The Calendar hole will go live in approximately 8 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 859th Powerroff 873 56 17ms 11 Nov 2024 859th Europe2048 873 56 22ms 24 Nov 2024 859th agreegious 873 56 16ms 16 Mar 2025 859th qpwoeirut 873 56 16ms 13 Aug 2025 859th ApoChagi 873 56 16ms 17 Oct 2025 859th butnaruteodor 873 56 20ms 30 Oct 2025 859th snoozingnewt 🇨🇦 873 56 16ms 21 Nov 2025 888th jared-hughes 873 88 75ms 14 Aug 2022 888th MeWhenI 🇻🇦 873 88 70ms 21 Feb 2023 888th Yewzir 🇧🇪 873 88 61ms 10 Apr 2024 888th BlankSpruce 873 88 69ms 13 Nov 2024 888th DialFrost 🇸🇬 873 88 45ms 11 Apr 2025 888th pardouin 🇫🇷 873 88 50ms 25 Apr 2025 888th qwertyuiop3 🇷🇺 873 88 61ms 16 May 2025 895th GrayJoKing 🇦🇺 872 37 31ms 13 Aug 2022 896th Steffan153 🇫🇮 872 66 40ms 28 Jul 2024 896th pardouin 🇫🇷 872 66 42ms 17 Mar 2025 896th DialFrost 🇸🇬 872 66 40ms 11 Apr 2025 899th jared-hughes 872 165 26ms 18 Dec 2024 900th MeWhenI 🇻🇦 871 95 15ms 21 Feb 2023 900th Yewzir 🇧🇪 871 95 15ms 4 May 2024 902nd MeWhenI 🇻🇦 870 125 440ms 28 Mar 2025 903rd MeWhenI 🇻🇦 869 101 25ms 21 Feb 2023 904th JPRuskin 🇬🇧 868 42 4,023ms 26 Apr 2024 904th 5quiwyrm 868 42 3,942ms 10 Dec 2024 906th primo-ppcg 🇹🇭 868 139 1,747ms 15 Sep 2025 906th MeWhenI 🇻🇦 868 139 1,673ms 7 Nov 2025 906th Yewzir 🇧🇪 868 139 2,463ms 14 Nov 2025 909th sidok 867 45 460ms 5 May 2024 910th ovs-code 🇩🇪 866 80 21ms 11 Dec 2023 910th dokutan 866 80 25ms 5 May 2024 912th pardouin 🇫🇷 865 63 21ms 21 Oct 2024 913th primo-ppcg 🇹🇭 865 75 336ms 4 Sep 2022 913th m-tkach 🇺🇦 865 75 335ms 2 Jun 2023 913th Yewzir 🇧🇪 865 75 341ms 10 Apr 2024 913th b-illy 🇬🇧 865 75 407ms 15 days ago 913th CaedenHarper 🇨🇦 865 75 488ms 15 days ago 918th gifti258 864 59 74ms 15 Sep 2023 919th NewDefectus 🇮🇱 864 68 2ms 9 Aug 2022 919th pardouin 🇫🇷 864 68 3ms 21 Oct 2024 919th DialFrost 🇸🇬 864 68 2ms 11 Apr 2025 922nd inventshah 863 54 97ms 12 Dec 2022 922nd MeWhenI 🇻🇦 863 54 92ms 13 Dec 2022 922nd Alessandro-Balconi 🇮🇹 863 54 94ms 15 Jul 2023 925th Shanethegamer 🇺🇸 863 55 214ms 3 Aug 2024 925th DialFrost 🇸🇬 863 55 238ms 4 Aug 2024 925th sisyphus-ppcg 🇦🇺 863 55 134ms 6 Aug 2024 925th fuzzylojik-golf 🇺🇸 863 55 125ms 13 Jul 2025 929th GrayJoKing 🇦🇺 863 67 183ms 8 Aug 2022 929th Natanaelel 🇸🇪 863 67 193ms 9 Aug 2022 929th yzhs 🇩🇪 863 67 190ms 26 Jun 2023 929th cbrt-x 863 67 182ms 30 Aug 2024 929th pardouin 🇫🇷 863 67 189ms 19 Mar 2025 934th KasperKivimaeki 🇫🇮 863 89 89ms 26 Oct 2025 935th Shanethegamer 🇺🇸 863 92 136ms 15 Apr 2025 935th emgordon154 863 92 122ms 24 days ago 937th inventshah 862 58 4ms 15 Jan 2024 938th sisyphus-ppcg 🇦🇺 862 96 15ms 15 Nov 2022 939th lifthrasiir 🇰🇷 862 167 24ms 20 Dec 2024 940th uttumuttu 🇫🇮 861 56 11ms 8 Aug 2022 940th AlephSquirrel 861 56 11ms 15 Feb 2023 940th ejini6969 861 56 35ms 2 Apr 2023 943rd Bubbler-4 861 83 118ms 8 Aug 2022 943rd elgan65536 861 83 121ms 11 Apr 2024 943rd luuumine 🇫🇷 861 83 119ms 11 Nov 2025 946th MeWhenI 🇻🇦 861 187 555ms 19 Apr 2025 947th CheeseCake628 🇳🇴 860 54 343ms 18 Oct 2025 948th Yewzir 🇧🇪 860 102 24ms 10 Apr 2024 949th KrausRaus 🇺🇸 859 55 9ms 12 Aug 2022 949th josh-h-90 859 55 7ms 9 Sep 2022 951st GrayJoKing 🇦🇺 859 67 40ms 14 Aug 2022 951st stefangimmillaro 859 67 39ms 15 Apr 2023 951st MeWhenI 🇻🇦 859 67 39ms 10 May 2023 954th emplv 🇱🇻 859 109 276ms 26 Oct 2023 955th betaveros 858 57 15ms 8 Aug 2022 955th zacharybarbanell 858 57 15ms 8 Aug 2022 955th KatieLG 🇬🇧 858 57 15ms 8 Aug 2022 955th andre-lameirinhas 🇵🇹 858 57 16ms 8 Aug 2022 955th anter69 🇭🇺 858 57 16ms 9 Aug 2022 955th Bonjour27891 🇻🇳 858 57 235ms 10 Aug 2022 First Prev 881–960 of 2,478 Next Last