The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Odious 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 799th janbehrens 🇩🇪 884 53 2ms 26 Sep 2020 799th Irratix 🇳🇱 884 53 1ms 9 Oct 2020 799th inventshah 884 53 33ms 8 May 2021 799th m-tkach 🇺🇦 884 53 1ms 5 Oct 2021 799th MeWhenI 🇻🇦 884 53 5ms 13 Oct 2021 799th solmyr2000 884 53 1ms 20 Jun 2022 799th michael-pruglo 🇺🇦 884 53 3ms 14 Jul 2022 799th Alex-x90 🇺🇸 884 53 1ms 29 Jul 2022 799th jared-hughes 884 53 1ms 8 Sep 2022 799th AlephSquirrel 884 53 1ms 7 Jan 2023 799th Yewzir 🇧🇪 884 53 1ms 14 Oct 2023 799th JohandeRuiter 🇳🇱 884 53 2ms 6 Nov 2023 799th Betuaredead 884 53 1ms 11 Nov 2023 799th Mandrzejy 🇵🇱 884 53 1ms 14 Apr 2024 799th pardouin 🇫🇷 884 53 1ms 23 Aug 2024 799th emgordon154 884 53 1ms 25 Nov 2024 817th JOrE20 🇺🇸 884 67 25ms 5 days ago 818th primo-ppcg 🇹🇭 884 73 71ms 18 Jan 2022 818th 09cf 884 73 62ms 23 days ago 820th Irratix 🇳🇱 882 31 943ms 25 Mar 2021 820th MeWhenI 🇻🇦 882 31 841ms 5 Aug 2023 820th anter69 🇭🇺 882 31 1,023ms 10 Mar 2025 823rd Yax42 🇫🇷 882 64 425ms 10 Oct 2025 823rd Babafaba 882 64 442ms 11 Oct 2025 825th sean-niemann 🇺🇸 879 65 362ms 12 Dec 2023 825th JayXon 🇺🇸 879 65 364ms 19 Nov 2025 827th yzhs 🇩🇪 878 21 33ms 21 Jan 2020 827th RustemB 🇷🇺 878 21 33ms 10 Apr 2021 827th Yewzir 🇧🇪 878 21 34ms 26 Dec 2023 830th prplz 🇦🇺 878 40 4ms 19 May 2021 830th GrayJoKing 🇦🇺 878 40 4ms 19 May 2021 830th emplv 🇱🇻 878 40 4ms 1 Oct 2021 830th Shanethegamer 🇺🇸 878 40 4ms 15 Apr 2022 830th Steffan153 🇫🇮 878 40 4ms 6 Aug 2024 835th Yax42 🇫🇷 878 59 352ms 31 May 2025 836th Shanethegamer 🇺🇸 878 62 185ms 15 Apr 2025 836th emgordon154 878 62 111ms 21 days ago 836th DialFrost 🇸🇬 878 62 132ms 21 days ago 836th GolfingSuccess 🇬🇷 878 62 98ms 21 days ago 836th edsrzf 🇳🇿 878 62 105ms 20 days ago 836th snoozingnewt 🇨🇦 878 62 102ms 18 days ago 836th sean-niemann 🇺🇸 878 62 97ms 11 days ago 843rd sisyphus-ppcg 🇦🇺 876 44 101ms 10 Jun 2021 843rd Shanethegamer 🇺🇸 876 44 94ms 22 Mar 2023 845th igmcdowell 875 41 9ms 4 Jan 2022 845th MWI-polygolf 875 41 8ms 6 Dec 2023 845th targrik 875 41 8ms 14 Feb 2025 848th GrayJoKing 🇦🇺 875 48 3ms 10 Sep 2022 848th Shanethegamer 🇺🇸 875 48 2ms 22 Mar 2023 848th Babafaba 875 48 2ms 11 Oct 2025 851st Shanethegamer 🇺🇸 875 113 12ms 1 Aug 2023 851st Lydxn 🇨🇦 875 113 10ms 1 Aug 2023 851st MeWhenI 🇻🇦 875 113 9ms 1 Aug 2023 851st JayXon 🇺🇸 875 113 10ms 2 Aug 2023 851st Steffan153 🇫🇮 875 113 10ms 2 Aug 2023 851st GolfingSuccess 🇬🇷 875 113 10ms 2 Aug 2023 851st janbehrens 🇩🇪 875 113 9ms 2 Aug 2023 851st GrayJoKing 🇦🇺 875 113 9ms 11 Aug 2023 851st BREMAUCY 🇫🇷 875 113 9ms 7 Sep 2023 851st lynn 875 113 9ms 17 Oct 2023 851st dokutan 875 113 9ms 20 Oct 2023 851st Yewzir 🇧🇪 875 113 9ms 12 Mar 2024 851st rucin93 🇵🇱 875 113 10ms 10 May 2024 851st HumanoidCPU 875 113 10ms 18 May 2024 851st pardouin 🇫🇷 875 113 10ms 20 Aug 2024 851st KatieLG 🇬🇧 875 113 10ms 26 Sep 2024 851st emgordon154 875 113 10ms 4 Dec 2024 851st CaedenHarper 🇨🇦 875 113 10ms 24 Jan 2025 851st albanian-laundromat 875 113 10ms 20 Jul 2025 851st Babafaba 875 113 10ms 24 Oct 2025 851st snoozingnewt 🇨🇦 875 113 10ms 13 days ago 872nd sisyphus-ppcg 🇦🇺 874 36 74ms 12 Dec 2022 873rd CaedenHarper 🇨🇦 873 86 243ms 12 Dec 2024 873rd 0xjac 🇨🇭 873 86 259ms 17 Jun 2025 875th JayXon 🇺🇸 873 117 1,666ms 15 Sep 2025 876th janbehrens 🇩🇪 872 74 66ms 8 Jan 2022 877th sk- 871 45 9ms 11 Sep 2019 877th urojony 🇵🇱 871 45 9ms 27 Dec 2020 877th Shanethegamer 🇺🇸 871 45 9ms 22 Mar 2023 877th namelessiw 871 45 10ms 5 Mar 2024 First Prev 801–880 of 4,071 Next Last