The Calendar hole will go live in approximately 13 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 560th marshallward 🇺🇸 914 63 39ms 11 Nov 2022 562nd arctouch-cristiannevianna 914 71 371ms 15 Jun 2023 562nd leth4 914 71 359ms 5 Jul 2023 562nd malworthy 914 71 371ms 25 Oct 2023 562nd Mikey-Beep 🇬🇧 914 71 402ms 23 Jul 2025 566th prplz 🇦🇺 913 51 141ms 12 Dec 2022 566th Steffan153 🇫🇮 913 51 148ms 15 Aug 2024 568th edsrzf 🇳🇿 912 76 19ms 18 Jan 2025 568th zacjl 912 76 22ms 19 Jan 2025 570th KrausRaus 🇺🇸 911 34 108ms 12 Aug 2022 570th primo-ppcg 🇹🇭 911 34 68ms 22 Jan 2025 572nd nwellnhof 🇩🇪 911 40 3,924ms 9 Mar 2023 572nd HumanEquivalentUnit 911 40 4,024ms 24 Oct 2023 572nd dcgjb 911 40 4,004ms 23 Jan 2024 572nd DialFrost 🇸🇬 911 40 3,988ms 10 Oct 2024 576th AlephSquirrel 911 54 13ms 23 Apr 2023 576th ovs-code 🇩🇪 911 54 12ms 10 Dec 2023 578th sisyphus-ppcg 🇦🇺 911 62 83ms 8 Aug 2022 578th GrayJoKing 🇦🇺 911 62 82ms 14 Aug 2022 578th primo-ppcg 🇹🇭 911 62 84ms 4 Sep 2022 578th steffan-polygolf 911 62 80ms 19 Feb 2023 578th MeWhenI 🇻🇦 911 62 81ms 21 Feb 2023 578th stefangimmillaro 911 62 82ms 15 Apr 2023 578th Yewzir 🇧🇪 911 62 80ms 10 Apr 2024 585th MeWhenI 🇻🇦 911 81 452ms 7 Nov 2025 586th inventshah 910 51 357ms 16 Jan 2024 586th GolfingSuccess 🇬🇷 910 51 358ms 20 Jan 2024 586th ridingqwerty 🇺🇸 910 51 358ms 22 Jan 2024 586th neel11235813 910 51 350ms 10 Mar 2024 586th duckyluuk 🇳🇱 910 51 345ms 27 Mar 2024 586th b-illy 🇬🇧 910 51 359ms 9 Sep 2024 586th emgordon154 910 51 360ms 13 Apr 2025 586th Babafaba 910 51 394ms 17 Oct 2025 594th eranws 910 53 34ms 1 Nov 2022 595th Lydxn 🇨🇦 910 55 4ms 15 Jan 2024 595th Steffan153 🇫🇮 910 55 3ms 28 Jul 2024 595th fuzzylojik-golf 🇺🇸 910 55 3ms 13 Jul 2025 595th Yewzir 🇧🇪 910 55 5ms 18 Nov 2025 595th GrayJoKing 🇦🇺 910 55 3ms 19 Nov 2025 600th chunes3 🇺🇸 910 56 77ms 15 Sep 2023 600th Steffan153 🇫🇮 910 56 74ms 16 Sep 2023 600th 4hg 🇺🇸 910 56 75ms 17 Sep 2023 600th Lydxn 🇨🇦 910 56 74ms 28 Sep 2023 600th Yewzir 🇧🇪 910 56 74ms 7 Mar 2024 605th sisyphus-ppcg 🇦🇺 909 63 122ms 8 Aug 2022 605th GrayJoKing 🇦🇺 909 63 122ms 14 Aug 2022 605th primo-ppcg 🇹🇭 909 63 119ms 4 Sep 2022 605th steffan-polygolf 909 63 121ms 19 Feb 2023 605th MeWhenI 🇻🇦 909 63 121ms 21 Feb 2023 605th Yewzir 🇧🇪 909 63 125ms 10 Apr 2024 611th sisyphus-ppcg 🇦🇺 909 103 268ms 8 Aug 2022 611th GrayJoKing 🇦🇺 909 103 262ms 14 Aug 2022 613th Lv0Sys 🇵🇱 908 43 364ms 11 days ago 613th snoozingnewt 🇨🇦 908 43 445ms 8 days ago 615th Sp3000 🇦🇺 906 54 16ms 8 Aug 2022 615th GolfingSuccess 🇬🇷 906 54 16ms 8 Aug 2022 615th 051 🇸🇬 906 54 16ms 8 Aug 2022 615th CubeyTheCube 906 54 16ms 8 Aug 2022 615th ZakkkkAttackkkk 🇵🇭 906 54 18ms 8 Aug 2022 615th jared-hughes 906 54 16ms 9 Aug 2022 615th annaproxy 906 54 16ms 9 Aug 2022 615th BlankSpruce 906 54 16ms 17 Aug 2022 615th prplz 🇦🇺 906 54 16ms 19 Aug 2022 615th bob-th 906 54 16ms 22 Aug 2022 615th TFeld00 🇩🇰 906 54 16ms 3 Oct 2022 615th bricknellj 906 54 16ms 31 Oct 2022 615th thehylian 906 54 16ms 27 Dec 2022 615th janbehrens 🇩🇪 906 54 16ms 11 Jul 2023 615th AlexanderFair 906 54 16ms 12 Jul 2023 615th fkantelberg 906 54 16ms 18 Jul 2023 615th FlorianCassayre 🇫🇷 906 54 16ms 28 Sep 2023 615th ndren 906 54 20ms 9 Oct 2023 615th neel11235813 906 54 16ms 20 Oct 2023 615th ridingqwerty 🇺🇸 906 54 16ms 22 Dec 2023 615th bzijlema 🇳🇱 906 54 16ms 12 Jan 2024 615th jhu04 906 54 19ms 18 Jan 2024 615th duckyluuk 🇳🇱 906 54 16ms 24 Jan 2024 615th 5cw 🇺🇸 906 54 18ms 5 Mar 2024 615th Lewenhaupt 906 54 17ms 22 Mar 2024 615th Grrisly 906 54 15ms 25 Mar 2024 First Prev 561–640 of 2,482 Next Last