The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Sierpiński Triangle in all languages 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 801st Shanethegamer 🇺🇸 577 108 342ms 26 Mar 2022 802nd knutae 🇳🇴 576 92 10ms 4 Dec 2021 802nd hellwue 576 92 9ms 29 Aug 2024 804th frankgraziano 576 96 5ms 19 Feb 2025 805th Yewzir 🇧🇪 575 91 2ms 8 Apr 2024 805th emgordon154 575 91 120ms 24 Sep 2024 807th Yewzir 🇧🇪 575 120 395ms 29 Mar 2024 808th cbrt-x 574 116 115ms 11 Oct 2023 809th ETHproductions 🇺🇸 573 80 9ms 25 Jul 2018 809th madex 🇩🇪 573 80 9ms 3 Aug 2021 809th fitzdotlol 🇺🇸 573 80 9ms 21 Mar 2022 809th trinityy-7 573 80 9ms 8 Oct 2024 813th retrohun 573 94 1ms 9 Mar 2019 813th djeedjay 🇳🇱 573 94 1ms 29 Oct 2020 815th MeWhenI 🇻🇦 573 120 3ms 2 Oct 2022 816th arctouch-cristiannevianna 571 109 326ms 24 Nov 2023 817th RussellEmerine 570 117 117ms 9 Apr 2020 817th guliyevemil1 🇦🇿 570 117 124ms 20 Apr 2020 819th skps2010 569 93 10ms 15 Jun 2019 819th tooningelaere 569 93 10ms 4 Dec 2022 819th andre-lameirinhas 🇵🇹 569 93 9ms 23 May 2023 819th vhoulbreque 🇫🇷 569 93 10ms 19 days ago 823rd user189032 566 81 8ms 29 May 2019 824th rak1507 🇬🇧 565 118 121ms 29 Jun 2021 825th HumanoidCPU 565 124 209ms 12 Nov 2025 826th dokutan 564 196 1ms 15 Oct 2024 827th DialFrost 🇸🇬 563 82 227ms 14 Jun 2024 828th Shanethegamer 🇺🇸 563 93 2ms 31 Oct 2022 828th alphafalfa 563 93 2ms 1 Aug 2025 830th ieeemma 563 94 10ms 1 Feb 2020 830th OllieBoyne 🇬🇧 563 94 11ms 29 Jan 2021 830th Mikey-Beep 🇬🇧 563 94 10ms 2 Jun 2024 830th solisolu 563 94 10ms 15 Nov 2025 834th Shanethegamer 🇺🇸 563 103 98ms 26 Mar 2022 835th jmerle 🇳🇱 561 275 7ms 4 Jul 2023 836th anastos 560 119 116ms 23 Jul 2018 837th Yewzir 🇧🇪 557 86 2ms 15 Oct 2023 838th martinnorling 🇸🇪 557 95 10ms 31 Mar 2022 838th rollershutter 557 95 12ms 30 Jun 2024 838th hiichbindermax 557 95 9ms 17 Sep 2024 838th ToE42 557 95 10ms 28 May 2025 842nd dokutan 557 126 718ms 8 days ago 843rd DaCuteRaccoon 556 80 34ms 27 Apr 2022 843rd aksyristos 556 80 36ms 31 Jan 2023 845th mossprescott 555 120 108ms 13 Aug 2018 845th janbehrens 🇩🇪 555 120 114ms 17 Jun 2021 847th emgordon154 555 179 1,666ms 3 Jun 2025 848th TheZwierzLF 🇵🇱 554 88 392ms 25 days ago 849th janlelis 553 83 9ms 9 Feb 2021 849th Shanethegamer 🇺🇸 553 83 9ms 16 Jul 2021 851st Indivicivet 552 96 10ms 17 Mar 2021 851st Bonjour27891 🇻🇳 552 96 12ms 6 Mar 2022 851st nullie 552 96 9ms 15 Jun 2022 851st johndixon01 552 96 10ms 22 Sep 2022 851st ridingqwerty 🇺🇸 552 96 10ms 19 Dec 2023 851st theadamabrams 552 96 9ms 28 Nov 2024 851st TheZwierzLF 🇵🇱 552 96 9ms 25 days ago 858th Yewzir 🇧🇪 551 120 36ms 29 Mar 2024 859th olleicua 🇺🇸 550 81 37ms 15 Feb 2024 860th Shanethegamer 🇺🇸 550 228 803ms 24 Apr 2025 861st dokutan 549 281 8ms 12 Jan 2024 862nd janbehrens 🇩🇪 548 128 120ms 17 Jun 2021 863rd Yewzir 🇧🇪 547 106 78ms 29 Mar 2024 864th DialFrost 🇸🇬 547 126 553ms 8 Jun 2024 865th wadefletch 546 97 9ms 8 Feb 2020 865th Psirving 546 97 9ms 1 Aug 2020 865th AkashTandon167 546 97 11ms 3 Jan 2021 865th kirbyyourmom 🇬🇧 546 97 10ms 4 Mar 2021 865th vezzick 546 97 10ms 12 Mar 2021 865th jtaxen 546 97 9ms 5 Apr 2024 871st revlayle 🇺🇸 546 114 332ms 10 Dec 2022 872nd albanian-laundromat 545 98 8ms 16 Nov 2025 873rd KatieLG 🇬🇧 545 203 1ms 17 May 2025 874th MeWhenI 🇻🇦 544 111 40ms 11 Jun 2023 875th MeWhenI 🇻🇦 544 144 132ms 22 Apr 2024 876th dokutan 543 114 66ms 6 days ago 877th dokutan 543 131 83ms 21 Jun 2025 878th olligobber 🇦🇺 542 123 115ms 18 May 2020 879th emgordon154 542 204 2ms 23 May 2025 880th DialFrost 🇸🇬 540 87 4ms 28 Nov 2023 First Prev 801–880 of 2,038 Next Last