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 481st arjanadriaanse 🇳🇱 844 81 129ms 10 Feb 2022 481st aDwarfNamedUrist 844 81 127ms 6 Dec 2022 483rd DialFrost 🇸🇬 843 67 543ms 9 Jun 2024 484th primo-ppcg 🇹🇭 843 90 15ms 6 Feb 2022 485th Steffan153 🇫🇮 843 117 99ms 8 Apr 2023 486th DialFrost 🇸🇬 843 123 4,163ms 1 Mar 2025 487th MeWhenI 🇻🇦 843 234 1,705ms 7 Nov 2025 488th Shanethegamer 🇺🇸 842 67 4ms 17 Aug 2024 489th SirBogman 🇺🇸 841 56 170ms 29 Nov 2021 489th Natanaelel 🇸🇪 841 56 245ms 9 Dec 2021 491st elgan65536 841 142 226ms 6 Jul 2024 492nd primo-ppcg 🇹🇭 840 56 186ms 15 Sep 2020 492nd JayXon 🇺🇸 840 56 119ms 9 Jan 2022 494th GrayJoKing 🇦🇺 839 121 56ms 10 Mar 2023 495th nwellnhof 🇩🇪 839 126 2ms 22 Aug 2020 496th Yax42 🇫🇷 839 135 389ms 13 Oct 2025 497th primo-ppcg 🇹🇭 836 109 9ms 5 Feb 2025 498th abailey2020 🇺🇸 835 85 9ms 10 Dec 2020 498th Secozzi 835 85 14ms 21 Mar 2021 498th mokymok 🇺🇸 835 85 10ms 22 Jul 2021 498th tkr-sh 🇰🇵 835 85 83ms 29 Apr 2022 498th 2011-Chan-Ethan 835 85 11ms 19 Jul 2023 498th jtaxen 835 85 11ms 29 Apr 2024 498th cros107 🇦🇺 835 85 16ms 11 Jul 2024 498th hiichbindermax 835 85 12ms 17 Sep 2024 498th RaBa21 🇭🇺 835 85 83ms 17 Jul 2025 498th wuduculfre 835 85 9ms 22 Jul 2025 508th ovs-code 🇩🇪 835 245 487ms 25 Jan 2025 509th RobertHoeh 834 82 229ms 1 Feb 2024 509th YAJUE114514 834 82 117ms 15 Jul 2025 511th m-tkach 🇺🇦 832 127 2ms 30 Aug 2023 512th dcgjb 831 68 257ms 3 May 2024 513th primo-ppcg 🇹🇭 831 179 268ms 22 Aug 2020 514th zacjl 830 42 5ms 2 Nov 2025 515th lynn 830 54 988ms 13 Apr 2021 516th albanian-laundromat 829 247 512ms 20 Oct 2025 517th primo-ppcg 🇹🇭 828 116 131ms 17 Aug 2021 518th ovs-code 🇩🇪 826 57 176ms 27 May 2024 519th sk- 826 86 12ms 11 Sep 2020 519th Loag 826 86 11ms 14 Nov 2021 519th Re-Adventures 🇮🇳 826 86 25ms 1 Dec 2021 519th Irratix 🇳🇱 826 86 12ms 16 Apr 2022 519th QuincyNash 🇺🇸 826 86 10ms 6 Dec 2022 519th msbranicky 826 86 10ms 23 Jul 2023 519th aalec 826 86 15ms 25 Apr 2024 526th dokutan 826 101 15ms 8 Jun 2024 527th rowan-OzRunways 826 137 205ms 26 Jan 2021 527th kaascevich 826 137 235ms 9 Jul 2025 529th nwellnhof 🇩🇪 825 57 46ms 28 Oct 2021 529th anter69 🇭🇺 825 57 49ms 5 Apr 2022 529th Steffan153 🇫🇮 825 57 42ms 25 Mar 2023 529th GrayJoKing 🇦🇺 825 57 53ms 30 Nov 2023 529th DialFrost 🇸🇬 825 57 155ms 1 Jun 2024 529th sean-niemann 🇺🇸 825 57 51ms 4 Aug 2025 535th AdrienHache 🇫🇷 825 88 51ms 6 Oct 2024 536th iczelia 🇩🇪 824 83 117ms 19 Oct 2025 537th andersk 🇺🇸 824 145 237ms 25 Oct 2022 538th Natanaelel 🇸🇪 823 68 2ms 15 Jan 2024 539th commandblockguy 🇺🇸 822 80 510ms 1 Sep 2025 540th h3ra993huskp 🇯🇵 822 149 565ms 21 days ago 541st dvargas46 🇺🇸 820 74 6ms 25 Feb 2023 542nd SirBogman 🇺🇸 819 69 242ms 2 Jan 2022 543rd primo-ppcg 🇹🇭 819 129 3ms 21 Aug 2020 544th ovs-code 🇩🇪 818 118 4ms 2 Feb 2023 545th GolfingSuccess 🇬🇷 818 133 194ms 21 Sep 2025 546th emgordon154 818 146 227ms 14 Mar 2025 547th m-tkach 🇺🇦 817 82 10ms 30 Aug 2023 547th DialFrost 🇸🇬 817 82 14ms 6 Nov 2025 549th jiaminglimjm 🇲🇾 816 87 9ms 12 Sep 2020 549th Pena86 816 87 10ms 19 Feb 2021 549th osmith93 816 87 10ms 31 Jul 2021 549th roytu 816 87 12ms 30 May 2022 549th fkantelberg 816 87 10ms 18 Jul 2023 549th robin-scragg 816 87 11ms 23 Sep 2025 549th iczelia 🇩🇪 816 87 10ms 19 Oct 2025 549th Emutis 🇱🇹 816 87 10ms 2 Nov 2025 549th madeforlosers 816 87 612ms 13 Nov 2025 558th boxjelly 814 84 118ms 6 Jan 2021 558th yzhs 🇩🇪 814 84 121ms 24 Jul 2021 558th snoozingnewt 🇨🇦 814 84 122ms 13 Oct 2025 First Prev 481–560 of 1,862 Next Last