The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Odious Numbers (Long) 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 721st emgordon154 851 88 258ms 17 Jan 2025 721st snoozingnewt 🇨🇦 851 88 276ms 25 Oct 2025 723rd Steffan153 🇫🇮 850 30 3ms 6 Mar 2023 724th Shanethegamer 🇺🇸 849 47 18ms 6 Sep 2022 724th KatieLG 🇬🇧 849 47 10ms 7 Sep 2022 724th Eilonlif 🇮🇱 849 47 17ms 7 Sep 2022 724th 051 🇸🇬 849 47 15ms 8 Sep 2022 724th suwat513 849 47 11ms 13 Sep 2022 724th QuincyNash 🇺🇸 849 47 10ms 6 Dec 2022 724th TaserTheFox 🇺🇸 849 47 16ms 9 Jan 2023 724th SirFireball3521 849 47 11ms 4 Feb 2023 724th quimey 849 47 9ms 22 Mar 2023 724th CedricGebistorf 849 47 9ms 4 May 2023 724th tri1212 🇻🇳 849 47 16ms 9 May 2023 724th rollershutter 849 47 9ms 24 Jun 2023 724th 2011-Chan-Ethan 849 47 10ms 6 Jul 2023 724th msbranicky 849 47 9ms 10 Jul 2023 724th Re-Adventures 🇮🇳 849 47 9ms 20 Jul 2023 724th Andriamanitra 🇫🇮 849 47 16ms 28 Jul 2023 724th 5cw 🇺🇸 849 47 10ms 1 Aug 2023 724th ListeriaM 849 47 9ms 25 Aug 2023 724th minhtrancccp 849 47 10ms 17 Oct 2023 724th m42km 849 47 9ms 21 Oct 2023 724th cros107 🇦🇺 849 47 16ms 26 Oct 2023 724th MichalMarsalek 🇨🇿 849 47 9ms 8 Nov 2023 724th boboquack 849 47 16ms 18 Nov 2023 724th dokutan 849 47 9ms 31 Dec 2023 724th jatloe 849 47 16ms 28 Jan 2024 724th NickTheEASDude 🇺🇸 849 47 16ms 1 Feb 2024 724th retrohun 849 47 10ms 29 Mar 2024 724th elgan65536 849 47 10ms 1 Apr 2024 724th Bulmenisaurus 849 47 9ms 8 Jul 2024 724th hellwue 849 47 16ms 4 Sep 2024 724th JunkIce 849 47 9ms 17 Sep 2024 724th lifthrasiir 🇰🇷 849 47 10ms 14 Nov 2024 724th itljan30 849 47 10ms 28 Jan 2025 724th vhoulbreque 🇫🇷 849 47 16ms 10 Feb 2025 724th souta-1326 849 47 16ms 25 Mar 2025 724th moustave 849 47 16ms 7 Apr 2025 724th nooby31415 849 47 10ms 18 Apr 2025 724th Inventor51 849 47 17ms 21 May 2025 724th jipsong 🇩🇪 849 47 11ms 24 May 2025 724th Flekay 🇩🇪 849 47 10ms 10 Jul 2025 724th dirckvdende 849 47 16ms 23 Jul 2025 724th YAJUE114514 849 47 10ms 30 Jul 2025 724th ApoChagi 849 47 9ms 11 Oct 2025 724th Lv0Sys 🇵🇱 849 47 11ms 10 days ago 724th yujh-yujh 🇬🇸 849 47 18ms 5 days ago 769th snoozingnewt 🇨🇦 848 43 38ms 6 days ago 770th luuumine 🇫🇷 847 44 9ms 28 Oct 2025 771st isaiah0311 846 57 2ms 16 Feb 2023 771st Babafaba 846 57 2ms 14 Oct 2025 773rd MeWhenI 🇻🇦 845 54 6ms 16 Jul 2023 773rd Steffan153 🇫🇮 845 54 6ms 16 Jul 2023 775th MeWhenI 🇻🇦 845 61 40ms 13 Feb 2025 776th CaedenHarper 🇨🇦 845 78 72ms 16 Nov 2025 777th yzhs 🇩🇪 844 59 128ms 21 Jun 2023 777th YAJUE114514 844 59 124ms 15 Jul 2025 779th fuzzylojik-golf 🇺🇸 843 41 666ms 22 Sep 2025 780th MichalMarsalek 🇨🇿 843 54 148ms 16 Dec 2022 780th steffan-polygolf 843 54 143ms 23 Feb 2023 780th dokutan 843 54 141ms 31 Dec 2023 780th snoozingnewt 🇨🇦 843 54 138ms 6 days ago 784th 386asm 🇺🇸 842 56 36ms 6 May 2023 784th albanian-laundromat 842 56 38ms 22 Aug 2025 786th Bubbler-4 842 67 120ms 6 Sep 2022 787th dokutan 841 72 25ms 6 Oct 2024 787th DialFrost 🇸🇬 841 72 25ms 23 Dec 2024 789th DialFrost 🇸🇬 841 124 1,675ms 13 Sep 2025 789th GolfingSuccess 🇬🇷 841 124 1,699ms 15 Sep 2025 789th primo-ppcg 🇹🇭 841 124 1,747ms 15 Sep 2025 789th dokutan 841 124 1,666ms 19 Oct 2025 789th Yewzir 🇧🇪 841 124 2,503ms 14 Nov 2025 794th Shanethegamer 🇺🇸 840 52 3,931ms 24 Oct 2024 794th Chinay-Domitrix 🇺🇸 840 52 3,899ms 24 Mar 2025 794th Briseglace 840 52 4,670ms 9 Apr 2025 794th dokutan 840 52 2,759ms 2 days ago 798th inventshah 839 52 2ms 9 Sep 2022 798th Yewzir 🇧🇪 839 52 2ms 29 Mar 2024 800th Steffan153 🇫🇮 839 65 78ms 10 Dec 2022 First Prev 721–800 of 2,509 Next Last