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 Hilbert Curve 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 Topological Sort 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth 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 Groovy 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 Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 Groovy 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 Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 Hilbert Curve 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 Topological Sort 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 373rd bob-th 901 62 9 Jul 2022 373rd btjones0 901 62 15 Jul 2022 373rd tri1212 🇻🇳 901 62 18 Jul 2022 373rd fredrik-bakke 🇳🇴 901 62 5 Oct 2022 373rd jakobkordez 🇸🇮 901 62 19 Oct 2022 373rd Fishron 901 62 29 Nov 2022 373rd KatieLG 🇬🇧 901 62 11 Dec 2022 373rd ItsMeNoobieboy 901 62 20 Dec 2022 373rd firegene 🇮🇪 901 62 3 Jan 2023 373rd ljweel 901 62 13 Feb 2023 373rd 2011-Chan-Ethan 901 62 9 Jul 2023 373rd elgan65536 901 62 18 Nov 2023 373rd Dataen 901 62 16 Jan 2024 373rd Yewzir 🇧🇪 901 62 5 Apr 2024 373rd cuboids 901 62 11 Jul 2024 373rd wuzekai518 901 62 26 Jul 2024 373rd abhishekg999 901 62 17 Sep 2024 373rd lifthrasiir 🇰🇷 901 62 16 Nov 2024 373rd Artemis21 🇬🇧 901 62 17 Jan 2025 373rd lolgeny 901 62 22 Feb 2025 373rd keelimeguy 🇺🇸 901 62 15 May 2025 373rd Flekay 🇩🇪 901 62 19 Jun 2025 373rd DoubleUynn 901 62 25 Jun 2025 399th GolfingSuccess 🇬🇷 901 64 14 Dec 2024 399th MeWhenI 🇻🇦 901 64 24 Dec 2024 401st edsrzf 🇳🇿 901 72 3 Jul 2025 402nd Shanethegamer 🇺🇸 901 77 15 May 2023 403rd Betuaredead 900 60 5 Jan 2023 403rd Yewzir 🇧🇪 900 60 12 Feb 2023 403rd Steffan153 🇫🇮 900 60 23 Feb 2023 403rd DialFrost 🇸🇬 900 60 30 Jul 2024 403rd GolfingSuccess 🇬🇷 900 60 16 Oct 2024 403rd sean-niemann 🇺🇸 900 60 7 Mar 2025 409th DialFrost 🇸🇬 900 76 3 Aug 2025 410th m-tkach 🇺🇦 900 90 7 Dec 2023 411th stefangimmillaro 900 92 24 Oct 2023 411th inverseLorentz 🇦🇺 900 92 27 May 2024 411th sean-niemann 🇺🇸 900 92 8 Jun 2025 414th MeWhenI 🇻🇦 899 63 5 May 2022 415th Lydxn 🇨🇦 899 64 1 Apr 2023 416th Shanethegamer 🇺🇸 899 72 4 May 2022 416th jared-hughes 899 72 4 May 2022 416th Waffle3z 899 72 5 May 2022 416th Blendi-Goose 899 72 16 Mar 2025 416th edsrzf 🇳🇿 899 72 12 Apr 2025 421st Kacarott 🇦🇺 899 79 13 Jun 2024 421st kg583 🇺🇸 899 79 30 Jul 2025 423rd michael-pruglo 🇺🇦 899 94 5 Jul 2022 423rd zygoloid 899 94 5 Aug 2024 425th shinh 898 52 29 Jun 2022 425th MeWhenI 🇻🇦 898 52 25 Jul 2023 427th Lydxn 🇨🇦 898 70 7 May 2022 428th MeWhenI 🇻🇦 897 71 20 Aug 2024 429th m-tkach 🇺🇦 897 72 16 Oct 2022 429th GrayJoKing 🇦🇺 897 72 22 Oct 2022 429th emplv 🇱🇻 897 72 27 Oct 2022 429th sean-niemann 🇺🇸 897 72 7 Mar 2025 433rd edsrzf 🇳🇿 897 83 14 Jan 2025 433rd kg583 🇺🇸 897 83 14 Feb 2025 435th Steffan153 🇫🇮 896 82 1 Apr 2023 435th sean-niemann 🇺🇸 896 82 12 Jul 2024 437th emplv 🇱🇻 895 110 5 May 2022 437th Shanethegamer 🇺🇸 895 110 21 Nov 2023 437th edsrzf 🇳🇿 895 110 28 Nov 2024 437th targrik 895 110 30 Jun 2025 441st Lydxn 🇨🇦 894 69 12 Sep 2022 441st GrayJoKing 🇦🇺 894 69 12 Sep 2022 441st btnlq 894 69 24 Sep 2022 441st trinityy-7 894 69 7 Aug 2025 445th SirBogman 🇺🇸 892 50 5 May 2022 445th nwellnhof 🇩🇪 892 50 3 Jun 2022 445th Lydxn 🇨🇦 892 50 15 Aug 2022 445th Steffan153 🇫🇮 892 50 9 Aug 2024 449th sean-niemann 🇺🇸 892 55 26 days ago 449th albanian-laundromat 892 55 2 days ago Prev 376–450 of 3,319 Next