The Calendar hole will go live in approximately 5 days. Why not try and solve it ahead of time?
Niven Numbers (Long) 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 147th helbling 🇨🇭 964 50 12ms 17 Aug 2025 147th fuzzylojik-golf 🇺🇸 964 50 14ms 20 hours ago 163rd Lydxn 🇨🇦 959 38 3,959ms 6 Jan 2024 163rd JayXon 🇺🇸 959 38 468ms 16 Apr 2024 165th hallvabo 🇳🇴 959 51 13ms 8 Aug 2022 165th HelloGravity 959 51 14ms 22 Aug 2022 165th idoweinstein 959 51 15ms 23 Aug 2022 165th mrnomm 959 51 15ms 23 Aug 2022 165th orthoplex 🇨🇽 959 51 15ms 2 Oct 2022 165th Shanethegamer 🇺🇸 959 51 14ms 15 Apr 2023 165th ovs-code 🇩🇪 959 51 14ms 15 Apr 2023 165th MeWhenI 🇻🇦 959 51 15ms 15 Apr 2023 165th Steffan153 🇫🇮 959 51 14ms 23 Apr 2023 165th AlephSquirrel 959 51 15ms 23 Apr 2023 165th stefangimmillaro 959 51 14ms 8 Sep 2023 165th xsot 🇸🇬 959 51 14ms 23 Sep 2023 165th Bulmenisaurus 959 51 14ms 21 Jul 2024 165th kg583 🇺🇸 959 51 13ms 28 Jul 2024 165th DialFrost 🇸🇬 959 51 14ms 12 Apr 2025 165th zacjl 959 51 13ms 27 Apr 2025 165th CaedenHarper 🇨🇦 959 51 15ms 18 days ago 165th bizy-coder 959 51 15ms 18 days ago 165th Mukundan314 959 51 14ms 11 days ago 165th CornerMercury 🇬🇧 959 51 14ms 10 days ago 185th 5cw 🇺🇸 958 24 3ms 9 Apr 2023 186th JayXon 🇺🇸 952 41 447ms 8 Aug 2022 186th Lydxn 🇨🇦 952 41 410ms 8 Aug 2022 186th antimon2 🇯🇵 952 41 406ms 18 Aug 2022 186th Steffan153 🇫🇮 952 41 389ms 17 Nov 2022 186th DialFrost 🇸🇬 952 41 427ms 17 Nov 2022 186th GrayJoKing 🇦🇺 952 41 437ms 17 Nov 2022 186th sean-niemann 🇺🇸 952 41 459ms 4 Jan 2023 186th HPWiz 🇳🇿 952 41 431ms 18 Mar 2023 186th tidalDisruptionEvent 🇨🇦 952 41 489ms 22 Mar 2023 186th alemelis 952 41 470ms 22 Mar 2023 186th Andriamanitra 🇫🇮 952 41 451ms 8 Jul 2023 186th ovs-code 🇩🇪 952 41 416ms 24 Oct 2023 186th Yewzir 🇧🇪 952 41 464ms 15 Nov 2023 186th MarcMush 🇫🇷 952 41 419ms 15 Nov 2023 186th error256 952 41 447ms 22 Sep 2024 186th pardouin 🇫🇷 952 41 425ms 4 Oct 2024 186th twolfive 952 41 400ms 5 Oct 2024 186th Shanethegamer 🇺🇸 952 41 478ms 21 Apr 2025 204th HPWiz 🇳🇿 949 34 17ms 8 Aug 2022 204th MeWhenI 🇻🇦 949 34 17ms 18 Feb 2025 206th SirBogman 🇺🇸 948 28 175ms 8 Aug 2022 206th MeWhenI 🇻🇦 948 28 177ms 31 Jan 2023 206th DialFrost 🇸🇬 948 28 216ms 6 Feb 2023 206th SirFireball3521 948 28 177ms 8 Mar 2023 206th Yewzir 🇧🇪 948 28 178ms 18 Nov 2023 206th pardouin 🇫🇷 948 28 175ms 22 Aug 2024 212th sisyphus-ppcg 🇦🇺 948 62 4ms 15 days ago 213th GrayJoKing 🇦🇺 947 49 348ms 15 Jan 2024 213th Lydxn 🇨🇦 947 49 402ms 15 Jan 2024 213th sisyphus-ppcg 🇦🇺 947 49 343ms 16 Jan 2024 213th JayXon 🇺🇸 947 49 348ms 17 Jan 2024 213th m-tkach 🇺🇦 947 49 364ms 20 Jan 2024 213th lynn 947 49 365ms 17 Feb 2024 213th pardouin 🇫🇷 947 49 365ms 21 Jun 2024 213th sean-niemann 🇺🇸 947 49 365ms 21 Jan 2025 213th fuzzylojik-golf 🇺🇸 947 49 344ms 10 Sep 2025 222nd sisyphus-ppcg 🇦🇺 945 50 25ms 8 Aug 2022 222nd Lydxn 🇨🇦 945 50 37ms 21 Jul 2023 224th sisyphus-ppcg 🇦🇺 945 51 13ms 9 Aug 2022 224th tayloia 🇬🇧 945 51 11ms 17 Jan 2023 224th janbehrens 🇩🇪 945 51 13ms 20 Jun 2023 224th duckyluuk 🇳🇱 945 51 12ms 4 Oct 2024 228th SirBogman 🇺🇸 941 30 40ms 8 Jun 2025 228th 2bular 941 30 40ms 29 Oct 2025 228th GrayJoKing 🇦🇺 941 30 40ms 18 Nov 2025 231st aksyristos 941 39 45ms 24 Jan 2023 231st aaronze 🇦🇺 941 39 44ms 17 Sep 2023 231st TheZwierzLF 🇵🇱 941 39 41ms 9 days ago 234th saito-ta 🇯🇵 940 43 2,062ms 9 Aug 2022 235th JayXon 🇺🇸 940 69 383ms 8 Aug 2022 235th Lydxn 🇨🇦 940 69 386ms 8 Aug 2022 235th Shanethegamer 🇺🇸 940 69 368ms 8 Aug 2022 235th nwellnhof 🇩🇪 940 69 382ms 8 Aug 2022 235th GrayJoKing 🇦🇺 940 69 367ms 14 Aug 2022 235th revlayle 🇺🇸 940 69 371ms 16 Aug 2022 First Prev 161–240 of 2,486 Next Last