Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 451st nai62 911 69 7ms 27 Aug 2022 452nd GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 453rd GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 453rd MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 455th Shanethegamer 🇺🇸 910 77 13ms 15 May 2023 456th primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 456th AlephSquirrel 910 93 30ms 21 Jan 2023 456th kg583 🇺🇸 910 93 29ms 26 Dec 2024 456th CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 456th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 461st MeWhenI 🇻🇦 909 63 238ms 5 May 2022 462nd edsrzf 🇳🇿 909 72 129ms 3 Jul 2025 463rd marshallward 🇺🇸 909 83 46ms 10 May 2022 464th ovs-code 🇩🇪 909 84 66ms 25 Sep 2022 464th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 464th edsrzf 🇳🇿 909 84 80ms 3 days ago 467th Betuaredead 908 60 6ms 5 Jan 2023 467th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 467th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 467th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 467th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 467th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 473rd DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 474th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 475th KrausRaus 🇺🇸 907 59 13ms 4 May 2022 475th voytxt 🇨🇿 907 59 10ms 4 May 2022 475th KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 475th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 475th aksyristos 907 59 10ms 28 Oct 2022 475th nstearns96 🇬🇧 907 59 10ms 28 Nov 2022 475th janbehrens 🇩🇪 907 59 10ms 17 May 2023 475th Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 475th Maznek 907 59 10ms 26 Jun 2023 475th SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 475th Andrey-Plotnikov 907 59 10ms 19 May 2024 475th emgordon154 907 59 10ms 5 Aug 2024 475th duckyluuk 🇳🇱 907 59 11ms 3 Oct 2024 475th lifthrasiir 🇰🇷 907 59 13ms 23 Nov 2024 475th fuzzylojik-golf 🇺🇸 907 59 10ms 1 Jun 2025 475th acollett89 907 59 11ms 17 Jun 2025 475th iczelia 🇩🇪 907 59 14ms 23 Sep 2025 492nd edsrzf 🇳🇿 907 83 41ms 14 Jan 2025 492nd kg583 🇺🇸 907 83 39ms 14 Feb 2025 494th nipzu 906 48 55ms 8 Sep 2024 495th Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 495th error256 906 80 130ms 8 Apr 2025 497th Shanethegamer 🇺🇸 906 82 19ms 19 Dec 2023 497th edsrzf 🇳🇿 906 82 19ms 6 Jan 2025 499th krcs 🇵🇱 906 86 325ms 10 May 2022 499th billings7 🇬🇧 906 86 411ms 15 May 2022 499th revlayle 🇺🇸 906 86 353ms 7 Dec 2022 499th Widgitty 906 86 356ms 1 Sep 2023 499th albanian-laundromat 906 86 319ms 30 Sep 2025 504th shinh 905 52 42ms 29 Jun 2022 505th Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 506th Lydxn 🇨🇦 905 70 89ms 7 May 2022 507th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 508th Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 508th jared-hughes 904 72 4ms 4 May 2022 508th Waffle3z 904 72 7ms 5 May 2022 508th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 508th GrayJoKing 🇦🇺 904 72 104ms 22 Oct 2022 508th emplv 🇱🇻 904 72 104ms 27 Oct 2022 508th sean-niemann 🇺🇸 904 72 110ms 7 Mar 2025 508th Blendi-Goose 904 72 6ms 16 Mar 2025 508th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 508th sean-niemann 🇺🇸 904 72 6ms 16 Oct 2025 518th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 518th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 520th stefangimmillaro 903 92 131ms 24 Oct 2023 520th inverseLorentz 🇦🇺 903 92 126ms 27 May 2024 520th sean-niemann 🇺🇸 903 92 124ms 8 Jun 2025 523rd Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 523rd GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 523rd btnlq 902 69 7ms 24 Sep 2022 First Prev 451–525 of 3,464 Next Last