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 801st ertz1ertz 712 159 403ms 14 Aug 2024 802nd CatsAreFluffy 711 102 51ms 24 Feb 2023 803rd stefangimmillaro 710 99 2,743ms 18 Oct 2023 804th EwanSkene 710 100 12ms 3 Sep 2020 804th boxjelly 710 100 10ms 14 Feb 2021 804th PhysicDev 🇫🇷 710 100 11ms 16 Mar 2022 804th wen1now 710 100 9ms 6 Nov 2023 804th Alban-Boissard 710 100 9ms 14 Jun 2025 804th TheZwierzLF 🇵🇱 710 100 13ms 3 days ago 810th stefangimmillaro 710 139 2,255ms 18 Oct 2023 811th DialFrost 🇸🇬 708 137 2ms 9 Mar 2025 812th billings7 🇬🇧 708 160 414ms 22 May 2024 813th MeWhenI 🇻🇦 708 210 268ms 9 Feb 2023 814th CatsAreFluffy 707 93 506ms 15 Jan 2024 815th Betuaredead 707 176 2,838ms 13 Jan 2023 816th tayloia 🇬🇧 706 95 9ms 26 May 2022 816th dmrichwa 🇺🇸 706 95 10ms 4 Oct 2022 816th voytxt 🇨🇿 706 95 8ms 17 Jul 2024 819th NewDefectus 🇮🇱 706 134 146ms 18 Feb 2021 820th jameslindesay 703 101 40ms 25 Feb 2021 820th galloj 🇨🇿 703 101 11ms 21 Aug 2022 820th Acky-Acky 703 101 10ms 9 May 2024 823rd michelebastione 🇮🇹 703 161 428ms 20 Jul 2024 824th btjones0 703 170 217ms 31 Dec 2020 825th Lv0Sys 🇵🇱 702 67 42ms 17 days ago 826th MeWhenI 🇻🇦 702 139 566ms 4 Mar 2022 827th snoozingnewt 🇨🇦 701 93 755ms 13 Oct 2025 828th snoozingnewt 🇨🇦 701 119 12ms 13 Oct 2025 829th Yewzir 🇧🇪 700 64 778ms 28 Feb 2024 830th snoozingnewt 🇨🇦 700 114 3ms 13 Oct 2025 831st GolfingSuccess 🇬🇷 700 151 2ms 26 Oct 2023 832nd albanian-laundromat 699 87 3ms 14 days ago 833rd cywong-amino 🇭🇰 698 96 9ms 7 Oct 2020 833rd jared-hughes 698 96 9ms 29 Oct 2021 833rd KrausRaus 🇺🇸 698 96 10ms 21 Dec 2021 833rd Shanethegamer 🇺🇸 698 96 9ms 10 Mar 2022 833rd zakariamouhid 698 96 9ms 21 Jun 2023 833rd Maznek 698 96 72ms 10 Jul 2023 833rd two-bad 🇬🇧 698 96 9ms 6 Feb 2024 840th lifthrasiir 🇰🇷 697 50 2ms 28 Nov 2024 841st HCRitter 🇩🇪 697 81 321ms 31 Oct 2023 842nd AlephSquirrel 697 107 4ms 20 Apr 2023 843rd Shanethegamer 🇺🇸 696 101 4ms 6 Apr 2023 844th findegil 696 102 9ms 26 Aug 2020 844th austinrwarner 696 102 11ms 25 Dec 2020 844th Omega65536 🇩🇪 696 102 17ms 6 Jan 2021 844th jhpaques 🇫🇷 696 102 13ms 29 Jul 2022 844th jamesthekee 696 102 9ms 25 Jan 2025 849th vgamula 🇺🇦 695 167 30ms 25 Jan 2024 850th m-tkach 🇺🇦 693 109 2ms 4 Feb 2024 851st TheZwierzLF 🇵🇱 692 95 599ms 3 days ago 852nd PatrickStephansen 🇿🇦 691 97 9ms 10 Sep 2020 852nd alasdair-greenland 691 97 9ms 19 Nov 2021 852nd nakatchi 691 97 9ms 27 Feb 2024 852nd SadiinsoSnowfall 🇫🇷 691 97 9ms 7 Mar 2024 856th DialFrost 🇸🇬 691 139 117ms 10 Nov 2025 857th Andriamanitra 🇫🇮 690 108 4ms 13 Jun 2024 858th atazzam 🇺🇸 689 103 13ms 2 Apr 2022 858th vishwathg 689 103 9ms 21 Aug 2022 858th fredrik-bakke 🇳🇴 689 103 10ms 2 Oct 2022 858th willschremmer 689 103 9ms 28 Apr 2024 858th wuzekai518 689 103 10ms 23 Jul 2024 858th Mabeloid 🇳🇴 689 103 9ms 22 Sep 2024 858th WillowWispy 689 103 10ms 17 Mar 2025 865th CaedenHarper 🇨🇦 689 216 268ms 12 Nov 2025 866th Shanethegamer 🇺🇸 688 116 2ms 2 Mar 2023 867th MeWhenI 🇻🇦 686 90 873ms 12 May 2023 868th tigerdan2 🇩🇪 685 179 484ms 21 days ago 869th janlelis 684 98 9ms 10 Feb 2021 869th nathanadams 🇳🇿 684 98 9ms 18 Aug 2021 869th weliveinhell 🇭🇹 684 98 10ms 23 Oct 2023 872nd bac0id 684 182 2,967ms 11 Jan 2025 873rd Attero 🇸🇪 683 69 328ms 18 Oct 2020 874th ydevor 🇮🇱 683 104 9ms 10 Mar 2021 874th Fishron 683 104 13ms 19 Oct 2021 876th WhoisDavid 683 175 211ms 11 Oct 2020 877th arctouch-cristiannevianna 682 166 340ms 15 Jun 2023 878th Msleizak 🇫🇷 680 83 3,624ms 12 Dec 2023 878th snoozingnewt 🇨🇦 680 83 240ms 13 Oct 2025 880th Ripick 680 122 165ms 23 May 2025 First Prev 801–880 of 1,862 Next Last