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 CLOStrophobic 🇮🇹 834 69 28 May 2025 902nd ChiefChippy2 833 56 4 May 2022 902nd aksyristos 833 56 29 Jan 2023 902nd anter69 🇭🇺 833 56 12 Feb 2024 902nd 3dm4n 🇫🇮 833 56 11 Mar 2024 902nd lgrandco 833 56 9 Oct 2024 902nd tatzyr 🇯🇵 833 56 10 Dec 2024 908th Alex-x90 🇺🇸 833 74 4 Dec 2022 908th undersquire 833 74 24 Jun 2023 908th rdmsr 833 74 24 Jun 2023 908th Bmrl7 833 74 9 Jul 2023 908th Vinterion 833 74 6 Nov 2023 908th namelessiw 833 74 28 Dec 2023 908th Jonatan6 🇩🇰 833 74 15 Mar 2024 908th Mandrzejy 🇵🇱 833 74 12 Apr 2024 908th kaurakeksi 🇫🇮 833 74 29 Dec 2024 917th dokutan 833 88 9 Jun 2024 918th CLOStrophobic 🇮🇹 833 89 14 Feb 2025 919th p-vf 🇨🇭 833 93 24 Jun 2022 919th Smetalo 833 93 25 Aug 2022 919th malworthy 833 93 19 Aug 2024 922nd Steffan153 🇫🇮 833 97 18 Jan 2023 923rd RyanMHsiao 833 159 24 Sep 2024 924th Steffan153 🇫🇮 832 55 21 Dec 2022 925th Shanethegamer 🇺🇸 832 57 15 Dec 2022 925th anter69 🇭🇺 832 57 23 Feb 2023 925th stefangimmillaro 832 57 6 May 2023 928th elisherer 🇮🇱 832 64 5 Jun 2022 928th Ashikpaul 🇮🇳 832 64 29 Jul 2022 928th LukeBridges 🇬🇧 832 64 26 Oct 2022 928th florton 832 64 18 Jan 2023 928th DayDun 🇸🇪 832 64 24 Jan 2023 928th lyphyser 832 64 3 Jun 2023 928th Davr1 🇨🇿 832 64 14 Oct 2023 928th stellartux 832 64 26 Dec 2023 928th goodwyna21 832 64 12 Nov 2024 928th xShadowBlade 832 64 26 Dec 2024 938th MeWhenI 🇻🇦 832 101 5 May 2022 939th Yewzir 🇧🇪 831 69 24 Dec 2024 940th nwellnhof 🇩🇪 831 117 16 Nov 2022 941st ovs-code 🇩🇪 830 60 3 Aug 2024 941st GrayJoKing 🇦🇺 830 60 24 Oct 2024 941st Shanethegamer 🇺🇸 830 60 19 Dec 2024 944th alphafalfa 830 65 23 Aug 2024 945th emplv 🇱🇻 830 124 31 Oct 2022 946th Natanaelel 🇸🇪 829 39 10 Feb 2025 947th sean-niemann 🇺🇸 829 67 5 May 2022 947th pschmid0 🇺🇸 829 67 5 Aug 2022 947th arobson13 🇨🇦 829 67 11 Apr 2023 947th janbehrens 🇩🇪 829 67 17 May 2023 951st rollershutter 829 78 8 Jul 2022 951st destofr 829 78 25 Aug 2022 951st 5quiwyrm 829 78 4 Sep 2022 951st thej10n 829 78 12 Jun 2024 951st SwordF-Official 829 78 27 Apr 2025 956th yashima 829 141 19 Oct 2024 957th GolfingSuccess 🇬🇷 828 150 18 Jan 2025 957th ovs-code 🇩🇪 828 150 27 Mar 2025 959th msbranicky 827 100 5 Oct 2023 959th dokutan 827 100 3 Oct 2024 961st tkr-sh 🇫🇷 827 102 20 Aug 2022 961st trist224 🇫🇷 827 102 14 Dec 2022 963rd kimbo 🇺🇸 826 119 28 Dec 2022 964th TaserTheFox 🇺🇸 825 54 31 May 2023 965th sean-niemann 🇺🇸 825 79 23 Oct 2024 965th DialFrost 🇸🇬 825 79 25 Oct 2024 965th emgordon154 825 79 27 Oct 2024 965th stefangimmillaro 825 79 28 Oct 2024 969th trinityy-7 825 94 7 Mar 2024 969th Squimbletin 825 94 19 Apr 2025 969th TheZwierzLF 🇵🇱 825 94 2 Jun 2025 972nd MeWhenI 🇻🇦 824 90 13 Feb 2025 973rd RobertHoeh 822 70 28 Jan 2024 973rd jamiloBBKing 822 70 31 Jan 2025 975th AlephSquirrel 822 75 12 Jan 2023 Prev 901–975 of 3,157 Next