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 287th ryyyn 🇺🇸 962 45 10ms 14 days ago 287th AdrienHache 🇫🇷 962 45 10ms 4 days ago 323rd HPWiz 🇳🇿 960 37 494ms 17 Nov 2020 323rd JayXon 🇺🇸 960 37 589ms 25 Feb 2021 323rd Lydxn 🇨🇦 960 37 555ms 16 Jun 2021 323rd prplz 🇦🇺 960 37 540ms 19 Jan 2022 323rd antimon2 🇯🇵 960 37 560ms 18 Aug 2022 323rd GrayJoKing 🇦🇺 960 37 485ms 17 Nov 2022 323rd Steffan153 🇫🇮 960 37 571ms 17 Nov 2022 323rd DialFrost 🇸🇬 960 37 539ms 14 Jan 2023 323rd sean-niemann 🇺🇸 960 37 466ms 17 Jan 2023 323rd sisyphus-ppcg 🇦🇺 960 37 630ms 24 Jan 2023 323rd tidalDisruptionEvent 🇨🇦 960 37 689ms 24 Mar 2023 323rd ovs-code 🇩🇪 960 37 585ms 24 Oct 2023 323rd Yewzir 🇧🇪 960 37 485ms 15 Nov 2023 323rd Shanethegamer 🇺🇸 960 37 499ms 10 Dec 2023 323rd pardouin 🇫🇷 960 37 447ms 14 Sep 2024 323rd alemelis 960 37 510ms 26 Sep 2024 323rd twolfive 960 37 528ms 5 Oct 2024 340th primo-ppcg 🇹🇭 959 42 7ms 11 May 2018 340th sisyphus-ppcg 🇦🇺 959 42 6ms 17 Jun 2021 340th Lydxn 🇨🇦 959 42 6ms 7 Apr 2022 340th xsot 🇸🇬 959 42 7ms 23 May 2025 340th targrik 959 42 8ms 25 days ago 340th KasperKivimaeki 🇫🇮 959 42 6ms 12 days ago 346th primo-ppcg 🇹🇭 957 39 9ms 1 Mar 2021 346th GrayJoKing 🇦🇺 957 39 14ms 8 Sep 2021 348th Natanaelel 🇸🇪 955 22 57ms 24 Jul 2022 348th SirBogman 🇺🇸 955 22 40ms 10 Sep 2022 348th 5quiwyrm 955 22 58ms 4 Nov 2022 348th 5cw 🇺🇸 955 22 2ms 10 Apr 2023 348th GolfingSuccess 🇬🇷 955 22 2ms 19 Mar 2025 353rd alexkunin 955 43 9ms 3 Jul 2019 353rd Mazn3k 955 43 8ms 9 Sep 2021 353rd SpareManiKatti 955 43 9ms 11 Sep 2021 353rd jared-hughes 955 43 8ms 13 Aug 2022 353rd AlephSquirrel 955 43 8ms 12 Jan 2023 353rd ejini6969 955 43 9ms 25 Mar 2023 353rd Babafaba 955 43 9ms 30 Oct 2025 360th sisyphus-ppcg 🇦🇺 953 33 4ms 12 Aug 2024 360th ovs-code 🇩🇪 953 33 4ms 20 Aug 2024 360th emgordon154 953 33 4ms 15 Nov 2024 363rd marcin7Cd 953 52 113ms 15 Mar 2020 363rd primo-ppcg 🇹🇭 953 52 110ms 25 Apr 2020 363rd henkma 953 52 114ms 14 Jun 2020 363rd prplz 🇦🇺 953 52 111ms 18 Oct 2020 363rd HPWiz 🇳🇿 953 52 116ms 12 Nov 2020 363rd JayXon 🇺🇸 953 52 114ms 18 Feb 2021 363rd lynn 953 52 113ms 22 Mar 2021 363rd Lydxn 🇨🇦 953 52 113ms 22 Mar 2021 363rd kops-cg 953 52 111ms 7 Apr 2021 363rd xnor-gate 953 52 111ms 9 Jun 2021 363rd ssiquoya 🇷🇺 953 52 109ms 11 Jun 2021 363rd GrayJoKing 🇦🇺 953 52 117ms 7 Oct 2021 363rd annaproxy 953 52 119ms 24 Dec 2021 363rd ovs-code 🇩🇪 953 52 114ms 16 Feb 2022 363rd Steffan153 🇫🇮 953 52 117ms 20 Nov 2022 363rd Shanethegamer 🇺🇸 953 52 115ms 8 Mar 2023 363rd sean-niemann 🇺🇸 953 52 111ms 4 Jul 2023 363rd Sakisan 🇧🇪 953 52 115ms 16 Jul 2023 363rd btnlq 953 52 113ms 14 Oct 2023 363rd Yewzir 🇧🇪 953 52 118ms 20 Nov 2023 363rd DialFrost 🇸🇬 953 52 116ms 4 Aug 2024 363rd pardouin 🇫🇷 953 52 116ms 21 Aug 2024 363rd fuzzylojik-golf 🇺🇸 953 52 115ms 27 Aug 2025 363rd albanian-laundromat 953 52 116ms 4 Oct 2025 363rd snoozingnewt 🇨🇦 953 52 120ms 17 days ago 363rd edsrzf 🇳🇿 953 52 164ms 43 hours ago 389th billings7 🇬🇧 953 60 322ms 21 Nov 2021 389th JayXon 🇺🇸 953 60 324ms 21 Nov 2021 389th Lydxn 🇨🇦 953 60 321ms 21 Nov 2021 389th nwellnhof 🇩🇪 953 60 318ms 21 Nov 2021 389th ovs-code 🇩🇪 953 60 313ms 21 Nov 2021 389th primo-ppcg 🇹🇭 953 60 320ms 21 Nov 2021 389th prplz 🇦🇺 953 60 316ms 21 Nov 2021 389th ScottHamper 953 60 320ms 21 Nov 2021 389th sisyphus-ppcg 🇦🇺 953 60 317ms 21 Nov 2021 389th ssiquoya 🇷🇺 953 60 324ms 21 Nov 2021 389th GrayJoKing 🇦🇺 953 60 319ms 14 Mar 2022 389th annaproxy 953 60 324ms 15 Mar 2022 First Prev 321–400 of 4,132 Next Last