The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Niven Numbers in all languages in chars. 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 Chars Time Submitted 833rd janlelis 919 47 9ms 15 Aug 2025 833rd LordSir101 919 47 9ms 18 Aug 2025 833rd Emutis 🇱🇹 919 47 11ms 15 Sep 2025 833rd Lv0Sys 🇵🇱 919 47 10ms 17 days ago 885th ovs-code 🇩🇪 919 65 460ms 27 Feb 2022 885th Lydxn 🇨🇦 919 65 446ms 27 Feb 2022 885th JayXon 🇺🇸 919 65 481ms 28 Feb 2022 885th GrayJoKing 🇦🇺 919 65 479ms 28 Feb 2022 885th prplz 🇦🇺 919 65 460ms 6 Apr 2022 885th lynn 919 65 447ms 3 Jun 2022 885th MeWhenI 🇻🇦 919 65 452ms 10 Oct 2022 885th Steffan153 🇫🇮 919 65 448ms 30 Nov 2022 885th DialFrost 🇸🇬 919 65 412ms 14 Jan 2023 885th sean-niemann 🇺🇸 919 65 470ms 17 Jan 2023 885th Shanethegamer 🇺🇸 919 65 447ms 8 Mar 2023 885th sisyphus-ppcg 🇦🇺 919 65 407ms 23 Mar 2023 885th Yewzir 🇧🇪 919 65 424ms 5 Nov 2023 885th Betuaredead 919 65 477ms 11 Nov 2023 885th pardouin 🇫🇷 919 65 440ms 21 Aug 2024 885th voytxt 🇨🇿 919 65 391ms 12 Jan 2025 885th emgordon154 919 65 454ms 28 May 2025 885th fuzzylojik-golf 🇺🇸 919 65 526ms 18 Jul 2025 885th edsrzf 🇳🇿 919 65 437ms 26 Jul 2025 885th albanian-laundromat 919 65 436ms 24 Sep 2025 885th snoozingnewt 🇨🇦 919 65 403ms 15 days ago 906th MeWhenI 🇻🇦 918 36 4ms 29 Nov 2022 907th billings7 🇬🇧 917 60 322ms 21 Nov 2021 907th ovs-code 🇩🇪 917 60 313ms 21 Nov 2021 907th primo-ppcg 🇹🇭 917 60 320ms 21 Nov 2021 907th prplz 🇦🇺 917 60 316ms 21 Nov 2021 907th ScottHamper 917 60 320ms 21 Nov 2021 907th sisyphus-ppcg 🇦🇺 917 60 317ms 21 Nov 2021 907th ssiquoya 🇷🇺 917 60 324ms 21 Nov 2021 907th GrayJoKing 🇦🇺 917 60 319ms 14 Mar 2022 907th annaproxy 917 60 324ms 15 Mar 2022 907th ericlangedijk 🇸🇮 917 60 321ms 15 Mar 2022 907th lynn 917 60 319ms 3 Jun 2022 907th MeWhenI 🇻🇦 917 60 322ms 10 Oct 2022 907th Steffan153 🇫🇮 917 60 349ms 17 Nov 2022 907th clockworknazo 917 60 320ms 26 Nov 2022 907th DialFrost 🇸🇬 917 60 360ms 14 Jan 2023 907th sean-niemann 🇺🇸 917 60 360ms 17 Jan 2023 907th tomtheisen 🇺🇸 917 60 351ms 17 Jan 2023 907th Shanethegamer 🇺🇸 917 60 313ms 8 Mar 2023 907th m-tkach 🇺🇦 917 60 319ms 2 Jun 2023 907th Yewzir 🇧🇪 917 60 334ms 23 Sep 2023 907th Betuaredead 917 60 318ms 11 Nov 2023 907th pardouin 🇫🇷 917 60 340ms 21 Aug 2024 907th voytxt 🇨🇿 917 60 369ms 12 Jan 2025 907th b-illy 🇬🇧 917 60 318ms 21 Jan 2025 907th fuzzylojik-golf 🇺🇸 917 60 373ms 15 May 2025 907th edsrzf 🇳🇿 917 60 322ms 26 Jul 2025 907th albanian-laundromat 917 60 379ms 24 Sep 2025 907th CaedenHarper 🇨🇦 917 60 354ms 17 Oct 2025 907th snoozingnewt 🇨🇦 917 60 383ms 15 days ago 936th Lydxn 🇨🇦 917 62 1ms 19 Jul 2023 937th kg583 🇺🇸 917 63 5ms 26 Jul 2025 938th albanian-laundromat 917 66 407ms 24 Sep 2025 938th GolfingSuccess 🇬🇷 917 66 635ms 24 Sep 2025 938th Shanethegamer 🇺🇸 917 66 652ms 25 Sep 2025 938th nwellnhof 🇩🇪 917 66 472ms 25 Sep 2025 938th Yax42 🇫🇷 917 66 474ms 3 Oct 2025 938th kmathis22 917 66 486ms 28 Oct 2025 938th MeWhenI 🇻🇦 917 66 434ms 7 Nov 2025 945th b97tsk 917 88 278ms 21 Apr 2020 945th bendiscz 917 88 284ms 21 Apr 2020 945th prplz 🇦🇺 917 88 263ms 5 Jun 2021 945th primo-ppcg 🇹🇭 917 88 259ms 5 Jun 2021 945th ovs-code 🇩🇪 917 88 262ms 19 Nov 2021 945th emplv 🇱🇻 917 88 264ms 18 Jan 2022 945th GrayJoKing 🇦🇺 917 88 281ms 14 Mar 2022 945th Shanethegamer 🇺🇸 917 88 263ms 8 Mar 2023 945th m-tkach 🇺🇦 917 88 265ms 14 Jun 2023 945th elgan65536 917 88 284ms 5 Mar 2024 945th emgordon154 917 88 256ms 17 Jan 2025 945th edsrzf 🇳🇿 917 88 270ms 26 Jul 2025 945th targrik 917 88 265ms 27 Aug 2025 945th snoozingnewt 🇨🇦 917 88 247ms 15 days ago 959th sisyphus-ppcg 🇦🇺 916 45 81ms 30 May 2021 959th cure-honey 🇯🇵 916 45 79ms 29 Jun 2021 First Prev 881–960 of 4,111 Next Last