The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Niven Numbers 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 75th teafork 957 46 9ms 9 Feb 2020 75th andersk 🇺🇸 957 46 10ms 19 Mar 2020 75th Attero 🇸🇪 957 46 9ms 26 Mar 2020 75th dmoa 957 46 9ms 10 Jul 2020 75th hashkitten 957 46 9ms 24 Sep 2020 75th Dazza314 🇬🇧 957 46 9ms 7 Nov 2020 75th janbehrens 🇩🇪 957 46 9ms 8 Dec 2020 75th btjones0 957 46 9ms 27 Dec 2020 75th OllieBoyne 🇬🇧 957 46 9ms 6 Feb 2021 75th vezzick 957 46 10ms 5 Mar 2021 75th RDShah 957 46 9ms 15 Apr 2021 75th urojony 🇵🇱 957 46 9ms 27 May 2021 75th MarcMush 🇫🇷 957 46 9ms 29 Jun 2021 75th Fishron 957 46 9ms 19 Oct 2021 75th Indivicivet 957 46 9ms 24 Oct 2021 75th StefanHabel 🇨🇦 957 46 9ms 14 Dec 2021 75th ZakkkkAttackkkk 🇵🇭 957 46 9ms 20 Dec 2021 75th Irratix 🇳🇱 957 46 9ms 17 Apr 2022 75th k3w1k0d3r 957 46 9ms 25 Jun 2022 75th 051 🇸🇬 957 46 9ms 8 Aug 2022 75th TobyBoyne 🇬🇧 957 46 9ms 12 Aug 2022 75th MichalMarsalek 🇨🇿 957 46 9ms 29 Aug 2022 75th JaimeCoderIO 957 46 9ms 29 Sep 2022 75th IshanPanpaliya 957 46 9ms 19 Oct 2022 75th FlorianCassayre 🇫🇷 957 46 9ms 6 Nov 2022 75th thehylian 957 46 9ms 30 Dec 2022 75th Techdude01 957 46 9ms 18 Jan 2023 75th SirFireball3521 957 46 9ms 9 Feb 2023 75th scpchicken 🇵🇼 957 46 9ms 22 Feb 2023 75th kellantech 957 46 10ms 2 Jun 2023 75th lillian314159 957 46 9ms 13 Jul 2023 75th Alex-x90 🇺🇸 957 46 9ms 17 Jul 2023 75th AlexanderFair 957 46 9ms 24 Jul 2023 75th gXLg 🇩🇪 957 46 9ms 23 Sep 2023 75th ridingqwerty 🇺🇸 957 46 9ms 22 Dec 2023 75th bzijlema 🇳🇱 957 46 9ms 12 Jan 2024 75th jhu04 957 46 9ms 18 Jan 2024 75th bob-th 957 46 9ms 2 Feb 2024 75th Bmrl7 957 46 9ms 21 Feb 2024 75th elgan65536 957 46 9ms 5 Mar 2024 75th Lewenhaupt 957 46 9ms 22 Mar 2024 75th jmfk 957 46 9ms 22 Mar 2024 75th jtaxen 957 46 9ms 5 Apr 2024 75th dokutan 957 46 9ms 30 Apr 2024 75th 5cw 🇺🇸 957 46 10ms 5 May 2024 75th bizy-coder 957 46 10ms 15 Aug 2024 75th jatloe 957 46 9ms 26 Aug 2024 75th croc54 957 46 9ms 18 Nov 2024 75th lifthrasiir 🇰🇷 957 46 9ms 3 Dec 2024 75th andrewjc2000 957 46 9ms 3 Mar 2025 75th plcc0 957 46 9ms 5 Mar 2025 75th keelimeguy 🇺🇸 957 46 9ms 6 May 2025 75th Artemis21 🇬🇧 957 46 9ms 23 May 2025 75th dirckvdende 957 46 9ms 20 Jul 2025 75th qpwoeirut 957 46 9ms 13 Aug 2025 75th InigoK 🇺🇸 957 46 9ms 8 Sep 2025 75th blaztoma 🇱🇹 957 46 9ms 15 Sep 2025 75th ahmetdemirag 🇨🇾 957 46 9ms 1 Oct 2025 75th luuumine 🇫🇷 957 46 9ms 17 Oct 2025 75th butnaruteodor 957 46 9ms 30 Oct 2025 75th CommandLeo 🇮🇹 957 46 10ms 15 Nov 2025 75th Languag3 957 46 9ms 13 days ago 75th zgialor-lab 957 46 14ms 32 hours ago 144th deflatSOCO 936 47 9ms 11 Apr 2019 144th andre-lameirinhas 🇵🇹 936 47 9ms 27 Apr 2020 144th ToriTheChicken 936 47 10ms 26 Jul 2020 144th thisishowmymindworks 🇳🇴 936 47 13ms 26 Jul 2020 144th JeromeSchweitzer 936 47 9ms 7 Sep 2020 144th Maltysen 936 47 9ms 26 Sep 2020 144th ToonAlfrink 936 47 9ms 13 Nov 2020 144th 77Tigers 936 47 8ms 1 Mar 2021 144th ydevor 🇮🇱 936 47 9ms 11 Mar 2021 144th abba23 936 47 9ms 14 Jun 2021 144th jacklynnepenick 936 47 9ms 19 Aug 2021 144th ehulinsky 🇺🇸 936 47 9ms 10 Nov 2021 144th xy3 🇮🇪 936 47 11ms 19 Nov 2021 144th chartung17 936 47 9ms 5 Dec 2021 144th krcs 🇵🇱 936 47 11ms 29 Dec 2021 144th anter69 🇭🇺 936 47 9ms 9 Mar 2022 144th CedricGebistorf 936 47 9ms 11 Mar 2022 First Prev 81–160 of 909 Next Last