The Calendar hole will go live in approximately 13 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 641st JunkIce 783 84 552ms 3 Dec 2024 642nd pschmid0 🇺🇸 782 90 4ms 7 Aug 2022 643rd ovs-code 🇩🇪 781 79 1,010ms 8 Oct 2023 644th sean-niemann 🇺🇸 781 125 473ms 20 Sep 2025 645th rifatx 781 145 454ms 9 Jul 2024 646th stefangimmillaro 781 153 3,268ms 17 Oct 2023 646th inverseLorentz 🇦🇺 781 153 227ms 22 Apr 2024 648th marcin7Cd 780 91 10ms 11 Dec 2020 648th schachmattmatt 780 91 10ms 2 Oct 2021 648th amollberg 🇸🇪 780 91 9ms 15 Jan 2022 648th Bonjour27891 🇻🇳 780 91 9ms 4 Mar 2022 648th nstearns96 🇬🇧 780 91 17ms 29 Nov 2022 648th AlexanderFair 780 91 10ms 11 Jul 2023 648th adamnielson42 🇺🇸 780 91 9ms 22 Aug 2023 648th jhu04 780 91 9ms 18 Jan 2024 648th jacekwladzinski 780 91 9ms 4 Oct 2025 648th Andrey2001 780 91 10ms 11 days ago 658th ScottHamper 780 157 474ms 18 days ago 659th MeWhenI 🇻🇦 779 86 11ms 1 Jul 2023 660th prplz 🇦🇺 779 149 29ms 3 Oct 2023 661st primo-ppcg 🇹🇭 778 111 44ms 30 May 2025 662nd armin-k1 777 72 3ms 9 Sep 2021 662nd scpchicken 🇵🇼 777 72 7ms 15 Dec 2022 664th m-tkach 🇺🇦 775 103 4ms 31 Jan 2024 665th DialFrost 🇸🇬 775 126 369ms 10 Nov 2025 666th janbehrens 🇩🇪 773 58 530ms 1 Nov 2021 666th alemelis 773 58 551ms 12 Apr 2023 666th m-tkach 🇺🇦 773 58 577ms 24 May 2024 666th Lv0Sys 🇵🇱 773 58 1,273ms 14 days ago 670th GrayJoKing 🇦🇺 773 73 5ms 16 Aug 2024 671st namcartoon06 773 161 2,720ms 30 Jun 2023 672nd mstang107 772 92 15ms 20 Dec 2023 672nd jameswmccarty 772 92 9ms 11 Jul 2024 672nd PyryL 🇫🇮 772 92 9ms 22 Aug 2024 672nd JesseNoEyes 🇺🇸 772 92 9ms 17 Nov 2024 676th akshatj27 🇦🇶 771 61 42ms 11 Jan 2022 676th orthoplex 🇨🇽 771 61 38ms 1 Apr 2022 676th OhmNomNom 771 61 38ms 14 Oct 2022 676th Shanethegamer 🇺🇸 771 61 37ms 8 Apr 2023 676th tatzyr 🇯🇵 771 61 54ms 30 Mar 2025 681st LucaArgentiUCF 🇮🇹 771 112 41ms 14 Feb 2021 681st SirBogman 🇺🇸 771 112 39ms 4 Nov 2024 683rd ovs-code 🇩🇪 771 155 240ms 21 Apr 2025 684th sean-niemann 🇺🇸 770 79 4ms 30 Oct 2022 685th CaedenHarper 🇨🇦 770 147 393ms 21 Oct 2025 686th Yewzir 🇧🇪 768 162 2,711ms 3 Feb 2023 687th emgordon154 767 194 253ms 18 Jan 2025 688th kurkale6ka 766 73 3ms 17 Aug 2021 689th Alessandro-Balconi 🇮🇹 765 79 88ms 15 Jul 2023 690th emgordon154 765 109 8ms 10 Dec 2024 691st msbranicky 764 86 515ms 17 Jan 2024 692nd NewDefectus 🇮🇱 764 95 50ms 8 Jul 2021 693rd 5quiwyrm 763 74 267ms 9 Dec 2024 694th adoxography 763 93 10ms 8 Oct 2020 694th nullie 763 93 9ms 9 Jun 2022 694th julienlamoureux78 763 93 11ms 18 Aug 2022 694th CatsAreFluffy 763 93 10ms 21 Dec 2023 694th elgan65536 763 93 9ms 31 Mar 2024 694th Mikey-Beep 🇬🇧 763 93 10ms 2 Jun 2024 694th Papushkado 763 93 12ms 18 Nov 2025 701st StarmaQ 763 99 2ms 22 Jan 2021 701st edsrzf 🇳🇿 763 99 1ms 30 May 2025 703rd ovs-code 🇩🇪 763 124 142ms 28 Nov 2022 704th lynn 763 126 128ms 19 May 2021 705th msbranicky 763 195 263ms 31 Aug 2023 706th targrik 762 88 584ms 13 May 2025 707th DialFrost 🇸🇬 761 157 136ms 7 Nov 2025 708th Andriamanitra 🇫🇮 760 59 584ms 26 Jul 2023 709th kkoenig 759 196 264ms 7 Sep 2025 710th 2bular 758 46 3ms 24 Jun 2025 711th emgordon154 758 62 37ms 13 Nov 2021 711th KatieLG 🇬🇧 758 62 41ms 10 Apr 2022 711th jared-hughes 758 62 50ms 20 Sep 2022 714th janbehrens 🇩🇪 756 93 4ms 29 Oct 2021 715th bbakersmith 755 94 9ms 18 Jul 2021 715th jfallon1997 755 94 10ms 9 Aug 2022 715th wobblybits 755 94 9ms 19 Aug 2025 718th jared-hughes 754 165 3,451ms 24 Jun 2022 718th snyderek 🇺🇸 754 165 3,063ms 18 Dec 2024 720th prplz 🇦🇺 753 89 474ms 9 Oct 2021 First Prev 641–720 of 1,861 Next Last