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 314th handisb 800 55 9ms 1 Oct 2019 314th mogron 800 55 11ms 14 Dec 2019 314th Reyzartz 800 55 9ms 16 Feb 2020 314th LlamaLad7 🇬🇧 800 55 9ms 13 Mar 2020 314th Phanabani 🇺🇸 800 55 9ms 21 Oct 2020 314th cbondurant 800 55 9ms 5 May 2021 314th jhunterkohler 800 55 9ms 20 May 2021 314th richard-oelze 🇩🇪 800 55 9ms 27 May 2021 314th schachmattmatt 800 55 9ms 18 Aug 2021 314th RYNO8 800 55 11ms 29 Aug 2021 314th face0xff 800 55 9ms 3 Nov 2021 314th amollberg 🇸🇪 800 55 9ms 5 Jan 2022 314th Bonjour27891 🇻🇳 800 55 12ms 19 Feb 2022 314th jdw1023 800 55 9ms 29 Apr 2022 314th Natanaelel 🇸🇪 800 55 9ms 24 Jun 2022 314th dzshn 800 55 9ms 17 Aug 2022 314th galloj 🇨🇿 800 55 9ms 18 Aug 2022 314th jfallon1997 800 55 9ms 6 Sep 2022 314th suwat513 800 55 9ms 13 Sep 2022 314th MaxElf999 800 55 9ms 23 Sep 2022 314th jsthope 800 55 9ms 28 Sep 2022 314th fredrik-bakke 🇳🇴 800 55 9ms 2 Oct 2022 314th trist224 🇫🇷 800 55 12ms 18 Oct 2022 314th fourth-bit 800 55 11ms 6 Dec 2022 314th SheepIsGoat 800 55 9ms 18 Jan 2023 314th NoahBolohan 🇨🇦 800 55 9ms 7 Feb 2023 314th austin-siu 800 55 9ms 12 Feb 2023 314th shellbertt 🇨🇦 800 55 9ms 26 Feb 2023 314th CheeseCake628 🇳🇴 800 55 9ms 20 Mar 2023 314th 4ndyJ 🇬🇧 800 55 9ms 20 Mar 2023 314th felixcroc 800 55 9ms 1 Apr 2023 314th BREMAUCY 🇫🇷 800 55 9ms 13 Jul 2023 314th minhtrancccp 800 55 10ms 2 Sep 2023 314th StronkCheese 🇺🇸 800 55 9ms 8 Sep 2023 314th Andriamanitra 🇫🇮 800 55 9ms 15 Jan 2024 314th RobertHoeh 800 55 11ms 18 Jan 2024 314th zwxzwxzwx21 800 55 9ms 30 Jan 2024 314th inverseLorentz 🇦🇺 800 55 10ms 18 Feb 2024 314th sultan 800 55 11ms 3 Mar 2024 314th namelessiw 800 55 9ms 5 Mar 2024 314th fgrosshans 🇫🇷 800 55 10ms 11 Jun 2024 314th wuzekai518 800 55 9ms 17 Jun 2024 314th EnTerr 800 55 9ms 25 Aug 2024 314th logvp 800 55 11ms 7 Oct 2024 314th charliegaming 800 55 9ms 21 Oct 2024 314th syyynth 800 55 9ms 13 Dec 2024 314th Pyroan 800 55 9ms 25 Feb 2025 314th Dandandooo 800 55 9ms 5 May 2025 314th nooberitess 800 55 9ms 22 May 2025 314th Mikey-Beep 🇬🇧 800 55 10ms 25 Jul 2025 371st danielwang5 786 56 9ms 3 Jan 2019 371st SniperSmiley 🇺🇸 786 56 9ms 23 Jun 2021 371st lovernj 786 56 9ms 9 Feb 2022 371st hellwue 786 56 9ms 25 Feb 2022 371st Re-Adventures 🇮🇳 786 56 10ms 16 Mar 2022 371st ademdj19 786 56 9ms 29 Apr 2022 371st Anonymousellama21 786 56 12ms 15 Jun 2022 371st alexjurkiewicz 🇦🇺 786 56 9ms 16 Jul 2022 371st jhpaques 🇫🇷 786 56 9ms 26 Jul 2022 371st Kloppermand 🇩🇰 786 56 9ms 29 Sep 2022 371st n0Oo0Oo0b 786 56 9ms 29 Dec 2022 371st DanielPeterssonAI 786 56 9ms 17 Mar 2023 371st m42km 786 56 9ms 21 Oct 2023 371st mathisfun271 786 56 9ms 24 Dec 2023 371st gabe-gallegos 786 56 11ms 7 May 2024 371st stertooy 🇧🇪 786 56 9ms 10 Jun 2024 371st PyryL 🇫🇮 786 56 9ms 25 Aug 2024 371st itljan30 786 56 9ms 28 Jan 2025 371st Troon 786 56 9ms 17 Feb 2025 371st codewrite 🇬🇧 786 56 9ms 25 May 2025 371st ffelixm 786 56 9ms 28 May 2025 371st klixel 🇨🇦 786 56 12ms 19 Jun 2025 371st YAJUE114514 786 56 9ms 29 Jul 2025 371st wobblybits 786 56 9ms 23 Aug 2025 371st Hyperoplex145 786 56 9ms 10 Nov 2025 371st Matter1024 🇮🇳 786 56 9ms 14 Nov 2025 397th GeoffroyF 772 57 15ms 14 May 2018 397th jiaminglimjm 🇲🇾 772 57 9ms 28 Nov 2019 397th AforAmpere 772 57 9ms 7 Jun 2020 397th abailey2020 🇺🇸 772 57 11ms 11 Dec 2020 First Prev 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