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 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 Mandelbrot 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 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 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 Mandelbrot 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 826th Andriamanitra 🇫🇮 835 83 17 Apr 2023 826th Natanaelel 🇸🇪 835 83 8 Jul 2023 828th Smetalo 835 93 25 Aug 2022 828th malworthy 835 93 19 Aug 2024 830th CatsAreFluffy 835 101 18 Feb 2023 830th annaproxy 835 101 9 May 2023 830th wojtekmal 835 101 15 Nov 2023 830th HumanoidCPU 835 101 6 May 2024 830th eMGeeneer 835 101 27 Jun 2024 830th bac0id 835 101 29 Jun 2024 836th SirBogman 🇺🇸 834 36 5 May 2022 836th HPWiz 🇳🇿 834 36 7 May 2022 836th Natanaelel 🇸🇪 834 36 15 Jun 2022 836th Steffan153 🇫🇮 834 36 18 Jan 2023 836th codereport 🇨🇦 834 36 1 Jun 2024 836th GolfinK 834 36 21 Nov 2024 836th lifthrasiir 🇰🇷 834 36 1 Dec 2024 836th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 844th scpchicken 🇵🇼 834 55 4 May 2022 844th SirBogman 🇺🇸 834 55 5 May 2022 844th Shanethegamer 🇺🇸 834 55 19 May 2023 844th DialFrost 🇸🇬 834 55 14 Feb 2025 848th inverseLorentz 🇦🇺 834 69 3 Jun 2024 848th CLOStrophobic 🇮🇹 834 69 6 days ago 850th primo-ppcg 🇹🇭 834 216 23 Apr 2025 851st ChiefChippy2 833 56 4 May 2022 851st aksyristos 833 56 29 Jan 2023 851st anter69 🇭🇺 833 56 12 Feb 2024 851st 3dm4n 🇫🇮 833 56 11 Mar 2024 851st lgrandco 833 56 9 Oct 2024 851st AbrahamJLR 833 56 28 Nov 2024 851st tatzyr 🇯🇵 833 56 10 Dec 2024 858th moustave 833 67 7 Nov 2024 859th Alex-x90 🇺🇸 833 74 4 Dec 2022 859th undersquire 833 74 24 Jun 2023 859th rdmsr 833 74 24 Jun 2023 859th Bmrl7 833 74 9 Jul 2023 859th Vinterion 833 74 6 Nov 2023 859th namelessiw 833 74 28 Dec 2023 859th Jonatan6 🇩🇰 833 74 15 Mar 2024 859th Mandrzejy 🇵🇱 833 74 12 Apr 2024 859th kaurakeksi 🇫🇮 833 74 29 Dec 2024 868th CLOStrophobic 🇮🇹 833 89 14 Feb 2025 869th Steffan153 🇫🇮 833 97 18 Jan 2023 870th RyanMHsiao 833 159 24 Sep 2024 871st Steffan153 🇫🇮 832 55 21 Dec 2022 872nd Shanethegamer 🇺🇸 832 57 15 Dec 2022 872nd anter69 🇭🇺 832 57 23 Feb 2023 872nd stefangimmillaro 832 57 6 May 2023 875th elisherer 🇮🇱 832 64 5 Jun 2022 875th Ashikpaul 🇮🇳 832 64 29 Jul 2022 875th LukeBridges 🇬🇧 832 64 26 Oct 2022 875th florton 832 64 18 Jan 2023 875th DayDun 🇸🇪 832 64 24 Jan 2023 875th lyphyser 832 64 3 Jun 2023 875th Davr1 🇨🇿 832 64 14 Oct 2023 875th stellartux 832 64 26 Dec 2023 875th goodwyna21 832 64 12 Nov 2024 875th xShadowBlade 832 64 26 Dec 2024 885th dokutan 832 88 9 Jun 2024 886th MeWhenI 🇻🇦 832 101 5 May 2022 887th Yewzir 🇧🇪 831 69 24 Dec 2024 888th nwellnhof 🇩🇪 831 117 16 Nov 2022 889th ovs-code 🇩🇪 830 60 3 Aug 2024 889th GrayJoKing 🇦🇺 830 60 24 Oct 2024 889th Shanethegamer 🇺🇸 830 60 19 Dec 2024 892nd alphafalfa 830 65 23 Aug 2024 893rd emplv 🇱🇻 830 124 31 Oct 2022 894th Natanaelel 🇸🇪 829 39 10 Feb 2025 895th sean-niemann 🇺🇸 829 67 5 May 2022 895th pschmid0 🇺🇸 829 67 5 Aug 2022 895th arobson13 🇨🇦 829 67 11 Apr 2023 895th janbehrens 🇩🇪 829 67 17 May 2023 899th yashima 829 141 19 Oct 2024 900th rollershutter 828 78 8 Jul 2022 Prev 826–900 of 3,058 Next