The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Prime 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 156th YAJUE114514 909 44 9ms 15 Aug 2025 156th rschwa6308 🇺🇸 909 44 10ms 24 Aug 2025 156th cpchenpi 909 44 14ms 27 Aug 2025 156th BrunoVisnadi 🇧🇷 909 44 9ms 30 Sep 2025 156th iczelia 🇩🇪 909 44 10ms 19 Oct 2025 156th Adix-null 🇱🇹 909 44 9ms 10 Nov 2025 156th mattyhempstead 909 44 10ms 7 hours ago 248th PFischbeck 889 45 15ms 30 Jan 2018 248th temich-nosov 889 45 9ms 17 Feb 2018 248th GeoffroyF 889 45 15ms 16 May 2018 248th daedals 889 45 9ms 24 Apr 2019 248th markus-rekdal 889 45 9ms 11 Jun 2019 248th dzhang314 889 45 9ms 13 Aug 2019 248th cellobix 889 45 18ms 14 Aug 2019 248th sk- 889 45 9ms 18 Sep 2019 248th hoodadam 889 45 9ms 23 Sep 2019 248th jmhowl 889 45 9ms 21 Dec 2019 248th Iluvatar 889 45 9ms 10 May 2020 248th chrismilson 889 45 9ms 18 May 2020 248th GalladeGuy 🇺🇸 889 45 10ms 20 May 2020 248th antimon2 🇯🇵 889 45 10ms 27 Jul 2020 248th thisishowmymindworks 🇳🇴 889 45 9ms 23 Aug 2020 248th atakan-se 889 45 9ms 27 Sep 2020 248th jn-lp 🇺🇦 889 45 9ms 29 Oct 2020 248th huderlem 889 45 9ms 10 Dec 2020 248th Euan-Hall 889 45 9ms 16 Dec 2020 248th argusdusty 🇺🇸 889 45 10ms 31 Dec 2020 248th adityasingh-code 889 45 9ms 2 Jan 2021 248th jameslindesay 889 45 9ms 24 Feb 2021 248th vezzick 889 45 9ms 6 Mar 2021 248th peculiarination 889 45 9ms 28 Apr 2021 248th og2701 889 45 9ms 14 May 2021 248th SniperSmiley 🇺🇸 889 45 10ms 22 Jun 2021 248th gurleen 889 45 9ms 22 Jul 2021 248th RYNO8 889 45 9ms 7 Aug 2021 248th ValdeQwerty 889 45 9ms 22 Sep 2021 248th itsjustfreekie 889 45 9ms 22 Sep 2021 248th alichraghi 889 45 9ms 15 Oct 2021 248th Kloppermand 🇩🇰 889 45 11ms 30 Nov 2021 248th Frowny 889 45 9ms 30 Jan 2022 248th ademdj19 889 45 8ms 13 Apr 2022 248th Romain-1 🇫🇷 889 45 9ms 1 Jun 2022 248th cyxv 889 45 10ms 1 Jul 2022 248th cyborgdennett 889 45 9ms 2 Aug 2022 248th jaxmattfair 🇺🇸 889 45 9ms 31 Aug 2022 248th Bodo171 889 45 9ms 24 Nov 2022 248th DaCuteRaccoon 889 45 9ms 30 Nov 2022 248th ItsMeNoobieboy 889 45 15ms 22 Dec 2022 248th bobbysq 889 45 9ms 4 Jan 2023 248th Skwerl23 889 45 11ms 5 Feb 2023 248th NoahBolohan 🇨🇦 889 45 9ms 9 Feb 2023 248th BREMAUCY 🇫🇷 889 45 9ms 15 Mar 2023 248th griffinschreiber 889 45 9ms 24 Jun 2023 248th adriweb 🇫🇷 889 45 9ms 21 Aug 2023 248th MiranDaniel 🇨🇿 889 45 9ms 31 Aug 2023 248th LucasChilders 889 45 9ms 14 Sep 2023 248th Griff95 889 45 10ms 21 Sep 2023 248th deerawj 889 45 9ms 13 Oct 2023 248th Vinterion 889 45 9ms 28 Oct 2023 248th two-bad 🇬🇧 889 45 9ms 26 Nov 2023 248th mqyhlkahu 889 45 9ms 27 Nov 2023 248th dylanarmstrong 889 45 11ms 2 Jan 2024 248th GeorgeStechman 🇬🇧 889 45 9ms 6 Jan 2024 248th OwPowell 889 45 17ms 7 Jan 2024 248th Trusly 889 45 9ms 26 Feb 2024 248th FCORMERAIS 889 45 9ms 4 Mar 2024 248th trinityy-7 889 45 9ms 6 Mar 2024 248th Grrisly 889 45 11ms 25 Mar 2024 248th jtaxen 889 45 11ms 27 Mar 2024 248th aalec 889 45 9ms 24 Apr 2024 248th Powerroff 889 45 9ms 5 May 2024 248th mkitti 🇺🇸 889 45 9ms 2 Jul 2024 248th LostSyntax21 🇬🇧 889 45 10ms 8 Sep 2024 248th agreegious 889 45 14ms 17 Nov 2024 248th nishkp 889 45 9ms 18 Nov 2024 248th TralfamadorianComedian 889 45 9ms 6 Dec 2024 248th yujh-yujh 🇬🇸 889 45 9ms 14 Jan 2025 248th keelimeguy 🇺🇸 889 45 9ms 7 May 2025 248th BenjaminHGong 889 45 9ms 23 May 2025 248th dokutan 889 45 9ms 30 Jun 2025 First Prev 241–320 of 1,271 Next Last