The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Niven Numbers (Long) in Python 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 227th aalec 833 60 22ms 25 Apr 2024 227th 1231234md5 🇨🇳 833 60 18ms 10 May 2024 227th cyxv 833 60 15ms 26 Jul 2024 227th NanduBC 833 60 16ms 7 Sep 2024 227th Loag 833 60 16ms 22 Sep 2024 227th gallium-gonzollium 833 60 15ms 2 Nov 2024 227th ejini6969 833 60 1,772ms 14 Jun 2025 227th Flekay 🇩🇪 833 60 16ms 10 Jul 2025 227th RaBa21 🇭🇺 833 60 17ms 11 Jul 2025 227th jacekwladzinski 833 60 16ms 3 Oct 2025 227th madeforlosers 833 60 14ms 11 Nov 2025 252nd michelebastione 🇮🇹 820 61 17ms 15 Aug 2022 252nd glesnick 820 61 15ms 15 Aug 2022 252nd MichaelMBradley 🇨🇦 820 61 15ms 18 Aug 2022 252nd argusdusty 🇺🇸 820 61 15ms 21 Aug 2022 252nd PhysicDev 🇫🇷 820 61 16ms 5 Sep 2022 252nd 0-4849 820 61 302ms 30 Oct 2022 252nd taesungh 820 61 15ms 15 Oct 2023 252nd adamnielson42 🇺🇸 820 61 16ms 15 Nov 2023 252nd Jacob385 820 61 19ms 18 Apr 2024 252nd kejcao 🇨🇦 820 61 22ms 16 May 2024 252nd dal548 820 61 22ms 12 Jun 2024 252nd hellwue 820 61 269ms 25 Jun 2024 264th jaxmattfair 🇺🇸 806 62 15ms 9 Aug 2022 264th P-Quentin 🇫🇷 806 62 267ms 10 Aug 2022 264th kenballus 806 62 16ms 17 Aug 2022 264th shibacho 🇯🇵 806 62 15ms 19 Aug 2022 264th LordJimX 806 62 16ms 26 Aug 2022 264th dgambit 806 62 15ms 30 Aug 2022 264th heyuncle 806 62 15ms 4 Sep 2022 264th sleepingtable 806 62 16ms 6 Sep 2022 264th LukasFolwarczny 🇨🇿 806 62 15ms 22 Sep 2022 264th kevdah 806 62 16ms 4 Oct 2022 264th Bodo171 806 62 15ms 25 Nov 2022 264th PYRiTEmonark 806 62 16ms 29 Nov 2022 264th badboj40 806 62 15ms 26 Dec 2022 264th MiranDaniel 🇨🇿 806 62 15ms 2 Sep 2023 264th ssbhatt4321 806 62 15ms 14 Oct 2023 264th midnattssol 🇸🇪 806 62 15ms 19 Oct 2023 264th eiburns 806 62 16ms 27 Oct 2023 264th adoxography 806 62 15ms 19 Nov 2023 264th Pale-Vessel 806 62 15ms 18 Dec 2023 264th mstang107 806 62 17ms 20 Dec 2023 264th HumanoidCPU 806 62 21ms 26 Apr 2024 264th CutSandstone 806 62 15ms 8 Jul 2024 264th alexeldridge 806 62 15ms 8 Aug 2024 264th CyberTapir 806 62 16ms 28 Aug 2024 264th Andrey135296 806 62 16ms 25 Nov 2024 264th croc54 806 62 17ms 13 Jan 2025 264th robin-scragg 806 62 17ms 22 May 2025 264th iczelia 🇩🇪 806 62 16ms 19 Oct 2025 292nd descentcare 794 63 19ms 8 Aug 2022 292nd dankleeman 794 63 15ms 8 Aug 2022 292nd Lemonz-13223 794 63 16ms 23 Aug 2022 292nd MarioSchwalbe 794 63 15ms 26 Aug 2022 292nd MichalMarsalek 🇨🇿 794 63 17ms 29 Aug 2022 292nd andre-de-lorde 794 63 18ms 6 Sep 2022 292nd za3k 794 63 15ms 9 Oct 2022 292nd PATTRIM 794 63 18ms 5 Jan 2023 292nd Igyeom 🇰🇷 794 63 15ms 9 Jun 2023 292nd alexjurkiewicz 🇦🇺 794 63 18ms 8 Nov 2023 292nd jameswmccarty 794 63 16ms 15 Jun 2024 292nd Mathrew2012 794 63 16ms 15 Aug 2024 292nd FernSchoenberg 794 63 16ms 9 Oct 2024 292nd ihatethefrench 794 63 18ms 5 Jan 2025 292nd EnisEfe0 794 63 21ms 18 May 2025 307th gdupeux 781 64 15ms 26 Aug 2022 307th estomagordo 🇳🇱 781 64 15ms 26 Oct 2022 307th gabrielsqw 781 64 15ms 17 Apr 2023 307th cingulataluke 781 64 16ms 29 Aug 2023 307th DavidHospital 781 64 17ms 22 Sep 2023 307th RedzGoose 🇦🇺 781 64 20ms 20 Oct 2024 307th Andrey2001 781 64 20ms 17 days ago 314th bwenstar 769 65 18ms 11 Aug 2022 314th Glinte 769 65 16ms 13 Dec 2023 314th markusgraube 769 65 16ms 9 Mar 2024 314th wilhelmines 769 65 15ms 17 Jun 2024 314th Schreipfelerer 769 65 16ms 11 Sep 2024 314th TheZwierzLF 🇵🇱 769 65 17ms 19 May 2025 320th hymanimy 758 66 15ms 18 Aug 2022 First Prev 241–320 of 471 Next Last