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 374th kg583 🇺🇸 905 93 29ms 26 Dec 2024 374th CLOStrophobic 🇮🇹 905 93 31ms 17 Jan 2025 374th edsrzf 🇳🇿 905 93 30ms 3 Jul 2025 379th Lydxn 🇨🇦 905 107 253ms 6 May 2022 379th CaedenHarper 🇨🇦 905 107 270ms 5 Oct 2025 381st KrausRaus 🇺🇸 903 59 10ms 4 May 2022 381st voytxt 🇨🇿 903 59 9ms 4 May 2022 381st KingSkyrock 🇺🇸 903 59 9ms 18 May 2022 381st ZakkkkAttackkkk 🇵🇭 903 59 10ms 14 Jul 2022 381st aksyristos 903 59 11ms 28 Oct 2022 381st nstearns96 🇬🇧 903 59 11ms 28 Nov 2022 381st janbehrens 🇩🇪 903 59 10ms 17 May 2023 381st Shanethegamer 🇺🇸 903 59 10ms 25 May 2023 381st Maznek 903 59 10ms 26 Jun 2023 381st SpiritAxolotl 🇺🇸 903 59 12ms 20 Mar 2024 381st Andrey-Plotnikov 903 59 9ms 19 May 2024 381st emgordon154 903 59 10ms 5 Aug 2024 381st duckyluuk 🇳🇱 903 59 10ms 3 Oct 2024 381st lifthrasiir 🇰🇷 903 59 10ms 23 Nov 2024 381st fuzzylojik-golf 🇺🇸 903 59 10ms 1 Jun 2025 381st acollett89 903 59 10ms 17 Jun 2025 381st iczelia 🇩🇪 903 59 11ms 23 Sep 2025 398th GrayJoKing 🇦🇺 903 71 289ms 10 Aug 2023 399th Shanethegamer 🇺🇸 903 77 12ms 15 May 2023 400th marshallward 🇺🇸 903 83 46ms 10 May 2022 401st edsrzf 🇳🇿 902 72 127ms 3 Jul 2025 402nd edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 402nd kg583 🇺🇸 902 83 39ms 14 Feb 2025 404th krcs 🇵🇱 902 86 309ms 10 May 2022 404th billings7 🇬🇧 902 86 328ms 15 May 2022 404th revlayle 🇺🇸 902 86 330ms 7 Dec 2022 404th albanian-laundromat 902 86 362ms 30 Sep 2025 408th m-tkach 🇺🇦 902 90 31ms 7 Dec 2023 409th Betuaredead 901 60 6ms 5 Jan 2023 409th Yewzir 🇧🇪 901 60 5ms 12 Feb 2023 409th Steffan153 🇫🇮 901 60 5ms 23 Feb 2023 409th DialFrost 🇸🇬 901 60 5ms 30 Jul 2024 409th GolfingSuccess 🇬🇷 901 60 5ms 16 Oct 2024 409th sean-niemann 🇺🇸 901 60 12ms 7 Mar 2025 415th shellbertt 🇨🇦 901 62 23ms 4 May 2022 415th ZakkkkAttackkkk 🇵🇭 901 62 19ms 5 May 2022 415th annaproxy 901 62 19ms 8 Jun 2022 415th bob-th 901 62 20ms 9 Jul 2022 415th btjones0 901 62 24ms 15 Jul 2022 415th tri1212 🇻🇳 901 62 20ms 18 Jul 2022 415th fredrik-bakke 🇳🇴 901 62 21ms 5 Oct 2022 415th jakobkordez 🇸🇮 901 62 18ms 19 Oct 2022 415th Fishron 901 62 19ms 29 Nov 2022 415th KatieLG 🇬🇧 901 62 22ms 11 Dec 2022 415th ItsMeNoobieboy 901 62 19ms 20 Dec 2022 415th firegene 🇮🇪 901 62 20ms 3 Jan 2023 415th ljweel 901 62 19ms 13 Feb 2023 415th 2011-Chan-Ethan 901 62 18ms 9 Jul 2023 415th elgan65536 901 62 18ms 18 Nov 2023 415th Dataen 901 62 18ms 16 Jan 2024 415th Yewzir 🇧🇪 901 62 48ms 5 Apr 2024 415th cuboids 901 62 24ms 11 Jul 2024 415th wuzekai518 901 62 25ms 26 Jul 2024 415th abhishekg999 901 62 49ms 17 Sep 2024 415th lifthrasiir 🇰🇷 901 62 18ms 16 Nov 2024 415th Artemis21 🇬🇧 901 62 18ms 17 Jan 2025 415th lolgeny 901 62 21ms 22 Feb 2025 415th keelimeguy 🇺🇸 901 62 19ms 15 May 2025 415th Flekay 🇩🇪 901 62 34ms 19 Jun 2025 415th DoubleUynn 901 62 18ms 25 Jun 2025 415th JOrE20 🇺🇸 901 62 20ms 14 days ago 442nd GolfingSuccess 🇬🇷 901 64 86ms 14 Dec 2024 442nd MeWhenI 🇻🇦 901 64 92ms 24 Dec 2024 442nd GrayJoKing 🇦🇺 901 64 86ms 11 days ago 445th kg583 🇺🇸 901 79 18ms 30 Jul 2025 446th Lydxn 🇨🇦 900 64 199ms 1 Apr 2023 447th DialFrost 🇸🇬 900 76 198ms 3 Aug 2025 448th Kacarott 🇦🇺 900 79 117ms 13 Jun 2024 449th stefangimmillaro 900 92 131ms 24 Oct 2023 449th inverseLorentz 🇦🇺 900 92 124ms 27 May 2024 First Prev 376–450 of 3,485 Next Last