The Calendar hole will go live in approximately 9 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 234th fuzzylojik-golf 🇺🇸 976 28 3ms 10 Jul 2025 242nd Bubbler-4 974 28 33ms 19 Apr 2023 242nd ovs-code 🇩🇪 974 28 32ms 14 Nov 2025 244th sisyphus-ppcg 🇦🇺 973 34 50ms 22 Feb 2023 244th radarek 🇵🇱 973 34 36ms 3 May 2023 244th Lydxn 🇨🇦 973 34 36ms 23 Jun 2023 247th sisyphus-ppcg 🇦🇺 965 49 1ms 17 Jun 2021 247th Lydxn 🇨🇦 965 49 1ms 17 Jun 2021 247th HPWiz 🇳🇿 965 49 1ms 28 Jun 2021 247th prplz 🇦🇺 965 49 1ms 8 Jul 2021 247th JayXon 🇺🇸 965 49 1ms 5 Jan 2022 247th nwellnhof 🇩🇪 965 49 1ms 8 Aug 2022 247th saito-ta 🇯🇵 965 49 2ms 9 Aug 2022 247th Steffan153 🇫🇮 965 49 2ms 17 Nov 2022 247th inventshah 965 49 1ms 26 Jan 2023 247th sean-niemann 🇺🇸 965 49 2ms 11 Apr 2023 247th Alex-x90 🇺🇸 965 49 1ms 17 Jul 2023 247th rhdqor213 965 49 2ms 10 Aug 2023 247th JohandeRuiter 🇳🇱 965 49 2ms 22 Oct 2023 247th xsot 🇸🇬 965 49 1ms 22 May 2024 247th kaurakeksi 🇫🇮 965 49 2ms 30 Dec 2024 247th Mukundan314 965 49 1ms 28 Apr 2025 247th pardouin 🇫🇷 965 49 2ms 31 May 2025 247th fuzzylojik-golf 🇺🇸 965 49 2ms 14 Jul 2025 247th 09cf 965 49 2ms 25 days ago 247th KasperKivimaeki 🇫🇮 965 49 2ms 10 days ago 267th prplz 🇦🇺 963 33 914ms 23 Mar 2021 267th JayXon 🇺🇸 963 33 975ms 24 Mar 2021 267th primo-ppcg 🇹🇭 963 33 1,277ms 24 Mar 2021 267th sisyphus-ppcg 🇦🇺 963 33 919ms 3 Apr 2021 267th Shanethegamer 🇺🇸 963 33 826ms 28 May 2021 267th Lydxn 🇨🇦 963 33 921ms 11 Jun 2021 267th GrayJoKing 🇦🇺 963 33 1,138ms 8 Sep 2021 267th lynn 963 33 1,052ms 1 Jun 2022 267th SirBogman 🇺🇸 963 33 1,145ms 10 Aug 2022 267th Steffan153 🇫🇮 963 33 1,089ms 16 Dec 2022 267th stefangimmillaro 963 33 897ms 17 Dec 2022 267th sean-niemann 🇺🇸 963 33 870ms 4 Jan 2023 267th DialFrost 🇸🇬 963 33 947ms 18 Jan 2023 267th inventshah 963 33 1,047ms 27 Sep 2023 267th Yewzir 🇧🇪 963 33 1,119ms 6 Feb 2024 267th error256 963 33 916ms 29 Jul 2024 267th emgordon154 963 33 894ms 12 Nov 2024 267th pardouin 🇫🇷 963 33 1,052ms 13 Apr 2025 267th fuzzylojik-golf 🇺🇸 963 33 1,000ms 21 Aug 2025 267th snoozingnewt 🇨🇦 963 33 753ms 11 days ago 287th tjtnorton 962 45 9ms 29 Nov 2018 287th TFeld00 🇩🇰 962 45 9ms 25 Jun 2019 287th hoodadam 962 45 9ms 19 Sep 2019 287th marcin7Cd 962 45 9ms 15 Mar 2020 287th retrohun 962 45 10ms 4 May 2020 287th dim-an 962 45 9ms 7 Dec 2020 287th nwellnhof 🇩🇪 962 45 9ms 31 Dec 2020 287th neihousaigaai 962 45 9ms 22 Mar 2021 287th NewDefectus 🇮🇱 962 45 9ms 8 May 2021 287th GrayJoKing 🇦🇺 962 45 28ms 8 Sep 2021 287th annaproxy 962 45 9ms 24 Dec 2021 287th inventshah 962 45 9ms 27 Apr 2022 287th jared-hughes 962 45 9ms 13 Aug 2022 287th stefangimmillaro 962 45 9ms 30 Sep 2022 287th MeWhenI 🇻🇦 962 45 9ms 10 Oct 2022 287th bricknellj 962 45 9ms 21 Oct 2022 287th Shanethegamer 🇺🇸 962 45 9ms 8 Mar 2023 287th SirBogman 🇺🇸 962 45 9ms 10 Jan 2024 287th Grrisly 962 45 9ms 25 Mar 2024 287th duckyluuk 🇳🇱 962 45 9ms 28 Mar 2024 287th HETHAT 🇩🇿 962 45 9ms 11 Apr 2024 287th Yewzir 🇧🇪 962 45 11ms 4 Jun 2024 287th emgordon154 962 45 9ms 7 Aug 2024 287th alemelis 962 45 9ms 26 Sep 2024 287th nullie 962 45 10ms 17 Dec 2024 287th Bulmenisaurus 962 45 9ms 6 Feb 2025 287th Mukundan314 962 45 9ms 25 Apr 2025 287th KasperKivimaeki 🇫🇮 962 45 10ms 30 Jun 2025 287th wuduculfre 962 45 9ms 22 Jul 2025 287th edsrzf 🇳🇿 962 45 9ms 26 Jul 2025 287th albanian-laundromat 962 45 10ms 19 Aug 2025 287th KatieLG 🇬🇧 962 45 9ms 3 Oct 2025 287th 09cf 962 45 12ms 25 days ago 287th snoozingnewt 🇨🇦 962 45 9ms 18 days ago First Prev 241–320 of 4,138 Next Last