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 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 United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 301st emplv 🇱🇻 932 60 5 May 2022 301st GrayJoKing 🇦🇺 932 60 6 May 2022 301st targrik 932 60 24 Dec 2024 301st xsot 🇸🇬 932 60 1 May 2025 305th MeWhenI 🇻🇦 931 68 23 Feb 2023 305th JayXon 🇺🇸 931 68 4 Mar 2025 307th m-tkach 🇺🇦 931 91 5 May 2022 307th 09cf 931 91 4 Oct 2023 309th GrayJoKing 🇦🇺 930 56 15 Jan 2024 309th AlephSquirrel 930 56 21 Jan 2024 311th ovs-code 🇩🇪 930 60 9 Oct 2023 311th GrayJoKing 🇦🇺 930 60 11 Oct 2023 311th Lydxn 🇨🇦 930 60 11 Oct 2023 311th GolfingSuccess 🇬🇷 930 60 16 Nov 2023 311th Steffan153 🇫🇮 930 60 28 Jan 2024 311th JayXon 🇺🇸 930 60 29 Jan 2024 311th rucin93 🇵🇱 930 60 10 Jul 2024 311th sean-niemann 🇺🇸 930 60 10 Jul 2024 319th GrayJoKing 🇦🇺 930 70 13 Jul 2024 319th FlyingPenguin223 930 70 4 Oct 2024 319th jipsong 🇩🇪 930 70 5 Apr 2025 322nd Natanaelel 🇸🇪 929 28 22 Jul 2022 322nd SirBogman 🇺🇸 929 28 17 Sep 2022 324th Lydxn 🇨🇦 929 70 17 Oct 2022 324th JayXon 🇺🇸 929 70 17 Oct 2022 326th sisyphus-ppcg 🇦🇺 928 50 31 Jan 2023 326th saito-ta 🇯🇵 928 50 12 Dec 2024 328th Steffan153 🇫🇮 928 67 19 Aug 2024 328th JayXon 🇺🇸 928 67 19 Aug 2024 330th JayXon 🇺🇸 927 57 19 Aug 2024 331st roavin 927 84 23 Jun 2022 331st tkr-sh 🇫🇷 927 84 20 Aug 2022 331st Nickmiste 927 84 9 Nov 2022 331st Matgc04 927 84 19 May 2023 331st postie77 927 84 19 May 2023 331st ertz1ertz 927 84 13 Sep 2024 331st Grabnukebomb 927 84 13 Sep 2024 331st Shanethegamer 🇺🇸 927 84 9 Apr 2025 331st HumanoidCPU 927 84 10 Apr 2025 331st annaproxy 927 84 11 Apr 2025 331st Re-Adventures 🇮🇳 927 84 15 Apr 2025 331st janbehrens 🇩🇪 927 84 17 Apr 2025 343rd scpchicken 🇵🇼 926 72 4 May 2022 343rd sultan 926 72 6 Jun 2022 343rd annaproxy 926 72 22 Aug 2022 343rd BlankSpruce 926 72 9 Sep 2022 343rd ValentinCassayre 926 72 8 Oct 2022 343rd commandblockguy 🇺🇸 926 72 3 Nov 2022 343rd mathb0y512 926 72 1 Dec 2022 343rd NoahBolohan 🇨🇦 926 72 28 Feb 2023 343rd neel11235813 926 72 8 Mar 2023 343rd Kacarott 🇦🇺 926 72 24 Mar 2023 343rd Fracture17 926 72 8 Apr 2023 343rd ayushdewan 926 72 7 May 2023 343rd PeterTillema 🇳🇱 926 72 17 Oct 2023 343rd Glinte 926 72 11 Dec 2023 343rd nanatsu8 926 72 11 May 2024 343rd thej10n 926 72 12 Jun 2024 343rd duckyluuk 🇳🇱 926 72 13 Jun 2024 343rd tobeannouncd 926 72 25 Apr 2025 343rd YAJUE114514 926 72 15 Aug 2025 362nd ovs-code 🇩🇪 925 67 13 Dec 2022 362nd Steffan153 🇫🇮 925 67 18 Dec 2022 362nd Lydxn 🇨🇦 925 67 4 Feb 2023 362nd sean-niemann 🇺🇸 925 67 7 Mar 2025 366th Lydxn 🇨🇦 924 108 6 May 2022 366th JayXon 🇺🇸 924 108 9 May 2022 368th Bubbler-4 923 33 6 May 2022 368th rak1507 🇬🇧 923 33 8 May 2022 368th ngn 🇧🇬 923 33 11 May 2022 368th zacjl 923 33 3 Jun 2025 368th GrayJoKing 🇦🇺 923 33 4 Jun 2025 373rd btnlq 923 59 6 Nov 2022 374th Lydxn 🇨🇦 923 90 6 May 2022 374th kumavale 923 90 22 days ago Prev 301–375 of 3,343 Next