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 chars. 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 Chars Time Submitted 790th rucin93 🇵🇱 869 114 590ms 12 Mar 2025 790th albanian-laundromat 869 114 434ms 10 Jul 2025 790th snoozingnewt 🇨🇦 869 114 481ms 10 days ago 804th marcin7Cd 868 114 10ms 12 Oct 2020 804th Attero 🇸🇪 868 114 9ms 12 Oct 2020 804th sisyphus-ppcg 🇦🇺 868 114 10ms 30 May 2021 804th SirBogman 🇺🇸 868 114 10ms 28 Nov 2021 804th ovs-code 🇩🇪 868 114 10ms 22 Apr 2022 804th jmerle 🇳🇱 868 114 9ms 19 Jun 2023 810th lifthrasiir 🇰🇷 867 15 2ms 28 Nov 2024 811th Yax42 🇫🇷 867 54 2ms 15 Oct 2025 812th janlelis 866 29 35ms 5 Jan 2020 812th OhmNomNom 866 29 33ms 30 Oct 2022 812th Shanethegamer 🇺🇸 866 29 34ms 22 Mar 2023 812th xsot 🇸🇬 866 29 36ms 25 May 2023 812th Natanaelel 🇸🇪 866 29 33ms 14 Mar 2024 812th fuzzylojik-golf 🇺🇸 866 29 35ms 29 Aug 2025 818th Lydxn 🇨🇦 866 39 1ms 8 Oct 2023 818th GrayJoKing 🇦🇺 866 39 1ms 9 Oct 2023 818th Steffan153 🇫🇮 866 39 2ms 9 Oct 2023 821st fuzzylojik-golf 🇺🇸 866 64 404ms 6 Aug 2025 822nd GrayJoKing 🇦🇺 865 43 3ms 16 Jul 2023 822nd fuzzylojik-golf 🇺🇸 865 43 3ms 24 Sep 2025 824th sisyphus-ppcg 🇦🇺 864 38 380ms 17 Jan 2024 825th dokutan 862 39 650ms 30 Aug 2025 825th CaedenHarper 🇨🇦 862 39 661ms 9 Sep 2025 825th albanian-laundromat 862 39 649ms 12 Sep 2025 825th edsrzf 🇳🇿 862 39 646ms 13 Sep 2025 825th pardouin 🇫🇷 862 39 667ms 17 days ago 830th CaedenHarper 🇨🇦 862 86 243ms 12 Dec 2024 830th 0xjac 🇨🇭 862 86 259ms 17 Jun 2025 832nd retrohun 861 38 2ms 22 Mar 2019 832nd sisyphus-ppcg 🇦🇺 861 38 1ms 19 Jan 2022 834th janbehrens 🇩🇪 860 74 66ms 8 Jan 2022 835th KatieLG-Transpiler 🇬🇧 860 115 9ms 24 Jun 2022 836th GrayJoKing 🇦🇺 858 69 24ms 8 Jul 2021 836th Laksen 🇩🇰 858 69 24ms 8 Jul 2021 836th gidHog 858 69 25ms 20 Nov 2023 836th ben-j-herbertz 858 69 24ms 21 Nov 2023 836th dpethes 858 69 25ms 7 days ago 841st targrik 857 41 5ms 2 days ago 842nd nwellnhof 🇩🇪 856 27 230ms 26 Nov 2022 842nd IISResetMe 856 27 243ms 1 Jul 2023 842nd SirBogman 🇺🇸 856 27 216ms 5 Jan 2024 842nd dcgjb 856 27 231ms 24 Jan 2024 842nd DialFrost 🇸🇬 856 27 234ms 6 Jun 2024 842nd Steffan153 🇫🇮 856 27 231ms 7 Aug 2024 842nd juliansiebert 🇩🇪 856 27 230ms 2 Feb 2025 842nd sean-niemann 🇺🇸 856 27 239ms 25 Mar 2025 842nd bitsandbeyond 🇳🇱 856 27 266ms 13 Oct 2025 851st sisyphus-ppcg 🇦🇺 856 31 357ms 10 Feb 2021 852nd clockworknazo 856 46 3ms 29 Sep 2022 852nd Lydxn 🇨🇦 856 46 3ms 29 Sep 2022 854th Andriamanitra 🇫🇮 855 32 994ms 28 Jul 2023 854th dokutan 855 32 947ms 30 Apr 2024 856th Shanethegamer 🇺🇸 855 47 68ms 16 May 2022 856th GrayJoKing 🇦🇺 855 47 70ms 21 May 2022 856th Steffan153 🇫🇮 855 47 72ms 8 Oct 2022 856th Yewzir 🇧🇪 855 47 71ms 9 Nov 2023 856th Betuaredead 855 47 69ms 13 Nov 2023 856th pardouin 🇫🇷 855 47 65ms 3 Sep 2024 856th sean-niemann 🇺🇸 855 47 66ms 18 Apr 2025 856th albanian-laundromat 855 47 64ms 2 Oct 2025 856th snoozingnewt 🇨🇦 855 47 62ms 11 days ago 865th NewDefectus 🇮🇱 854 42 9ms 10 Feb 2021 865th Shingyx 854 42 9ms 11 Apr 2021 865th pcomerford 854 42 8ms 12 Jun 2022 865th Shanethegamer 🇺🇸 854 42 8ms 22 Mar 2023 865th duckyluuk 🇳🇱 854 42 9ms 4 Oct 2024 865th luuumine 🇫🇷 854 42 9ms 28 Oct 2025 865th JOrE20 🇺🇸 854 42 9ms 5 days ago 872nd stefangimmillaro 854 44 3,503ms 28 Oct 2024 873rd LucaArgentiUCF 🇮🇹 853 42 38ms 14 Feb 2021 873rd snoozingnewt 🇨🇦 853 42 40ms 6 days ago 875th Shanethegamer 🇺🇸 852 43 1ms 22 Mar 2023 875th Babafaba 852 43 2ms 11 Oct 2025 877th Sakaala 852 46 16ms 23 Apr 2019 877th KatieLG 🇬🇧 852 46 9ms 26 Oct 2020 877th rak1507 🇬🇧 852 46 15ms 10 May 2021 877th clementblaudeau 852 46 15ms 28 May 2021 First Prev 801–880 of 4,042 Next Last