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 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 222nd JunkIce 833 60 15ms 7 Oct 2024 222nd gallium-gonzollium 833 60 15ms 2 Nov 2024 222nd ejini6969 833 60 1,772ms 14 Jun 2025 222nd Flekay 🇩🇪 833 60 16ms 10 Jul 2025 222nd jacekwladzinski 833 60 16ms 3 Oct 2025 222nd madeforlosers 833 60 14ms 11 Nov 2025 247th michelebastione 🇮🇹 820 61 17ms 15 Aug 2022 247th glesnick 820 61 15ms 15 Aug 2022 247th MichaelMBradley 🇨🇦 820 61 15ms 18 Aug 2022 247th argusdusty 🇺🇸 820 61 15ms 21 Aug 2022 247th PhysicDev 🇫🇷 820 61 16ms 5 Sep 2022 247th jsthope 820 61 20ms 28 Sep 2022 247th 0-4849 820 61 302ms 30 Oct 2022 247th taesungh 820 61 15ms 15 Oct 2023 247th adamnielson42 🇺🇸 820 61 16ms 15 Nov 2023 247th kejcao 🇨🇦 820 61 22ms 16 May 2024 247th dal548 820 61 22ms 12 Jun 2024 247th hellwue 820 61 269ms 25 Jun 2024 259th jaxmattfair 🇺🇸 806 62 15ms 9 Aug 2022 259th P-Quentin 🇫🇷 806 62 267ms 10 Aug 2022 259th kenballus 806 62 16ms 17 Aug 2022 259th shibacho 🇯🇵 806 62 15ms 19 Aug 2022 259th LordJimX 806 62 16ms 26 Aug 2022 259th dgambit 806 62 15ms 30 Aug 2022 259th heyuncle 806 62 15ms 4 Sep 2022 259th sleepingtable 806 62 16ms 6 Sep 2022 259th LukasFolwarczny 🇨🇿 806 62 15ms 22 Sep 2022 259th kevdah 806 62 16ms 4 Oct 2022 259th Bodo171 806 62 15ms 25 Nov 2022 259th PYRiTEmonark 806 62 16ms 29 Nov 2022 259th badboj40 806 62 15ms 26 Dec 2022 259th MiranDaniel 🇨🇿 806 62 15ms 2 Sep 2023 259th ssbhatt4321 806 62 15ms 14 Oct 2023 259th midnattssol 🇸🇪 806 62 15ms 19 Oct 2023 259th eiburns 806 62 16ms 27 Oct 2023 259th adoxography 806 62 15ms 19 Nov 2023 259th Pale-Vessel 806 62 15ms 18 Dec 2023 259th mstang107 806 62 17ms 20 Dec 2023 259th zwxzwxzwx21 806 62 15ms 30 Jan 2024 259th CutSandstone 806 62 15ms 8 Jul 2024 259th alexeldridge 806 62 15ms 8 Aug 2024 259th CyberTapir 806 62 16ms 28 Aug 2024 259th Andrey135296 806 62 16ms 25 Nov 2024 259th croc54 806 62 17ms 13 Jan 2025 259th iczelia 🇩🇪 806 62 16ms 19 Oct 2025 286th descentcare 794 63 19ms 8 Aug 2022 286th dankleeman 794 63 15ms 8 Aug 2022 286th Lemonz-13223 794 63 16ms 23 Aug 2022 286th MarioSchwalbe 794 63 15ms 26 Aug 2022 286th MichalMarsalek 🇨🇿 794 63 17ms 29 Aug 2022 286th andre-de-lorde 794 63 18ms 6 Sep 2022 286th za3k 794 63 15ms 9 Oct 2022 286th PATTRIM 794 63 18ms 5 Jan 2023 286th Igyeom 🇰🇷 794 63 15ms 9 Jun 2023 286th alexjurkiewicz 🇦🇺 794 63 18ms 8 Nov 2023 286th jameswmccarty 794 63 16ms 15 Jun 2024 286th Mathrew2012 794 63 16ms 15 Aug 2024 286th FernSchoenberg 794 63 16ms 9 Oct 2024 286th ihatethefrench 794 63 18ms 5 Jan 2025 286th EnisEfe0 794 63 21ms 18 May 2025 301st gdupeux 781 64 15ms 26 Aug 2022 301st estomagordo 🇳🇱 781 64 15ms 26 Oct 2022 301st gabrielsqw 781 64 15ms 17 Apr 2023 301st DavidHospital 781 64 17ms 22 Sep 2023 301st RedzGoose 🇦🇺 781 64 20ms 20 Oct 2024 301st Andrey2001 781 64 20ms 17 days ago 307th elgan65536 769 65 16ms 15 Nov 2023 307th Glinte 769 65 16ms 13 Dec 2023 307th markusgraube 769 65 16ms 9 Mar 2024 307th wilhelmines 769 65 15ms 17 Jun 2024 307th Schreipfelerer 769 65 16ms 11 Sep 2024 307th TheZwierzLF 🇵🇱 769 65 17ms 19 May 2025 313th hymanimy 758 66 15ms 18 Aug 2022 313th Sloimayyy 758 66 16ms 21 Aug 2022 313th bthalheim 758 66 16ms 23 Aug 2022 313th SaswatPadhi 758 66 17ms 5 Sep 2022 313th eshilo-draper 758 66 16ms 8 Oct 2022 313th dillon-duncando 758 66 16ms 9 Oct 2022 313th AodhanDalton 758 66 16ms 24 Oct 2022 313th myleopard 758 66 16ms 22 Dec 2022 First Prev 241–320 of 471 Next Last