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 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 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 Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization 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 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 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 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 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 Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 823rd HumanoidCPU 835 101 6 May 2024 823rd eMGeeneer 835 101 27 Jun 2024 823rd bac0id 835 101 29 Jun 2024 829th SirBogman 🇺🇸 834 36 5 May 2022 829th HPWiz 🇳🇿 834 36 7 May 2022 829th Natanaelel 🇸🇪 834 36 15 Jun 2022 829th Steffan153 🇫🇮 834 36 18 Jan 2023 829th codereport 🇨🇦 834 36 1 Jun 2024 829th GolfinK 834 36 21 Nov 2024 829th lifthrasiir 🇰🇷 834 36 1 Dec 2024 829th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 837th scpchicken 🇵🇼 834 55 4 May 2022 837th SirBogman 🇺🇸 834 55 5 May 2022 837th Shanethegamer 🇺🇸 834 55 19 May 2023 837th DialFrost 🇸🇬 834 55 14 Feb 2025 841st inverseLorentz 🇦🇺 834 69 3 Jun 2024 841st CLOStrophobic 🇮🇹 834 69 2 days ago 843rd sean-niemann 🇺🇸 834 76 8 Oct 2024 844th primo-ppcg 🇹🇭 834 216 23 Apr 2025 845th ChiefChippy2 833 56 4 May 2022 845th aksyristos 833 56 29 Jan 2023 845th anter69 🇭🇺 833 56 12 Feb 2024 845th 3dm4n 🇫🇮 833 56 11 Mar 2024 845th lgrandco 833 56 9 Oct 2024 845th AbrahamJLR 833 56 28 Nov 2024 845th tatzyr 🇯🇵 833 56 10 Dec 2024 852nd moustave 833 67 7 Nov 2024 853rd Alex-x90 🇺🇸 833 74 4 Dec 2022 853rd undersquire 833 74 24 Jun 2023 853rd rdmsr 833 74 24 Jun 2023 853rd Bmrl7 833 74 9 Jul 2023 853rd Vinterion 833 74 6 Nov 2023 853rd namelessiw 833 74 28 Dec 2023 853rd Jonatan6 🇩🇰 833 74 15 Mar 2024 853rd Mandrzejy 🇵🇱 833 74 12 Apr 2024 853rd kaurakeksi 🇫🇮 833 74 29 Dec 2024 862nd CLOStrophobic 🇮🇹 833 89 14 Feb 2025 863rd Steffan153 🇫🇮 833 97 18 Jan 2023 864th RyanMHsiao 833 159 24 Sep 2024 865th Steffan153 🇫🇮 832 55 21 Dec 2022 866th Shanethegamer 🇺🇸 832 57 15 Dec 2022 866th anter69 🇭🇺 832 57 23 Feb 2023 866th stefangimmillaro 832 57 6 May 2023 869th elisherer 🇮🇱 832 64 5 Jun 2022 869th Ashikpaul 🇮🇳 832 64 29 Jul 2022 869th LukeBridges 🇬🇧 832 64 26 Oct 2022 869th florton 832 64 18 Jan 2023 869th DayDun 🇸🇪 832 64 24 Jan 2023 869th lyphyser 832 64 3 Jun 2023 869th Davr1 🇨🇿 832 64 14 Oct 2023 869th stellartux 832 64 26 Dec 2023 869th goodwyna21 832 64 12 Nov 2024 869th xShadowBlade 832 64 26 Dec 2024 879th dokutan 832 88 9 Jun 2024 880th MeWhenI 🇻🇦 832 101 5 May 2022 881st Yewzir 🇧🇪 831 69 24 Dec 2024 882nd nwellnhof 🇩🇪 831 117 16 Nov 2022 883rd ovs-code 🇩🇪 830 60 3 Aug 2024 883rd GrayJoKing 🇦🇺 830 60 24 Oct 2024 883rd Shanethegamer 🇺🇸 830 60 19 Dec 2024 886th alphafalfa 830 65 23 Aug 2024 887th emplv 🇱🇻 830 124 31 Oct 2022 888th Natanaelel 🇸🇪 829 39 10 Feb 2025 889th sean-niemann 🇺🇸 829 67 5 May 2022 889th pschmid0 🇺🇸 829 67 5 Aug 2022 889th arobson13 🇨🇦 829 67 11 Apr 2023 889th janbehrens 🇩🇪 829 67 17 May 2023 893rd yashima 829 141 19 Oct 2024 894th rollershutter 828 78 8 Jul 2022 894th destofr 828 78 25 Aug 2022 894th 5quiwyrm 828 78 4 Sep 2022 894th thej10n 828 78 12 Jun 2024 894th SwordF-Official 828 78 27 Apr 2025 899th tkr-sh 🇫🇷 827 102 20 Aug 2022 899th trist224 🇫🇷 827 102 14 Dec 2022 Prev 826–900 of 3,048 Next