The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Niven 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 638th zbreit 🇺🇸 941 46 9ms 4 Apr 2019 638th petar-donchev 941 46 9ms 24 Aug 2019 638th daedals 941 46 9ms 15 Oct 2019 638th teafork 941 46 9ms 9 Feb 2020 638th andersk 🇺🇸 941 46 10ms 19 Mar 2020 638th Attero 🇸🇪 941 46 9ms 26 Mar 2020 638th dmoa 941 46 9ms 10 Jul 2020 638th hashkitten 941 46 9ms 24 Sep 2020 638th Dazza314 🇬🇧 941 46 9ms 7 Nov 2020 638th janbehrens 🇩🇪 941 46 9ms 8 Dec 2020 638th btjones0 941 46 9ms 27 Dec 2020 638th OllieBoyne 🇬🇧 941 46 9ms 6 Feb 2021 638th vezzick 941 46 10ms 5 Mar 2021 638th RDShah 941 46 9ms 15 Apr 2021 638th urojony 🇵🇱 941 46 9ms 27 May 2021 638th MarcMush 🇫🇷 941 46 9ms 29 Jun 2021 638th Fishron 941 46 9ms 19 Oct 2021 638th Indivicivet 941 46 9ms 24 Oct 2021 638th StefanHabel 🇨🇦 941 46 9ms 14 Dec 2021 638th ZakkkkAttackkkk 🇵🇭 941 46 9ms 20 Dec 2021 638th Irratix 🇳🇱 941 46 9ms 17 Apr 2022 638th k3w1k0d3r 941 46 9ms 25 Jun 2022 638th 051 🇸🇬 941 46 9ms 8 Aug 2022 638th TobyBoyne 🇬🇧 941 46 9ms 12 Aug 2022 638th MichalMarsalek 🇨🇿 941 46 9ms 29 Aug 2022 638th JaimeCoderIO 941 46 9ms 29 Sep 2022 638th IshanPanpaliya 941 46 9ms 19 Oct 2022 638th FlorianCassayre 🇫🇷 941 46 9ms 6 Nov 2022 638th thehylian 941 46 9ms 30 Dec 2022 638th Techdude01 941 46 9ms 18 Jan 2023 638th SirFireball3521 941 46 9ms 9 Feb 2023 638th scpchicken 🇵🇼 941 46 9ms 22 Feb 2023 638th kellantech 941 46 10ms 2 Jun 2023 638th lillian314159 941 46 9ms 13 Jul 2023 638th Alex-x90 🇺🇸 941 46 9ms 17 Jul 2023 638th AlexanderFair 941 46 9ms 24 Jul 2023 638th gXLg 🇩🇪 941 46 9ms 23 Sep 2023 638th ridingqwerty 🇺🇸 941 46 9ms 22 Dec 2023 638th bzijlema 🇳🇱 941 46 9ms 12 Jan 2024 638th jhu04 941 46 9ms 18 Jan 2024 638th bob-th 941 46 9ms 2 Feb 2024 638th Bmrl7 941 46 9ms 21 Feb 2024 638th elgan65536 941 46 9ms 5 Mar 2024 638th Lewenhaupt 941 46 9ms 22 Mar 2024 638th jmfk 941 46 9ms 22 Mar 2024 638th jtaxen 941 46 9ms 5 Apr 2024 638th dokutan 941 46 9ms 30 Apr 2024 638th 5cw 🇺🇸 941 46 10ms 5 May 2024 638th bizy-coder 941 46 10ms 15 Aug 2024 638th jatloe 941 46 9ms 26 Aug 2024 638th croc54 941 46 9ms 18 Nov 2024 638th lifthrasiir 🇰🇷 941 46 9ms 3 Dec 2024 638th andrewjc2000 941 46 9ms 3 Mar 2025 638th plcc0 941 46 9ms 5 Mar 2025 638th keelimeguy 🇺🇸 941 46 9ms 6 May 2025 638th Artemis21 🇬🇧 941 46 9ms 23 May 2025 638th dirckvdende 941 46 9ms 20 Jul 2025 638th qpwoeirut 941 46 9ms 13 Aug 2025 638th InigoK 🇺🇸 941 46 9ms 8 Sep 2025 638th blaztoma 🇱🇹 941 46 9ms 15 Sep 2025 638th ahmetdemirag 🇨🇾 941 46 9ms 1 Oct 2025 638th luuumine 🇫🇷 941 46 9ms 17 Oct 2025 638th butnaruteodor 941 46 9ms 30 Oct 2025 638th CommandLeo 🇮🇹 941 46 10ms 15 Nov 2025 638th Languag3 941 46 9ms 18 days ago 638th zgialor-lab 941 46 14ms 6 days ago 707th primo-ppcg 🇹🇭 940 29 35ms 7 Oct 2020 707th stackofbears 940 29 35ms 14 Mar 2025 707th 2bular 940 29 32ms 29 Oct 2025 710th AdrienHache 🇫🇷 940 41 52ms 12 Sep 2024 711th Steffan153 🇫🇮 940 42 121ms 4 Aug 2024 711th sean-niemann 🇺🇸 940 42 122ms 4 Aug 2024 711th JayXon 🇺🇸 940 42 121ms 4 Aug 2024 711th DialFrost 🇸🇬 940 42 125ms 4 Aug 2024 711th Lydxn 🇨🇦 940 42 126ms 5 Aug 2024 711th sisyphus-ppcg 🇦🇺 940 42 120ms 6 Aug 2024 711th MeWhenI 🇻🇦 940 42 123ms 6 Aug 2024 711th GrayJoKing 🇦🇺 940 42 122ms 6 Aug 2024 711th rucin93 🇵🇱 940 42 124ms 6 Aug 2024 711th lukegustafson 🇺🇸 940 42 123ms 7 Aug 2024 First Prev 641–720 of 4,132 Next Last