The Calendar hole will go live in approximately 6 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 398th Cube14yt 645 76 17ms 19 Nov 2025 402nd eggplants 🇯🇵 636 77 9ms 26 Nov 2020 402nd tomh1012 636 77 9ms 7 Jun 2021 402nd CedricGebistorf 636 77 9ms 12 Mar 2022 402nd juef17 636 77 23ms 11 Jun 2024 406th lukasthaler 628 78 11ms 11 Sep 2020 406th madeforlosers 628 78 9ms 5 Sep 2024 406th olikmujnyhbtgvfc 628 78 12ms 22 Nov 2024 406th kasarino 628 78 1,322ms 24 Nov 2025 410th eiburns 620 79 11ms 21 Jan 2023 410th AndrewDTR 620 79 12ms 8 Feb 2023 410th CheeseCake628 🇳🇴 620 79 192ms 23 Mar 2023 410th Vaekor 620 79 9ms 9 Jul 2023 410th liam824css 620 79 11ms 2 Mar 2025 410th Andrey135296 620 79 158ms 6 May 2025 416th RaBa21 🇭🇺 613 80 26ms 18 Jul 2025 416th TJK-S 613 80 14ms 28 Oct 2025 418th geofft 605 81 89ms 13 Dec 2020 418th xAspirus 605 81 11ms 29 Mar 2022 418th camzach 605 81 12ms 24 Jun 2024 418th NickTheEASDude 🇺🇸 605 81 26ms 20 Aug 2024 418th WillowWispy 605 81 9ms 20 Mar 2025 418th 52525rr 605 81 12ms 4 May 2025 424th abailey2020 🇺🇸 598 82 38ms 13 Dec 2020 424th wh3n3v3r 🇨🇿 598 82 12ms 8 Nov 2024 426th driri85 590 83 12ms 7 Jan 2025 427th lhulinsky 583 84 116ms 22 Oct 2024 428th dyc3 576 85 9ms 2 Jul 2020 428th amollberg 🇸🇪 576 85 18ms 25 Jan 2022 428th jmmographer 576 85 12ms 22 Oct 2023 428th adamnielson42 🇺🇸 576 85 25ms 5 Dec 2023 428th roguh 🇬🇹 576 85 23ms 9 Jan 2024 428th aalec 576 85 58ms 8 Nov 2025 434th elteammate 570 86 22ms 7 Jul 2020 434th yasufumy 570 86 12ms 15 Jul 2020 434th Mathrew2012 570 86 10ms 13 Jun 2025 437th ssilwa 563 87 14ms 2 Jun 2019 437th twocatsinatrenchcoat 563 87 23ms 19 Nov 2021 437th jstechman 563 87 10ms 24 Feb 2024 437th CutSandstone 563 87 156ms 3 Jul 2024 441st martinnorling 🇸🇪 557 88 14ms 29 Mar 2022 441st andre-lameirinhas 🇵🇹 557 88 12ms 17 Nov 2022 443rd Festyve 551 89 11ms 18 Mar 2023 443rd anonymaew 551 89 22ms 2 Aug 2023 443rd nemulilonala 551 89 12ms 22 Nov 2024 446th benjitorres 538 91 12ms 29 Dec 2022 447th zuparnowa 527 93 13ms 29 May 2019 447th henrytranter 527 93 12ms 20 Sep 2019 447th NatNgs 527 93 9ms 7 Jan 2020 450th LukasFolwarczny 🇨🇿 521 94 154ms 15 Sep 2022 450th BlankSpruce 521 94 60ms 2 Oct 2022 450th Bodo171 521 94 89ms 27 Nov 2022 453rd nullie 516 95 16ms 18 Jun 2022 454th Arridian 510 96 23ms 27 Sep 2021 454th VictorFordham 510 96 35ms 16 Dec 2023 456th draxler-h 495 99 13ms 14 Jan 2023 456th felixcroc 495 99 12ms 30 Mar 2023 456th jaydity 495 99 13ms 10 Feb 2024 456th Code-Coder-coder 495 99 663ms 23 Nov 2025 460th SniperSmiley 🇺🇸 490 100 181ms 2 Jun 2022 461st petroselo 485 101 94ms 13 Apr 2022 461st ejini6969 485 101 12ms 23 Mar 2023 461st qwjhvbxi 485 101 12ms 4 Mar 2024 464th brian6liu 480 102 68ms 8 May 2020 464th AodhanDalton 480 102 12ms 8 Nov 2022 466th AaronHe7 476 103 12ms 21 Nov 2022 466th Mikey-Beep 🇬🇧 476 103 60ms 2 Jun 2024 466th robin-scragg 476 103 12ms 25 Oct 2025 469th boxjelly 467 105 18ms 8 Jan 2021 469th ms-tingliang 467 105 48ms 5 Aug 2022 469th randolchance 467 105 90ms 11 Feb 2023 472nd joonaspu 462 106 25ms 3 Jun 2023 473rd TorbjornBak 458 107 12ms 8 Nov 2024 474th Pena86 450 109 11ms 2 Mar 2021 474th dhruvkumaragrawal85 450 109 12ms 9 Mar 2024 476th Urbi111 445 110 13ms 22 Oct 2020 477th AcidicNic 438 112 11ms 30 Sep 2020 477th colin-bethea 438 112 12ms 15 Sep 2021 477th leptio 438 112 124ms 1 Oct 2025 480th sln786 430 114 23ms 4 Oct 2023 First Prev 401–480 of 568 Next Last