The Calendar hole will go live in approximately 3 days. Why not try and solve it ahead of time?
√2 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 321st jmhowl 710 69 11ms 19 Jan 2020 321st cmdrsabre 710 69 11ms 30 Jan 2020 321st artyom-razinov 710 69 12ms 13 Feb 2020 321st HemangRajvanshy 710 69 12ms 1 Apr 2020 321st msrawson 710 69 12ms 14 May 2020 321st PyPylia 🇦🇺 710 69 11ms 7 Aug 2020 321st billylanchantin 710 69 12ms 23 Aug 2020 321st magnickolas 710 69 13ms 29 Aug 2020 321st WillowBee7 710 69 11ms 28 Sep 2020 321st ralsei 710 69 11ms 6 Oct 2020 321st jdrouvin 710 69 12ms 2 Dec 2020 321st befoster 710 69 9ms 10 Apr 2021 321st StHagel 710 69 12ms 7 May 2021 321st 8Bit1Byte 710 69 12ms 20 Jun 2021 321st Fmbalbuena 710 69 12ms 17 Sep 2021 321st Ted-Barrett 🇦🇺 710 69 11ms 29 Sep 2021 321st forlack 710 69 11ms 8 Nov 2021 321st shibacho 🇯🇵 710 69 12ms 27 Nov 2021 321st pecholsjones 710 69 12ms 12 Dec 2021 321st CuboidRaptor 🇨🇦 710 69 12ms 3 Apr 2022 321st MakkCH 710 69 11ms 24 Apr 2022 321st CarsonChr 🇺🇸 710 69 12ms 18 Sep 2022 321st bonevbs 710 69 12ms 20 Nov 2022 321st KevinLyvers 710 69 12ms 13 Dec 2022 321st jtaxen 710 69 12ms 4 Jan 2023 321st SucukMitEi 710 69 12ms 7 Jan 2023 321st atazzam 🇺🇸 710 69 12ms 5 Mar 2023 321st DrPiranoid 710 69 12ms 26 Mar 2023 321st Hortaros 710 69 11ms 15 Apr 2023 321st willdaspit 710 69 11ms 4 Aug 2023 321st XioR112 🇵🇱 710 69 13ms 29 Aug 2023 321st jameswmccarty 710 69 12ms 6 Jun 2024 321st dtbao20 🇻🇳 710 69 12ms 8 Oct 2024 321st sciencedjinn 710 69 12ms 8 Nov 2024 321st Unknownuserfrommars 710 69 13ms 21 Nov 2024 321st yokasuretsu 710 69 9ms 31 Dec 2024 321st clayboll99 710 69 12ms 10 Jul 2025 321st webmiche 710 69 12ms 3 Nov 2025 359th petar-donchev 700 70 46ms 1 Sep 2019 359th cubed-guy 700 70 53ms 20 Sep 2021 359th kenny14231 700 70 11ms 9 Oct 2021 359th GioacchinoGT02 700 70 12ms 3 Dec 2024 363rd teddyward 690 71 12ms 9 Jan 2021 363rd xkacer 🇨🇿 690 71 12ms 25 Jan 2021 363rd sadfun 690 71 12ms 29 Jan 2021 363rd ArmaanAS 690 71 9ms 24 Mar 2021 363rd classAndrew 690 71 12ms 1 Aug 2021 363rd SpareManiKatti 690 71 9ms 10 Sep 2021 363rd JGDoerrer 690 71 11ms 22 Jan 2022 363rd lovernj 690 71 12ms 7 Feb 2022 363rd elephantpanda 690 71 9ms 31 Aug 2022 363rd sandorstormen 690 71 12ms 25 Nov 2022 363rd Vinterion 690 71 11ms 24 Jul 2023 363rd sulphemi 690 71 12ms 5 Oct 2023 363rd davidsaltacc 690 71 12ms 16 Nov 2023 363rd dal548 690 71 13ms 12 Jun 2024 363rd Mabeloid 🇳🇴 690 71 12ms 6 Sep 2024 363rd rustykitty 🇺🇸 690 71 13ms 25 Oct 2025 363rd muslii4 690 71 12ms 4 Nov 2025 380th paralysedforce 681 72 23ms 24 Nov 2020 380th AkashTandon167 681 72 9ms 1 Nov 2021 380th Bananapants22 681 72 12ms 16 Aug 2022 380th CatsAreFluffy 681 72 11ms 19 Feb 2023 380th Anthony-Williams-06 681 72 24ms 17 Oct 2023 385th trist224 🇫🇷 671 73 11ms 25 Dec 2022 385th TaserTheFox 🇺🇸 671 73 23ms 9 Feb 2023 385th Datadramah 671 73 13ms 12 Jan 2024 385th jacekwladzinski 671 73 12ms 6 Oct 2025 389th alangodfrey 662 74 25ms 10 Jun 2019 389th ay2718 662 74 13ms 19 Aug 2019 389th Wodinthemighty 662 74 12ms 4 May 2021 389th osmith93 662 74 9ms 31 Jul 2021 389th jamespeilunli 662 74 23ms 29 Dec 2021 389th OSYCh314 🇦🇺 662 74 23ms 9 Nov 2024 395th daedals 653 75 16ms 5 Jun 2019 395th jacklynnepenick 653 75 9ms 26 Aug 2021 395th za3k 653 75 58ms 8 Oct 2022 395th JonahEMorgan 653 75 12ms 9 Nov 2024 399th cole-wilson 645 76 23ms 10 Mar 2021 399th estomagordo 🇳🇱 645 76 22ms 9 Dec 2021 First 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