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 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 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 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 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 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 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 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 294th sean-niemann 🇺🇸 913 71 9 Jan 2025 302nd Steffan153 🇫🇮 912 76 15 May 2023 302nd primo-ppcg 🇹🇭 912 76 15 May 2023 302nd Lydxn 🇨🇦 912 76 22 May 2023 302nd GrayJoKing 🇦🇺 912 76 24 Aug 2023 306th arctouch-cristiannevianna 912 85 3 Apr 2023 306th Widgitty 912 85 1 Sep 2023 306th tomtheisen 🇺🇸 912 85 10 Apr 2025 309th Bubbler-4 910 33 6 May 2022 309th rak1507 🇬🇧 910 33 8 May 2022 309th ngn 🇧🇬 910 33 11 May 2022 309th zacjl 910 33 3 Jun 2025 309th GrayJoKing 🇦🇺 910 33 4 Jun 2025 314th primo-ppcg 🇹🇭 910 61 6 May 2022 314th sisyphus-ppcg 🇦🇺 910 61 14 Jul 2022 316th Steffan153 🇫🇮 910 71 10 Dec 2022 316th synt7x 910 71 7 Jul 2025 318th sean-niemann 🇺🇸 910 108 25 May 2024 319th Steffan153 🇫🇮 909 71 14 Oct 2022 319th Shanethegamer 🇺🇸 909 71 15 Oct 2022 319th stefangimmillaro 909 71 16 Oct 2022 319th MeWhenI 🇻🇦 909 71 16 Oct 2022 323rd annaproxy 909 78 13 Jan 2023 323rd IanUtley 909 78 12 Nov 2023 323rd GrayJoKing 🇦🇺 909 78 28 Nov 2023 326th kg583 🇺🇸 909 79 5 days ago 327th Shanethegamer 🇺🇸 909 86 15 May 2023 327th JayXon 🇺🇸 909 86 15 May 2023 327th Steffan153 🇫🇮 909 86 16 May 2023 327th Lydxn 🇨🇦 909 86 16 May 2023 327th GrayJoKing 🇦🇺 909 86 11 Aug 2023 327th sean-niemann 🇺🇸 909 86 11 Jul 2024 333rd andersk 🇺🇸 909 91 25 Oct 2022 333rd Super-Pizza 🇨🇦 909 91 4 Dec 2022 333rd klixel 🇨🇦 909 91 20 May 2023 333rd lynn 909 91 6 Jul 2024 333rd edsrzf 🇳🇿 909 91 29 Nov 2024 333rd DialFrost 🇸🇬 909 91 7 Apr 2025 339th Lydxn 🇨🇦 908 47 5 May 2022 340th Lydxn 🇨🇦 908 70 7 May 2022 340th JayXon 🇺🇸 908 70 7 May 2022 342nd tailorspy 908 93 27 May 2024 342nd sean-niemann 🇺🇸 908 93 9 Jun 2025 344th JayXon 🇺🇸 907 53 17 Aug 2024 345th nai62 907 68 27 Aug 2022 346th cbrt-x 907 129 6 May 2022 346th FlorianCassayre 🇫🇷 907 129 20 Sep 2022 346th piano-miles 907 129 8 Feb 2023 346th Widgitty 907 129 29 May 2023 346th lukashert 907 129 7 Jun 2023 346th DialFrost 🇸🇬 907 129 29 Jan 2024 346th yoshykai 907 129 27 Mar 2025 353rd Shanethegamer 🇺🇸 906 61 9 Oct 2023 353rd edsrzf 🇳🇿 906 61 4 Jul 2025 355th pardouin 🇫🇷 906 72 21 May 2025 356th GrayJoKing 🇦🇺 905 74 1 Nov 2023 357th ovs-code 🇩🇪 905 75 12 Sep 2024 357th Kacarott 🇦🇺 905 75 13 Sep 2024 359th lynn 905 78 5 May 2022 360th Lydxn 🇨🇦 905 81 1 Apr 2023 361st ovs-code 🇩🇪 903 67 13 Dec 2022 361st Steffan153 🇫🇮 903 67 18 Dec 2022 361st Lydxn 🇨🇦 903 67 4 Feb 2023 361st DialFrost 🇸🇬 903 67 17 Mar 2025 365th primo-ppcg 🇹🇭 903 93 7 May 2022 365th AlephSquirrel 903 93 21 Jan 2023 365th kg583 🇺🇸 903 93 26 Dec 2024 365th CLOStrophobic 🇮🇹 903 93 17 Jan 2025 365th edsrzf 🇳🇿 903 93 3 Jul 2025 370th KrausRaus 🇺🇸 902 59 4 May 2022 370th voytxt 🇨🇿 902 59 4 May 2022 370th KingSkyrock 🇺🇸 902 59 18 May 2022 370th ZakkkkAttackkkk 🇵🇭 902 59 14 Jul 2022 370th aksyristos 902 59 28 Oct 2022 370th nstearns96 🇬🇧 902 59 28 Nov 2022 Prev 301–375 of 3,204 Next