414th bob-th 902 62 20ms 9 Jul 2022 414th btjones0 902 62 25ms 15 Jul 2022 414th tri1212 🇻🇳 902 62 20ms 18 Jul 2022 414th fredrik-bakke 🇳🇴 902 62 19ms 5 Oct 2022 414th jakobkordez 🇸🇮 902 62 20ms 19 Oct 2022 414th Fishron 902 62 19ms 29 Nov 2022 414th KatieLG 🇬🇧 902 62 22ms 11 Dec 2022 414th ItsMeNoobieboy 902 62 20ms 20 Dec 2022 414th firegene 🇮🇪 902 62 20ms 3 Jan 2023 414th ljweel 902 62 20ms 13 Feb 2023 414th 2011-Chan-Ethan 902 62 19ms 9 Jul 2023 414th elgan65536 🇺🇸 902 62 20ms 18 Nov 2023 414th Dataen 902 62 21ms 16 Jan 2024 414th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 414th cuboids 902 62 21ms 11 Jul 2024 414th wuzekai518 902 62 24ms 26 Jul 2024 414th abhishekg999 902 62 52ms 17 Sep 2024 414th lifthrasiir 🇰🇷 902 62 20ms 16 Nov 2024 414th Artemis21 🇬🇧 902 62 18ms 17 Jan 2025 414th lolgeny 902 62 19ms 22 Feb 2025 414th keelimeguy 🇺🇸 902 62 21ms 15 May 2025 414th DoubleUynn 902 62 19ms 25 Jun 2025 414th JOrE20 902 62 17ms 22 Nov 2025 440th edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 440th kg583 🇺🇸 902 83 42ms 14 Feb 2025 442nd GolfingSuccess 🇬🇷 901 64 91ms 14 Dec 2024 442nd MeWhenI 🇻🇦 901 64 91ms 24 Dec 2024 442nd GrayJoKing 🇦🇺 901 64 90ms 25 Nov 2025 445th edsrzf 🇳🇿 901 78 18ms 16 Aug 2025 445th kg583 🇺🇸 901 78 20ms 3 days ago 447th michael-pruglo 🇺🇦 901 94 64ms 5 Jul 2022 447th zygoloid 901 94 54ms 5 Aug 2024 447th AdrienHache 🇫🇷 901 94 61ms 27 Dec 2025 450th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 451st Kacarott 🇦🇺 900 79 121ms 13 Jun 2024 452nd stefangimmillaro 900 92 119ms 24 Oct 2023 452nd inverseLorentz 🇦🇺 900 92 127ms 27 May 2024 452nd sean-niemann 🇺🇸 900 92 138ms 8 Jun 2025 452nd ian-h-chamberlain 🇺🇸 900 92 131ms 23 Nov 2025 456th shinh 899 52 37ms 29 Jun 2022 456th MeWhenI 🇻🇦 899 52 66ms 25 Jul 2023 458th edsrzf 🇳🇿 899 54 884ms 13 Sep 2025 458th CaedenHarper 🇨🇦 899 54 1,451ms 27 Sep 2025 458th sean-niemann 🇺🇸 899 54 1,442ms 27 Sep 2025 458th albanian-laundromat 899 54 959ms 14 Nov 2025 458th xsot 🇸🇬 899 54 1,025ms 15 Nov 2025 463rd MeWhenI 🇻🇦 899 63 184ms 5 May 2022 464th Lydxn 🇨🇦 898 70 86ms 7 May 2022 465th MeWhenI 🇻🇦 898 71 96ms 20 Aug 2024 466th m-tkach 🇺🇦 898 72 116ms 16 Oct 2022 466th GrayJoKing 🇦🇺 898 72 113ms 22 Oct 2022 466th emplv 🇱🇻 898 72 107ms 27 Oct 2022 466th sean-niemann 🇺🇸 898 72 136ms 7 Mar 2025 470th Steffan153 🇫🇮 898 82 42ms 1 Apr 2023 470th sean-niemann 🇺🇸 898 82 42ms 12 Jul 2024 472nd albanian-laundromat 897 106 282ms 22 Dec 2025 473rd Lydxn 🇨🇦 895 69 6ms 12 Sep 2022 473rd GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 473rd btnlq 895 69 7ms 24 Sep 2022 473rd trinityy-7 895 69 2ms 7 Aug 2025 477th Steffan153 🇫🇮 893 67 112ms 18 Dec 2022 477th Lydxn 🇨🇦 893 67 116ms 4 Feb 2023 477th DialFrost 🇸🇬 893 67 99ms 17 Mar 2025 480th GrayJoKing 🇦🇺 893 91 30ms 19 Jan 2023 First Prev 401–480 of 3,573 Next Last