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 897th lgrandco 833 56 9 Oct 2024 897th tatzyr 🇯🇵 833 56 10 Dec 2024 903rd moustave 833 67 7 Nov 2024 904th Alex-x90 🇺🇸 833 74 4 Dec 2022 904th undersquire 833 74 24 Jun 2023 904th rdmsr 833 74 24 Jun 2023 904th Bmrl7 833 74 9 Jul 2023 904th Vinterion 833 74 6 Nov 2023 904th namelessiw 833 74 28 Dec 2023 904th Jonatan6 🇩🇰 833 74 15 Mar 2024 904th Mandrzejy 🇵🇱 833 74 12 Apr 2024 904th kaurakeksi 🇫🇮 833 74 29 Dec 2024 904th TeodorDyakov 🇧🇬 833 74 43 hours ago 914th CLOStrophobic 🇮🇹 833 89 14 Feb 2025 915th p-vf 🇨🇭 833 93 24 Jun 2022 915th Smetalo 833 93 25 Aug 2022 915th malworthy 833 93 19 Aug 2024 918th Steffan153 🇫🇮 833 97 18 Jan 2023 919th RyanMHsiao 833 159 24 Sep 2024 920th Steffan153 🇫🇮 832 55 21 Dec 2022 921st Shanethegamer 🇺🇸 832 57 15 Dec 2022 921st anter69 🇭🇺 832 57 23 Feb 2023 921st stefangimmillaro 832 57 6 May 2023 924th elisherer 🇮🇱 832 64 5 Jun 2022 924th Ashikpaul 🇮🇳 832 64 29 Jul 2022 924th LukeBridges 🇬🇧 832 64 26 Oct 2022 924th florton 832 64 18 Jan 2023 924th DayDun 🇸🇪 832 64 24 Jan 2023 924th lyphyser 832 64 3 Jun 2023 924th Davr1 🇨🇿 832 64 14 Oct 2023 924th stellartux 832 64 26 Dec 2023 924th goodwyna21 832 64 12 Nov 2024 924th xShadowBlade 832 64 26 Dec 2024 934th dokutan 832 88 9 Jun 2024 935th MeWhenI 🇻🇦 832 101 5 May 2022 936th Yewzir 🇧🇪 831 69 24 Dec 2024 937th nwellnhof 🇩🇪 831 117 16 Nov 2022 938th ovs-code 🇩🇪 830 60 3 Aug 2024 938th GrayJoKing 🇦🇺 830 60 24 Oct 2024 938th Shanethegamer 🇺🇸 830 60 19 Dec 2024 941st alphafalfa 830 65 23 Aug 2024 942nd emplv 🇱🇻 830 124 31 Oct 2022 943rd Natanaelel 🇸🇪 829 39 10 Feb 2025 944th sean-niemann 🇺🇸 829 67 5 May 2022 944th pschmid0 🇺🇸 829 67 5 Aug 2022 944th arobson13 🇨🇦 829 67 11 Apr 2023 944th janbehrens 🇩🇪 829 67 17 May 2023 948th yashima 829 141 19 Oct 2024 949th rollershutter 828 78 8 Jul 2022 949th destofr 828 78 25 Aug 2022 949th 5quiwyrm 828 78 4 Sep 2022 949th thej10n 828 78 12 Jun 2024 949th SwordF-Official 828 78 27 Apr 2025 954th GolfingSuccess 🇬🇷 828 150 18 Jan 2025 954th ovs-code 🇩🇪 828 150 27 Mar 2025 956th tkr-sh 🇫🇷 827 102 20 Aug 2022 956th trist224 🇫🇷 827 102 14 Dec 2022 958th msbranicky 826 100 5 Oct 2023 958th dokutan 826 100 3 Oct 2024 960th kimbo 🇺🇸 826 119 28 Dec 2022 961st TaserTheFox 🇺🇸 825 54 31 May 2023 962nd sean-niemann 🇺🇸 825 79 23 Oct 2024 962nd DialFrost 🇸🇬 825 79 25 Oct 2024 962nd emgordon154 825 79 27 Oct 2024 962nd stefangimmillaro 825 79 28 Oct 2024 966th trinityy-7 825 94 7 Mar 2024 966th Squimbletin 825 94 19 Apr 2025 966th TheZwierzLF 🇵🇱 825 94 2 Jun 2025 969th MeWhenI 🇻🇦 824 90 13 Feb 2025 970th RobertHoeh 822 70 28 Jan 2024 970th jamiloBBKing 822 70 31 Jan 2025 972nd AlephSquirrel 822 75 12 Jan 2023 972nd Yewzir 🇧🇪 822 75 22 Apr 2023 972nd Shanethegamer 🇺🇸 822 75 15 May 2023 972nd imma-Spring 822 75 15 Nov 2023 Prev 901–975 of 3,148 Next