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 ><> 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 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 ><> 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 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 marshallward 🇺🇸 903 83 40ms 10 May 2022 402nd krcs 🇵🇱 903 86 394ms 10 May 2022 402nd billings7 🇬🇧 903 86 418ms 15 May 2022 402nd revlayle 🇺🇸 903 86 416ms 7 Dec 2022 402nd albanian-laundromat 903 86 412ms 30 Sep 2025 406th m-tkach 🇺🇦 903 90 30ms 7 Dec 2023 407th Betuaredead 902 60 5ms 5 Jan 2023 407th Yewzir 🇧🇪 902 60 5ms 12 Feb 2023 407th Steffan153 🇫🇮 902 60 5ms 23 Feb 2023 407th GolfingSuccess 🇬🇷 902 60 5ms 16 Oct 2024 407th sean-niemann 🇺🇸 902 60 9ms 7 Mar 2025 412th shellbertt 🇨🇦 902 62 20ms 4 May 2022 412th ZakkkkAttackkkk 🇵🇭 902 62 20ms 5 May 2022 412th annaproxy 902 62 22ms 8 Jun 2022 412th bob-th 902 62 21ms 9 Jul 2022 412th btjones0 902 62 25ms 15 Jul 2022 412th tri1212 🇻🇳 902 62 20ms 18 Jul 2022 412th fredrik-bakke 🇳🇴 902 62 19ms 5 Oct 2022 412th jakobkordez 🇸🇮 902 62 20ms 19 Oct 2022 412th Fishron 902 62 19ms 29 Nov 2022 412th KatieLG 🇬🇧 902 62 23ms 11 Dec 2022 412th ItsMeNoobieboy 902 62 20ms 20 Dec 2022 412th firegene 🇮🇪 902 62 20ms 3 Jan 2023 412th ljweel 902 62 20ms 13 Feb 2023 412th 2011-Chan-Ethan 902 62 19ms 9 Jul 2023 412th elgan65536 🇺🇸 902 62 20ms 18 Nov 2023 412th Dataen 902 62 21ms 16 Jan 2024 412th Yewzir 🇧🇪 902 62 48ms 5 Apr 2024 412th cuboids 902 62 21ms 11 Jul 2024 412th wuzekai518 902 62 24ms 26 Jul 2024 412th abhishekg999 902 62 56ms 17 Sep 2024 412th lifthrasiir 🇰🇷 902 62 21ms 16 Nov 2024 412th Artemis21 🇬🇧 902 62 18ms 17 Jan 2025 412th lolgeny 902 62 19ms 22 Feb 2025 412th keelimeguy 🇺🇸 902 62 21ms 15 May 2025 412th DoubleUynn 902 62 19ms 25 Jun 2025 412th JOrE20 902 62 21ms 22 Nov 2025 438th edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 438th kg583 🇺🇸 902 83 42ms 14 Feb 2025 440th GolfingSuccess 🇬🇷 901 64 91ms 14 Dec 2024 440th MeWhenI 🇻🇦 901 64 94ms 24 Dec 2024 440th GrayJoKing 🇦🇺 901 64 90ms 25 Nov 2025 443rd kg583 🇺🇸 901 79 18ms 30 Jul 2025 444th Lydxn 🇨🇦 900 64 181ms 1 Apr 2023 445th Kacarott 🇦🇺 900 79 117ms 13 Jun 2024 446th stefangimmillaro 900 92 119ms 24 Oct 2023 446th inverseLorentz 🇦🇺 900 92 128ms 27 May 2024 446th sean-niemann 🇺🇸 900 92 138ms 8 Jun 2025 446th ian-h-chamberlain 🇺🇸 900 92 131ms 23 Nov 2025 450th michael-pruglo 🇺🇦 900 94 57ms 5 Jul 2022 450th zygoloid 900 94 56ms 5 Aug 2024 450th AdrienHache 🇫🇷 900 94 60ms 27 Dec 2025 453rd shinh 899 52 37ms 29 Jun 2022 453rd MeWhenI 🇻🇦 899 52 66ms 25 Jul 2023 455th edsrzf 🇳🇿 899 54 1,284ms 13 Sep 2025 455th CaedenHarper 🇨🇦 899 54 1,693ms 27 Sep 2025 455th sean-niemann 🇺🇸 899 54 1,442ms 27 Sep 2025 455th albanian-laundromat 899 54 959ms 14 Nov 2025 455th xsot 🇸🇬 899 54 1,025ms 15 Nov 2025 460th MeWhenI 🇻🇦 899 63 184ms 5 May 2022 461st Lydxn 🇨🇦 898 70 86ms 7 May 2022 462nd MeWhenI 🇻🇦 898 71 101ms 20 Aug 2024 463rd m-tkach 🇺🇦 898 72 104ms 16 Oct 2022 463rd GrayJoKing 🇦🇺 898 72 121ms 22 Oct 2022 463rd emplv 🇱🇻 898 72 113ms 27 Oct 2022 463rd sean-niemann 🇺🇸 898 72 114ms 7 Mar 2025 467th Steffan153 🇫🇮 898 82 42ms 1 Apr 2023 467th sean-niemann 🇺🇸 898 82 42ms 12 Jul 2024 469th albanian-laundromat 897 106 282ms 22 Dec 2025 470th Lydxn 🇨🇦 895 69 7ms 12 Sep 2022 470th GrayJoKing 🇦🇺 895 69 7ms 12 Sep 2022 470th btnlq 895 69 7ms 24 Sep 2022 470th trinityy-7 895 69 2ms 7 Aug 2025 474th Steffan153 🇫🇮 893 67 113ms 18 Dec 2022 474th Lydxn 🇨🇦 893 67 116ms 4 Feb 2023 474th DialFrost 🇸🇬 893 67 99ms 17 Mar 2025 477th GrayJoKing 🇦🇺 893 91 29ms 19 Jan 2023 478th SirBogman 🇺🇸 892 50 449ms 5 May 2022 478th nwellnhof 🇩🇪 892 50 423ms 3 Jun 2022 478th Lydxn 🇨🇦 892 50 437ms 15 Aug 2022 First Prev 401–480 of 3,554 Next Last