The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
√2 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 stefangimmillaro 708 190 127ms 4 Jun 2025 802nd markus-rekdal 705 68 23ms 31 May 2019 802nd qoqosz 705 68 12ms 6 Jun 2019 802nd giacomogallina 705 68 11ms 6 Jun 2019 802nd skps2010 705 68 11ms 14 Jun 2019 802nd hoodadam 705 68 12ms 19 Jul 2019 802nd dzhang314 705 68 12ms 14 Aug 2019 802nd sk- 705 68 11ms 11 Sep 2019 802nd handisb 705 68 12ms 2 Nov 2019 802nd amishtal 705 68 12ms 27 Nov 2019 802nd Haksell 🇦🇶 705 68 11ms 1 Dec 2019 802nd Matistjati 705 68 12ms 3 Dec 2019 802nd Daniel-Martin576 705 68 12ms 1 Apr 2020 802nd Jviscus1 705 68 12ms 24 Apr 2020 802nd GalladeGuy 🇺🇸 705 68 11ms 23 May 2020 802nd aliakseikalosha 705 68 12ms 9 Jun 2020 802nd Jumprocks1 705 68 12ms 11 Jun 2020 802nd itiievskyi 🇺🇦 705 68 11ms 30 Jul 2020 802nd dev-loop0 705 68 11ms 20 Aug 2020 802nd linstr13 705 68 12ms 29 Sep 2020 802nd mueller14003 705 68 12ms 8 Oct 2020 802nd davidverweij 705 68 12ms 21 Oct 2020 802nd martinsifrar 705 68 12ms 23 Oct 2020 802nd Dazza314 🇬🇧 705 68 11ms 6 Nov 2020 802nd austinrwarner 705 68 12ms 25 Dec 2020 802nd Tess2662 705 68 12ms 11 Jan 2021 802nd fynnkroeger 705 68 11ms 20 Jan 2021 802nd ydevor 🇮🇱 705 68 12ms 22 Feb 2021 802nd asadullayev 705 68 12ms 3 Mar 2021 802nd orifu 705 68 11ms 19 Mar 2021 802nd josephjojoe 705 68 12ms 19 Mar 2021 802nd harrymwilkins 🇬🇧 705 68 12ms 18 Jul 2021 802nd ngocbd 🇻🇳 705 68 12ms 31 Aug 2021 802nd potato-jackson 705 68 12ms 6 Sep 2021 802nd ToE42 705 68 11ms 7 Sep 2021 802nd ehulinsky 🇺🇸 705 68 14ms 16 Sep 2021 802nd redbeancola 705 68 12ms 11 Oct 2021 802nd walterfeyman 705 68 12ms 30 Oct 2021 802nd xy3 🇮🇪 705 68 12ms 18 Nov 2021 802nd sleepyStick 705 68 12ms 7 Dec 2021 802nd akshatj27 🇦🇶 705 68 12ms 11 Jan 2022 802nd Bonjour27891 🇻🇳 705 68 11ms 10 Feb 2022 802nd LeeCamp 705 68 12ms 15 Feb 2022 802nd suwat513 705 68 11ms 23 Sep 2022 802nd ValentinCassayre 705 68 12ms 9 Oct 2022 802nd aksyristos 705 68 12ms 30 Oct 2022 802nd Omega65536 🇩🇪 705 68 11ms 23 Nov 2022 802nd jfallon1997 705 68 12ms 3 Jan 2023 802nd Smoncko 705 68 12ms 1 Feb 2023 802nd DragonaireM 705 68 12ms 6 Feb 2023 802nd m3nt0ras 🇬🇷 705 68 12ms 16 Feb 2023 802nd MiranDaniel 🇨🇿 705 68 11ms 29 Apr 2023 802nd sd3b 705 68 11ms 1 May 2023 802nd ZoeyKD 705 68 12ms 14 May 2023 802nd Ripick 705 68 12ms 22 May 2023 802nd msbranicky 705 68 12ms 10 Jul 2023 802nd Stockoh 🇫🇷 705 68 12ms 5 Nov 2023 802nd firegene 🇮🇪 705 68 11ms 24 Nov 2023 802nd m42km 705 68 12ms 8 Dec 2023 802nd epic-programmer-guy 705 68 11ms 17 Dec 2023 802nd smokestacklightnin 🇺🇸 705 68 12ms 29 Dec 2023 802nd Dataen 705 68 12ms 12 Jan 2024 802nd scpchicken 🇵🇼 705 68 12ms 1 Feb 2024 802nd Just4FunCoder 705 68 12ms 26 Feb 2024 802nd sultan 705 68 11ms 9 Mar 2024 802nd stertooy 🇧🇪 705 68 11ms 11 Jun 2024 802nd codingisgreatbutiamnot 705 68 15ms 14 Jul 2024 802nd voytxt 🇨🇿 705 68 12ms 13 Sep 2024 802nd starfihs 705 68 12ms 26 Feb 2025 802nd gigaprofisi 🇺🇸 705 68 11ms 2 Mar 2025 802nd 0dyse 705 68 12ms 29 Apr 2025 802nd codewrite 🇬🇧 705 68 12ms 7 May 2025 802nd Voltrifrodec 🇸🇰 705 68 11ms 14 May 2025 802nd JOrE-Softwares 705 68 12ms 21 May 2025 802nd BenjaminHGong 705 68 12ms 23 May 2025 802nd sainiayush 705 68 12ms 14 Jul 2025 802nd GoldStar184 705 68 12ms 17 Jul 2025 802nd cthierfelder 🇲🇨 705 68 12ms 7 Aug 2025 802nd Upload-and-View 🇺🇦 705 68 12ms 9 Aug 2025 802nd 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