The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Leyland Numbers in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Minesweeper 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Minesweeper 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 400th cbrt-x 865 79 128ms 18 Oct 2022 400th ashtraypettingzoo 🇺🇸 865 79 236ms 17 Feb 2023 400th tobeannouncd 865 79 122ms 19 Sep 2023 400th strout 865 79 114ms 14 Dec 2023 400th DialFrost 🇸🇬 865 79 125ms 6 Aug 2024 406th sean-niemann 🇺🇸 864 70 89ms 28 Feb 2023 407th primo-ppcg 🇹🇭 864 96 160ms 6 Nov 2021 408th Re-Adventures 🇮🇳 864 131 574ms 19 Aug 2022 409th nwellnhof 🇩🇪 864 144 529ms 23 May 2022 410th emgordon154 864 237 468ms 20 Mar 2025 411th sean-niemann 🇺🇸 863 131 303ms 5 Aug 2025 412th primo-ppcg 🇹🇭 863 239 11ms 13 Aug 2025 413th JayXon 🇺🇸 862 74 247ms 9 Aug 2024 413th sean-niemann 🇺🇸 862 74 480ms 22 Aug 2024 415th sisyphus-ppcg 🇦🇺 861 65 3ms 17 Oct 2023 416th Shanethegamer 🇺🇸 860 97 22ms 28 Nov 2024 416th edsrzf 🇳🇿 860 97 38ms 13 Apr 2025 416th kg583 🇺🇸 860 97 36ms 18 Sep 2025 419th NewDefectus 🇮🇱 859 78 10ms 8 Jul 2021 419th Irratix 🇳🇱 859 78 69ms 29 Oct 2021 419th emplv 🇱🇻 859 78 68ms 29 Oct 2021 419th vlpx 🇫🇮 859 78 66ms 1 Aug 2024 423rd MeWhenI 🇻🇦 859 218 1,303ms 22 Apr 2024 424th lacrosse 858 79 71ms 24 days ago 425th edsrzf 🇳🇿 858 113 3ms 15 Mar 2025 426th AdrienHache 🇫🇷 858 132 393ms 5 Oct 2024 426th MeWhenI 🇻🇦 858 132 350ms 19 Jun 2025 428th primo-ppcg 🇹🇭 857 72 1,007ms 9 Jan 2022 429th Shanethegamer 🇺🇸 857 87 5ms 25 Apr 2023 429th kg583 🇺🇸 857 87 4ms 7 Nov 2025 431st Steffan153 🇫🇮 857 132 207ms 17 Feb 2023 432nd namelessiw 857 143 392ms 7 Nov 2025 433rd DialFrost 🇸🇬 857 230 2,521ms 7 Nov 2025 434th GrayJoKing 🇦🇺 856 55 217ms 5 Oct 2020 435th TimCurwick 🇺🇸 856 66 639ms 30 Nov 2020 436th GolfingSuccess 🇬🇷 856 239 730ms 27 Jan 2025 437th ovs-code 🇩🇪 855 55 54ms 22 Jan 2025 438th bstrautin 855 83 11ms 27 Jul 2020 438th neihousaigaai 855 83 9ms 8 May 2021 438th commandblockguy 🇺🇸 855 83 14ms 5 Sep 2022 438th glesnick 855 83 10ms 12 Oct 2022 438th AbhilashaTandon 855 83 11ms 23 Nov 2022 438th badboj40 855 83 10ms 27 Dec 2022 438th Just4FunCoder 855 83 16ms 22 Mar 2023 438th levavft 855 83 13ms 26 Oct 2023 438th Anonymousellama21 855 83 9ms 9 Aug 2024 438th wh3n3v3r 🇨🇿 855 83 9ms 12 Nov 2024 438th Andre3582 855 83 9ms 10 Oct 2025 449th edsrzf 🇳🇿 855 120 109ms 22 days ago 449th GolfingSuccess 🇬🇷 855 120 115ms 22 days ago 449th DialFrost 🇸🇬 855 120 100ms 18 days ago 452nd primo-ppcg 🇹🇭 853 119 40ms 28 Jun 2022 453rd saltysylvi 851 36 36ms 5 Aug 2022 454th UnderKoen 🇳🇱 851 114 2ms 30 Jun 2022 455th namelessiw 851 133 372ms 6 Nov 2025 456th Bubbler-4 850 41 2ms 8 Feb 2023 457th rucin93 🇵🇱 850 75 467ms 22 days ago 458th stefangimmillaro 850 122 3,470ms 5 Dec 2024 459th JDiLenarda 🇫🇷 849 88 1,278ms 3 Dec 2023 460th sean-niemann 🇺🇸 849 130 2,003ms 19 Nov 2025 461st GrayJoKing 🇦🇺 848 33 61ms 31 Jul 2022 461st Steffan153 🇫🇮 848 33 61ms 17 Jan 2023 463rd snoozingnewt 🇨🇦 848 121 104ms 21 days ago 464th CaedenHarper 🇨🇦 847 77 750ms 9 Sep 2025 465th Re-Adventures 🇮🇳 847 83 754ms 24 Mar 2021 466th lynn 847 141 230ms 3 Feb 2025 467th primo-ppcg 🇹🇭 846 147 240ms 18 Jan 2022 468th Shanethegamer 🇺🇸 846 242 505ms 21 Jan 2025 469th Steffan153 🇫🇮 845 73 89ms 20 Sep 2023 469th stefangimmillaro 845 73 956ms 5 Dec 2024 471st Indivicivet 845 84 18ms 17 Oct 2021 471st Nigel-C 845 84 9ms 30 May 2022 471st OhmNomNom 845 84 10ms 14 Oct 2022 471st betaveros 845 84 9ms 31 Dec 2022 471st yzhs 🇩🇪 845 84 9ms 23 Jun 2023 471st JunkIce 845 84 9ms 24 Nov 2024 471st Lv0Sys 🇵🇱 845 84 10ms 18 days ago 478th Sp3000 🇦🇺 845 112 101ms 13 Jan 2024 479th KasperKivimaeki 🇫🇮 845 125 8ms 11 Nov 2025 480th ovs-code 🇩🇪 845 176 264ms 25 Aug 2023 First Prev 401–480 of 1,862 Next Last