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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 900th undersquire 833 74 24 Jun 2023 900th rdmsr 833 74 24 Jun 2023 900th Bmrl7 833 74 9 Jul 2023 900th Vinterion 833 74 6 Nov 2023 900th namelessiw 833 74 28 Dec 2023 900th Jonatan6 🇩🇰 833 74 15 Mar 2024 900th Mandrzejy 🇵🇱 833 74 12 Apr 2024 900th kaurakeksi 🇫🇮 833 74 29 Dec 2024 900th TeodorDyakov 🇧🇬 833 74 3 hours ago 910th CLOStrophobic 🇮🇹 833 89 14 Feb 2025 911th p-vf 🇨🇭 833 93 24 Jun 2022 911th Smetalo 833 93 25 Aug 2022 911th malworthy 833 93 19 Aug 2024 914th Steffan153 🇫🇮 833 97 18 Jan 2023 915th RyanMHsiao 833 159 24 Sep 2024 916th Steffan153 🇫🇮 832 55 21 Dec 2022 917th Shanethegamer 🇺🇸 832 57 15 Dec 2022 917th anter69 🇭🇺 832 57 23 Feb 2023 917th stefangimmillaro 832 57 6 May 2023 920th elisherer 🇮🇱 832 64 5 Jun 2022 920th Ashikpaul 🇮🇳 832 64 29 Jul 2022 920th LukeBridges 🇬🇧 832 64 26 Oct 2022 920th florton 832 64 18 Jan 2023 920th DayDun 🇸🇪 832 64 24 Jan 2023 920th lyphyser 832 64 3 Jun 2023 920th Davr1 🇨🇿 832 64 14 Oct 2023 920th stellartux 832 64 26 Dec 2023 920th goodwyna21 832 64 12 Nov 2024 920th xShadowBlade 832 64 26 Dec 2024 930th dokutan 832 88 9 Jun 2024 931st MeWhenI 🇻🇦 832 101 5 May 2022 932nd Yewzir 🇧🇪 831 69 24 Dec 2024 933rd nwellnhof 🇩🇪 831 117 16 Nov 2022 934th ovs-code 🇩🇪 830 60 3 Aug 2024 934th GrayJoKing 🇦🇺 830 60 24 Oct 2024 934th Shanethegamer 🇺🇸 830 60 19 Dec 2024 937th alphafalfa 830 65 23 Aug 2024 938th emplv 🇱🇻 830 124 31 Oct 2022 939th Natanaelel 🇸🇪 829 39 10 Feb 2025 940th sean-niemann 🇺🇸 829 67 5 May 2022 940th pschmid0 🇺🇸 829 67 5 Aug 2022 940th arobson13 🇨🇦 829 67 11 Apr 2023 940th janbehrens 🇩🇪 829 67 17 May 2023 944th yashima 829 141 19 Oct 2024 945th rollershutter 828 78 8 Jul 2022 945th destofr 828 78 25 Aug 2022 945th 5quiwyrm 828 78 4 Sep 2022 945th thej10n 828 78 12 Jun 2024 945th SwordF-Official 828 78 27 Apr 2025 950th GolfingSuccess 🇬🇷 828 150 18 Jan 2025 950th ovs-code 🇩🇪 828 150 27 Mar 2025 952nd tkr-sh 🇫🇷 827 102 20 Aug 2022 952nd trist224 🇫🇷 827 102 14 Dec 2022 954th msbranicky 826 100 5 Oct 2023 954th dokutan 826 100 3 Oct 2024 956th kimbo 🇺🇸 826 119 28 Dec 2022 957th TaserTheFox 🇺🇸 825 54 31 May 2023 958th sean-niemann 🇺🇸 825 79 23 Oct 2024 958th DialFrost 🇸🇬 825 79 25 Oct 2024 958th emgordon154 825 79 27 Oct 2024 958th stefangimmillaro 825 79 28 Oct 2024 962nd trinityy-7 825 94 7 Mar 2024 962nd Squimbletin 825 94 19 Apr 2025 962nd TheZwierzLF 🇵🇱 825 94 2 Jun 2025 965th MeWhenI 🇻🇦 824 90 13 Feb 2025 966th RobertHoeh 822 70 28 Jan 2024 966th jamiloBBKing 822 70 31 Jan 2025 968th AlephSquirrel 822 75 12 Jan 2023 968th Yewzir 🇧🇪 822 75 22 Apr 2023 968th Shanethegamer 🇺🇸 822 75 15 May 2023 968th imma-Spring 822 75 15 Nov 2023 968th noahgitsham 822 75 20 Jun 2024 968th not-a-pokemon 822 75 13 Apr 2025 974th Shanethegamer 🇺🇸 821 52 9 Mar 2023 975th Bubbler-4 821 68 15 Nov 2022 Prev 901–975 of 3,143 Next