Collatz in all languages in chars. 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 Trinomial Triangle 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 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 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 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 Turtle Tutorial # Golfer Points Chars Time 599th TechNolaByte 873 61 6 Jul 2022 599th Heathcorp 🇦🇺 873 61 17 Jul 2022 599th C0de5mith 🇺🇸 873 61 3 Aug 2022 599th sebipopa 🇷🇴 873 61 18 Aug 2022 599th moikaturns 🇬🇧 873 61 25 Sep 2022 599th FlorianCassayre 🇫🇷 873 61 27 Sep 2022 599th Mazn3k 873 61 1 Feb 2023 599th tvcv901 873 61 22 Mar 2023 599th unfinishedprogram 873 61 19 Jul 2023 599th snoozingnewt 🇺🇸 873 61 23 Sep 2023 599th funnyboy-roks 873 61 9 May 2024 599th bac0id 873 61 29 Jun 2024 599th madex 🇩🇪 873 61 9 Jul 2024 599th FortuiteMan 🇫🇷 873 61 10 Oct 2024 599th RobertHoeh 873 61 5 Apr 2025 599th LvLError 873 61 29 May 2025 599th Lv0Sys 🇵🇱 873 61 30 May 2025 599th miles-evan 873 61 5 Aug 2025 619th NerdyMcNerd42 873 64 26 Oct 2022 619th tpasfieldERAU 873 64 14 Nov 2022 619th CheeseCake628 🇳🇴 873 64 6 Jan 2023 619th adamnielson42 🇺🇸 873 64 25 Apr 2023 619th nathsou 🇫🇷 873 64 2 Sep 2023 619th zwxzwxzwx21 873 64 30 Jan 2024 619th steffan-polygolf 873 64 8 Mar 2024 619th Jacob385 873 64 4 Apr 2024 619th gallium-gonzollium 873 64 26 Aug 2024 628th johnnythedoggie 873 72 13 May 2022 628th kaascevich 873 72 8 Jul 2025 630th DialFrost 🇸🇬 873 73 3 Jun 2025 631st Shanethegamer 🇺🇸 872 66 4 May 2022 631st scpchicken 🇵🇼 872 66 5 May 2022 631st sisyphus-ppcg 🇦🇺 872 66 6 May 2022 631st Natanaelel 🇸🇪 872 66 15 Jun 2022 631st Z-snails 872 66 27 Feb 2023 631st Jeremy-Stafford 872 66 27 Feb 2023 631st alomiF 872 66 1 Sep 2023 631st btnlq 872 66 17 Oct 2023 639th DialFrost 🇸🇬 872 86 24 Oct 2024 639th stefangimmillaro 872 86 14 Jan 2025 641st HPWiz 🇳🇿 871 49 4 May 2022 641st JayXon 🇺🇸 871 49 5 May 2022 641st Steffan153 🇫🇮 871 49 10 Dec 2022 641st ovs-code 🇩🇪 871 49 24 Oct 2023 641st sean-niemann 🇺🇸 871 49 12 Jul 2024 646th dokutan 871 62 28 Apr 2025 647th c0d3-4-F00d 🇩🇪 871 89 5 May 2022 647th fkantelberg 871 89 15 Jul 2023 647th bac0id 871 89 26 Sep 2023 647th TRexOnGit 871 89 16 Feb 2024 647th arcpolaris 871 89 18 Nov 2024 652nd inventshah 871 97 6 May 2022 652nd roupiq 🇵🇱 871 97 22 Nov 2023 654th GolfingSuccess 🇬🇷 869 71 5 May 2022 654th emplv 🇱🇻 869 71 5 May 2022 654th JayXon 🇺🇸 869 71 7 May 2022 654th m-tkach 🇺🇦 869 71 15 May 2022 654th nwellnhof 🇩🇪 869 71 5 Jun 2022 654th Irratix 🇳🇱 869 71 13 Jun 2022 654th michael-pruglo 🇺🇦 869 71 13 Jul 2022 654th stefangimmillaro 869 71 2 Jun 2023 654th kkoenig 869 71 21 Dec 2023 654th JohandeRuiter 🇳🇱 869 71 14 Sep 2024 654th masinag 🇮🇹 869 71 6 Oct 2024 665th AlephSquirrel 869 80 20 Apr 2023 665th ashtraypettingzoo 🇺🇸 869 80 1 Apr 2024 667th janbehrens 🇩🇪 869 90 21 Apr 2023 667th Yewzir 🇧🇪 869 90 22 Apr 2023 667th DialFrost 🇸🇬 869 90 6 Nov 2023 667th Ripick 869 90 27 Nov 2024 671st nwellnhof 🇩🇪 867 53 4 May 2022 671st GrayJoKing 🇦🇺 867 53 6 May 2022 673rd Shanethegamer 🇺🇸 866 70 12 Dec 2022 673rd Alessandro-Balconi 🇮🇹 866 70 26 Dec 2022 675th dokutan 866 82 1 Jul 2024 Prev 601–675 of 3,338 Next