The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Niven Numbers 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 520th jameswmccarty 721 61 9ms 15 Jun 2024 520th wilhelmines 721 61 9ms 17 Jun 2024 520th OrangeBacon 721 61 9ms 12 Aug 2024 520th FernSchoenberg 721 61 10ms 14 Oct 2024 520th ihatethefrench 721 61 9ms 4 Jan 2025 520th EnisEfe0 721 61 10ms 18 May 2025 567th estomagordo 🇳🇱 710 62 9ms 3 Aug 2019 567th cellobix 710 62 9ms 13 Aug 2019 567th adoxography 710 62 12ms 10 Oct 2019 567th RobertPoienar 710 62 9ms 18 Oct 2019 567th Lemonfrostt 710 62 9ms 14 Dec 2019 567th Randomness74 710 62 9ms 14 Mar 2020 567th clementblaudeau 710 62 13ms 28 May 2021 567th hymanimy 710 62 9ms 24 Aug 2021 567th JuliaSzulc 710 62 10ms 15 Mar 2022 567th PATTRIM 710 62 9ms 5 Jan 2023 567th NDR0216 🇹🇼 710 62 9ms 13 Feb 2023 567th Edjyzod 710 62 9ms 7 Mar 2023 567th qwjhvbxi 710 62 9ms 9 Feb 2024 567th Andrey2001 710 62 19ms 10 days ago 581st ArturLange 698 63 14ms 5 Sep 2018 581st suchwise 698 63 9ms 30 Oct 2019 581st hyphz 698 63 9ms 15 Jan 2020 581st 130N35 698 63 9ms 27 Jan 2020 581st valgardg 🇮🇸 698 63 10ms 13 Aug 2021 581st mokymok 🇺🇸 698 63 10ms 23 Nov 2021 581st ellieoverwood 698 63 9ms 29 Dec 2021 581st mbittner20 698 63 9ms 27 May 2023 581st suhren 698 63 9ms 1 Oct 2023 581st VictorStenvers 🇳🇱 698 63 9ms 2 May 2024 581st Schreipfelerer 698 63 9ms 11 Sep 2024 581st TheZwierzLF 🇵🇱 698 63 10ms 19 May 2025 593rd Sticky-Bits 688 64 9ms 26 Apr 2019 593rd derekthatcher 688 64 15ms 22 Sep 2020 593rd joe0400 688 64 9ms 7 Sep 2021 593rd tetraxile 688 64 9ms 3 Oct 2021 593rd BrenSchaap 688 64 9ms 20 Oct 2021 593rd dillon-duncando 688 64 9ms 24 Dec 2021 593rd raketexyz 688 64 10ms 29 Dec 2021 593rd james-downey 688 64 9ms 14 Jul 2022 593rd a-penton 688 64 9ms 22 Sep 2022 593rd eshilo-draper 688 64 9ms 8 Oct 2022 593rd AodhanDalton 688 64 10ms 24 Oct 2022 593rd Ythaenagor 688 64 9ms 5 Aug 2024 593rd Deedogg 688 64 9ms 9 Sep 2024 593rd Apzyte-Gamer 688 64 15ms 2 Nov 2024 593rd theonetruenerd 688 64 9ms 9 Jun 2025 593rd jm600 688 64 9ms 25 Aug 2025 609th ari-gutierrez 677 65 9ms 22 Oct 2018 609th SurplusSineWaves 677 65 9ms 21 Jan 2019 609th evanrittner 677 65 9ms 11 Mar 2019 609th alangodfrey 677 65 9ms 12 Jun 2019 609th TrAyZeN 677 65 10ms 12 Mar 2020 609th febiw 677 65 9ms 22 Mar 2020 609th alexandre-lavoie 677 65 9ms 20 Oct 2020 609th Retkoj 677 65 9ms 30 Nov 2020 609th wrhm 677 65 9ms 12 Dec 2020 609th Manby 677 65 9ms 7 Jul 2021 609th shen-hong-xin 677 65 11ms 7 Jul 2021 609th danielweper 677 65 9ms 21 Oct 2021 609th wirewolf010 677 65 9ms 4 Jan 2022 609th kyleclaassen 677 65 9ms 11 Mar 2022 609th TheSmilingTurtle 677 65 9ms 14 May 2022 609th celiendonze 🇨🇭 677 65 9ms 29 Mar 2023 609th Glinte 677 65 9ms 13 Dec 2023 609th azure-blondon 677 65 16ms 11 May 2024 609th kistlerf 🇨🇭 677 65 16ms 30 May 2025 609th yukii1004 677 65 11ms 25 Sep 2025 629th Threadzless 667 66 13ms 29 Oct 2018 629th patbassing 667 66 9ms 15 Jun 2019 629th kusti8 667 66 9ms 30 Jul 2019 629th GodEmperorCaterpie 667 66 9ms 4 Sep 2019 629th KiwiKoder0123 667 66 9ms 22 Oct 2019 629th DarkTemplar5 667 66 15ms 24 Feb 2020 629th jthomas1294 667 66 9ms 7 May 2020 629th VictorFordham 667 66 10ms 8 Aug 2020 629th the-soph-ia 667 66 9ms 31 Jan 2021 629th ethandhunt 667 66 9ms 21 Jul 2021 629th Y0UR-U5ERNAME 667 66 10ms 5 Sep 2021 629th martinnorling 🇸🇪 667 66 9ms 4 Feb 2022 First Prev 561–640 of 908 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